WO2017057267A1

WO2017057267A1 - Imaging device and focus detection device

Info

Publication number: WO2017057267A1
Application number: PCT/JP2016/078255
Authority: WO
Inventors: 孝塩野谷; 敏之神原; 直樹關口
Original assignee: 株式会社ニコン
Priority date: 2015-09-30
Filing date: 2016-09-26
Publication date: 2017-04-06
Also published as: JPWO2017057267A1

Abstract

This imaging device is provided with: a first imaging element which has a first imaging region which images a subject through a lens capable of moving in the optical axis direction of the optical system and outputs a first signal, and a second imaging region which images the subject and outputs a second signal; a setting unit which sets the imaging condition of the first imaging region to an imaging condition different from that of the second imaging region; a correction unit which corrects the second signal, outputted from the second imaging region, for use in interpolation of the first signal, outputted from the first imaging region; and a control unit which controls movement of the lens using the signal obtained by interpolation of the first signal by means of the second signal which was corrected by the correction unit.

Description

Imaging device and focus detection device

The present invention relates to an imaging device and a focus detection device.

An imaging apparatus equipped with an imaging element capable of setting different imaging conditions for each screen area is known (see Patent Document 1). However, the imaging conditions have not been taken into account when processing image data generated in regions with different imaging conditions.

Japanese Unexamined Patent Publication No. 2006-197192

According to the first aspect, the imaging apparatus captures the subject through the lens movable in the optical axis direction of the optical system and outputs the first signal, and captures the subject and outputs the second signal. An imaging device having a second imaging area that outputs a signal; a setting unit that sets an imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area; and the second imaging area A correction unit that performs correction for use in interpolation of the first signal output from the first imaging region with respect to the second signal output from the first imaging region, and the second signal corrected by the correction unit And a control unit that controls movement of the lens using a signal obtained by interpolating the first signal.
According to the second aspect, the imaging apparatus images the subject via the lens that adjusts the focus position of the optical system and outputs the first signal, and images the subject via the lens. An imaging device having a second imaging area that outputs a second signal, a setting unit that sets an imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area, and the first A correction unit that corrects the second signal output from the two imaging regions for use in interpolation of the first signal output from the first imaging region; and the second signal corrected by the correction unit. A control unit that controls driving of the lens according to a focus state of the optical system detected using a signal obtained by interpolating the first signal with a signal.
According to the third aspect, the imaging apparatus captures the subject through the lens movable in the optical axis direction of the optical system, outputs the first signal, and captures the subject. An imaging device having a second imaging area that outputs a signal; a setting unit that sets an imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area; and the second imaging area A correction unit that performs correction for reducing noise included in the first signal output from the first imaging region with respect to the second signal output from the first imaging region; and the first signal corrected by the correction unit A control unit that controls movement of the lens using a signal in which noise included in the first signal is reduced by two signals.
According to the fourth aspect, the imaging device images the subject via the lens that adjusts the focus position of the optical system and outputs the first signal, and images the subject via the lens. An imaging device having a second imaging area that outputs a second signal, a setting unit that sets an imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area, and the first A correction unit that performs correction to reduce noise included in the first signal output from the first imaging region is corrected by the correction unit with respect to the second signal output from two imaging regions. And a control unit that controls the driving of the lens according to the in-focus state of the optical system detected using a signal in which noise included in the first signal is reduced by the second signal.
According to the fifth aspect, the imaging apparatus images the subject via the lens that adjusts the focus position of the optical system and outputs the first signal, and images the subject via the lens. An imaging device having a second imaging area that outputs a second signal, a setting unit that sets an imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area, and the first A correction unit that corrects the second signal output from the second imaging region based on an imaging condition of one imaging region or an imaging condition of the second imaging region, and the first signal and the correction unit correct the second signal. A control unit that controls driving of the lens according to a focus state of the optical system detected using the second signal.
According to the sixth aspect, the imaging apparatus images the subject via the lens that adjusts the focus position of the optical system and outputs the first signal, and images the subject via the lens. An imaging device having a second imaging area that outputs a second signal, a setting unit that sets an imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area, and the first A correction unit that corrects the second signal output from the second imaging region based on the imaging condition of one imaging region and the imaging condition of the second imaging region, and is corrected by the first signal and the correction unit. And a control unit that controls driving of the lens according to a focused state of the optical system detected using the second signal.
According to the seventh aspect, the imaging apparatus images the subject via the lens that adjusts the focus position of the optical system and outputs the first signal, and images the subject via the lens. An imaging device having a second imaging area that outputs a second signal, a setting unit that sets an imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area, and the first The first signal output from the first imaging area is corrected based on an imaging condition of one imaging area, and the output from the second imaging area is corrected based on a setting value of an imaging condition of the second imaging area. A correction unit that corrects the second signal, and a signal obtained by interpolating the first signal corrected by the correction unit and the pixel that outputs the first signal corrected by the second signal corrected by the correction unit. Depending on the in-focus state of the optical system detected using And a control unit for controlling the driving of the serial lens.
According to the eighth aspect, the imaging apparatus images the subject via the lens that adjusts the focus position of the optical system and outputs the first signal, and images the subject via the lens. An imaging device having a second imaging area that outputs a second signal, a setting unit that sets an imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area, and the first Correction for correcting the first signal output from one imaging region and using the second signal output from the second imaging region for interpolation of a pixel that outputs the corrected first signal The lens drive is controlled by the in-focus state of the optical system detected using the correction unit that performs the correction, the first signal corrected by the correction unit, and the second signal corrected by the correction unit. A control unit.
According to the ninth aspect, the focus detection device captures the imaging condition of the first imaging region of the imaging device that captures an image of the subject and outputs the first signal through the lens that is movable in the optical axis direction of the optical system. An imaging condition that is different from the imaging condition of the second imaging area of the imaging element that images the subject via the lens and outputs the second signal is set to the second signal output from the second imaging area. A correction unit that performs correction for use in interpolation of the first signal output from the first imaging region, and a signal obtained by interpolating the first signal with the second signal corrected by the correction unit. And a control unit for controlling movement of the lens.
According to the tenth aspect, the focus detection device captures the imaging condition of the first imaging region of the imaging device that images the subject via the lens that adjusts the focus position of the optical system and outputs the first signal. An imaging condition that is different from the imaging condition of the second imaging area of the imaging element that images the subject and outputs the second signal via the second imaging area is output to the second signal output from the second imaging area. A correction unit that performs correction for use in interpolation of the first signal output from the first imaging region and a second signal output from the second imaging region are output from the first imaging region. A correction unit that performs correction for use in interpolation of the first signal, and a focus of the optical system that is detected using a signal obtained by interpolating the first signal with the second signal corrected by the correction unit. Control to control the driving of the lens according to the state And, equipped with a.
According to the eleventh aspect, the focus detection device captures the imaging condition of the first imaging region of the imaging element that captures an image of the subject and outputs the first signal through the lens that is movable in the optical axis direction of the optical system. An imaging condition that is different from the imaging condition of the second imaging area of the imaging element that images the subject via the lens and outputs the second signal is set to the second signal output from the second imaging area. , A correction unit that performs correction to reduce noise included in the first signal output from the first imaging region, and noise included in the first signal by the second signal corrected by the correction unit And a control unit for controlling the movement of the lens using a signal with reduced signal.
According to the twelfth aspect, the focus detection apparatus captures the imaging condition of the first imaging region of the imaging element that captures an image of the subject and outputs the first signal via the lens that adjusts the focus position of the optical system. An imaging condition that is different from the imaging condition of the second imaging area of the imaging element that images the subject and outputs the second signal via the second imaging area is output to the second signal output from the second imaging area. Detection is performed using a correction unit that performs correction to reduce noise included in the first signal output from the first imaging region, and the first signal and the second signal corrected by the correction unit. And a control unit that controls driving of the lens according to a focused state of the optical system.
According to the thirteenth aspect, the imaging device captures the light incident through the optical system under a first imaging condition to generate first signal data, and the incident light with the first imaging condition. An imaging unit having a second area that captures an image under a second imaging condition different from the second imaging data and generates second signal data, and the first signal data generated by the imaging unit is based on the second imaging condition. A signal for driving the optical system based on the correction unit corrected by the correction unit, the first signal data corrected based on the correction unit, and the second signal data generated by the imaging unit. A generating unit for generating.
According to the fourteenth aspect, the focus detection device receives the first signal data generated by imaging the light incident on the first region of the imaging unit via the optical system under the first imaging condition, and outputs the first signal data of the imaging unit. A correction unit configured to correct based on a second imaging condition different from the first imaging condition for imaging light incident on the second region; the first signal data corrected by the correction unit; and the second region A generation unit configured to generate a signal for driving the optical system based on second signal data generated by imaging incident light.

It is a block diagram which illustrates the composition of the camera by a 1st embodiment. It is sectional drawing of a laminated type image pick-up element. It is a figure explaining the pixel arrangement | sequence and unit area | region of an imaging chip. It is a figure explaining the circuit in a unit area. It is a figure which shows typically the image of the to-be-photographed object imaged on the image pick-up element of a camera. It is a figure which illustrates the setting screen of imaging conditions. FIG. 7A is a diagram illustrating the vicinity of the boundary of the first region in the live view image, FIG. 7B is an enlarged view of the vicinity of the boundary, and FIG. 7C is an enlarged view of the target pixel and the reference pixel. . 8A is a diagram illustrating the arrangement of photoelectric conversion signals output from the pixels, FIG. 8B is a diagram illustrating interpolation of image data of the G color component, and FIG. 8C is a diagram illustrating G after interpolation. It is a figure which illustrates the image data of a color component. 9A is a diagram obtained by extracting image data of the R color component from FIG. 8A, FIG. 9B is a diagram illustrating interpolation of the color difference component Cr, and FIG. 9C is an image of the color difference component Cr. It is a figure explaining the interpolation of data. 10A is a diagram obtained by extracting B color component image data from FIG. 8A, FIG. 10B is a diagram illustrating interpolation of the color difference component Cb, and FIG. 10C is an image of the color difference component Cb. It is a figure explaining the interpolation of data. It is a figure which illustrates the position of the pixel for focus detection in an imaging surface. It is the figure which expanded the one part area | region of the focus detection pixel line. It is the figure which expanded the focus detection position. FIG. 14A is a diagram illustrating a template image representing an object to be detected, and FIG. 14B is a diagram illustrating a live view image and a search range. It is a flowchart explaining the flow of the process which sets an imaging condition for every area and images. FIGS. 16A to 16C are diagrams illustrating the arrangement of the first region and the second region on the imaging surface of the imaging device. FIG. 20 is a block diagram illustrating a configuration of an imaging system according to Modification 11. It is a figure explaining supply of the program to a mobile device. It is a block diagram which illustrates the composition of the camera by a 2nd embodiment. It is the figure which showed typically the correspondence of each block in 2nd Embodiment, and several correction | amendment parts. It is sectional drawing of a multilayer type image pick-up element. It is the figure which represented typically about the process with 1st image data and 2nd image data concerning an image process. It is the figure which represented typically about the process of 1st image data and 2nd image data which concerns on a focus detection process. It is the figure which represented typically about the process of 1st image data and 2nd image data regarding a to-be-photographed object detection process. It is the figure which represented typically about the process of 1st image data and 2nd image data concerning the setting of imaging conditions, such as exposure calculation processing. It is the figure which represented typically about the process with the 1st image data by the modification 13, and 2nd image data. It is the figure which represented typically about the process with the 1st image data by the modification 13, and 2nd image data. It is the figure which represented typically about the process with the 1st image data by the modification 13, and 2nd image data. It is the figure which represented typically about the process with the 1st image data by the modification 13, and 2nd image data.

--- First embodiment ---
A digital camera will be described as an example of an electronic device equipped with the image processing apparatus according to the first embodiment. The camera 1 (FIG. 1) is configured to be able to capture images under different conditions for each region of the imaging surface of the image sensor 32a. The image processing unit 33 performs appropriate processing in areas with different imaging conditions. Details of the camera 1 will be described with reference to the drawings.

<Explanation of camera>
FIG. 1 is a block diagram illustrating the configuration of the camera 1 according to the first embodiment. In FIG. 1, the camera 1 includes an imaging optical system 31, an imaging unit 32, an image processing unit 33, a control unit 34, a display unit 35, an operation member 36, and a recording unit 37.

The imaging optical system 31 guides the light flux from the object scene to the imaging unit 32. The imaging unit 32 includes an imaging element 32a and a driving unit 32b, and photoelectrically converts an object image formed by the imaging optical system 31. The imaging unit 32 can capture images under the same conditions over the entire imaging surface of the imaging device 32a, or can perform imaging under different conditions for each region of the imaging surface of the imaging device 32a. Details of the imaging unit 32 will be described later. The drive unit 32b generates a drive signal necessary for causing the image sensor 32a to perform accumulation control. An imaging instruction such as a charge accumulation time for the imaging unit 32 is transmitted from the control unit 34 to the driving unit 32b.

The image processing unit 33 includes an input unit 33a, a correction unit 33b, and a generation unit 33c. Image data acquired by the imaging unit 32 is input to the input unit 33a. The correction unit 33b performs preprocessing for correcting the input image data. Details of the preprocessing will be described later. The generation unit 33c generates an image based on the input image data and the preprocessed image data. The generation unit 33c performs image processing on the image data. Image processing includes, for example, color interpolation processing, pixel defect correction processing, edge enhancement processing, noise reduction processing, white balance adjustment processing, gamma correction processing, display luminance adjustment processing, saturation adjustment processing, and the like. . Further, the generation unit 33 c generates an image to be displayed by the display unit 35.

The control unit 34 is constituted by a CPU, for example, and controls the overall operation of the camera 1. For example, the control unit 34 performs a predetermined exposure calculation based on the photoelectric conversion signal acquired by the imaging unit 32, the charge accumulation time (exposure time) of the imaging element 32a necessary for proper exposure, and the aperture of the imaging optical system 31. The exposure conditions such as the value and ISO sensitivity are determined and instructed to the drive unit 32b. In addition, image processing conditions for adjusting saturation, contrast, sharpness, and the like are determined and instructed to the image processing unit 33 according to the imaging scene mode set in the camera 1 and the type of the detected subject element. The detection of the subject element will be described later.

The control unit 34 includes an object detection unit 34a, a setting unit 34b, an imaging control unit 34c, and an AF calculation unit 34d. These are realized as software by the control unit 34 executing a program stored in a nonvolatile memory (not shown). However, these may be configured by an ASIC or the like.

The object detection unit 34a performs a known object recognition process, and from the image acquired by the imaging unit 32, a person (person's face), an animal such as a dog or a cat (animal face), a plant, a bicycle, an automobile , Detecting a subject element such as a vehicle such as a train, a building, a stationary object, a landscape such as a mountain or a cloud, or a predetermined specific object. The setting unit 34b divides the imaging screen by the imaging unit 32 into a plurality of regions including the subject element detected as described above.

The setting unit 34b further sets imaging conditions for a plurality of areas. Imaging conditions include the exposure conditions (charge accumulation time, gain, ISO sensitivity, frame rate, etc.) and the image processing conditions (for example, white balance adjustment parameters, gamma correction curves, display brightness adjustment parameters, saturation adjustment parameters, etc.) ). As the imaging conditions, the same imaging conditions can be set for all of the plurality of areas, or different imaging conditions can be set for the plurality of areas.

The imaging control unit 34c controls the imaging unit 32 (imaging element 32a) and the image processing unit 33 by applying imaging conditions set for each region by the setting unit 34b. Thereby, it is possible to cause the imaging unit 32 to perform imaging under different exposure conditions for each of the plurality of regions, and for the image processing unit 33, images with different image processing conditions for each of the plurality of regions. Processing can be performed. Any number of pixels may be included in the region, for example, 1000 pixels or 1 pixel. Further, the number of pixels may be different between regions.

The AF calculation unit 34d controls an automatic focus adjustment (autofocus: AF) operation for focusing on a corresponding subject at a predetermined position (referred to as a focus detection position) on the imaging screen. The AF calculation unit 34d sends a drive signal for moving the focus lens of the imaging optical system 31 to the in-focus position based on the calculation result to the drive unit 32b. The process performed by the AF calculation unit 34d for automatic focus adjustment is also referred to as a focus detection process. Details of the focus detection process will be described later.

The display unit 35 reproduces and displays the image generated by the image processing unit 33, the image processed image, the image read by the recording unit 37, and the like. The display unit 35 also displays an operation menu screen, a setting screen for setting imaging conditions, and the like.

The operation member 36 is composed of various operation members such as a release button and a menu button. The operation member 36 sends an operation signal corresponding to each operation to the control unit 34. The operation member 36 includes a touch operation member provided on the display surface of the display unit 35.

The recording unit 37 records image data or the like on a recording medium including a memory card (not shown) in response to an instruction from the control unit 34. The recording unit 37 reads image data recorded on the recording medium in response to an instruction from the control unit 34.

<Description of Laminated Image Sensor>
A laminated image sensor 100 will be described as an example of the image sensor 32a described above. FIG. 2 is a cross-sectional view of the image sensor 100. The imaging element 100 includes an imaging chip 111, a signal processing chip 112, and a memory chip 113. The imaging chip 111 is stacked on the signal processing chip 112. The signal processing chip 112 is stacked on the memory chip 113. The imaging chip 111, the signal processing chip 112, the signal processing chip 112, and the memory chip 113 are electrically connected by a connection unit 109. The connection unit 109 is, for example, a bump or an electrode. The imaging chip 111 captures a light image from a subject and generates image data. The imaging chip 111 outputs image data from the imaging chip 111 to the signal processing chip 112. The signal processing chip 112 performs signal processing on the image data output from the imaging chip 111. The memory chip 113 has a plurality of memories and stores image data. Note that the image sensor 100 may include an image pickup chip and a signal processing chip. When the imaging device 100 is configured by an imaging chip and a signal processing chip, a storage unit for storing image data may be provided in the signal processing chip or may be provided separately from the imaging device 100. .

As shown in FIG. 2, the incident light is incident mainly in the positive direction of the Z axis indicated by the white arrow. Further, as shown in the coordinate axes, the left direction of the paper orthogonal to the Z axis is the X axis plus direction, and the front side of the paper orthogonal to the Z axis and X axis is the Y axis plus direction. In the following several figures, the coordinate axes are displayed so that the orientation of each figure can be understood with reference to the coordinate axes in FIG.

The imaging chip 111 is, for example, a CMOS image sensor. Specifically, the imaging chip 111 is a backside illumination type CMOS image sensor. The imaging chip 111 includes a microlens layer 101, a color filter layer 102, a passivation layer 103, a semiconductor layer 106, and a wiring layer 108. The imaging chip 111 is arranged in the order of the microlens layer 101, the color filter layer 102, the passivation layer 103, the semiconductor layer 106, and the wiring layer 108 in the positive Z-axis direction.

The microlens layer 101 has a plurality of microlenses L. The microlens L condenses incident light on the photoelectric conversion unit 104 described later. The color filter layer 102 includes a plurality of color filters F. The color filter layer 102 has a plurality of types of color filters F having different spectral characteristics. Specifically, the color filter layer 102 includes a first filter (R) having a spectral characteristic that mainly transmits red component light and a second filter (Gb, Gr) that has a spectral characteristic that mainly transmits green component light. ) And a third filter (B) having a spectral characteristic that mainly transmits blue component light. In the color filter layer 102, for example, a first filter, a second filter, and a third filter are arranged in a Bayer arrangement. The passivation layer 103 is made of a nitride film or an oxide film, and protects the semiconductor layer 106.

The semiconductor layer 106 includes a photoelectric conversion unit 104 and a readout circuit 105. The semiconductor layer 106 includes a plurality of photoelectric conversion units 104 between a first surface 106a that is a light incident surface and a second surface 106b opposite to the first surface 106a. The semiconductor layer 106 includes a plurality of photoelectric conversion units 104 arranged in the X-axis direction and the Y-axis direction. The photoelectric conversion unit 104 has a photoelectric conversion function of converting light into electric charge. In addition, the photoelectric conversion unit 104 accumulates charges based on the photoelectric conversion signal. The photoelectric conversion unit 104 is, for example, a photodiode. The semiconductor layer 106 includes a readout circuit 105 on the second surface 106b side of the photoelectric conversion unit 104. In the semiconductor layer 106, a plurality of readout circuits 105 are arranged in the X-axis direction and the Y-axis direction. The readout circuit 105 includes a plurality of transistors, reads out image data generated by the electric charges photoelectrically converted by the photoelectric conversion unit 104, and outputs the image data to the wiring layer 108.

The wiring layer 108 has a plurality of metal layers. The metal layer is, for example, an Al wiring, a Cu wiring, or the like. The wiring layer 108 outputs the image data read by the reading circuit 105. The image data is output from the wiring layer 108 to the signal processing chip 112 via the connection unit 109.

Note that the connection unit 109 may be provided for each photoelectric conversion unit 104. Further, the connection unit 109 may be provided for each of the plurality of photoelectric conversion units 104. When the connection unit 109 is provided for each of the plurality of photoelectric conversion units 104, the pitch of the connection units 109 may be larger than the pitch of the photoelectric conversion units 104. In addition, the connection unit 109 may be provided in a peripheral region of the region where the photoelectric conversion unit 104 is disposed.

The signal processing chip 112 has a plurality of signal processing circuits. The signal processing circuit performs signal processing on the image data output from the imaging chip 111. The signal processing circuit includes, for example, an amplifier circuit that amplifies the signal value of the image data, a correlated double sampling circuit that performs noise reduction processing of the image data, and analog / digital (A / D) conversion that converts the analog signal into a digital signal. Circuit etc. A signal processing circuit may be provided for each photoelectric conversion unit 104.

Further, a signal processing circuit may be provided for each of the plurality of photoelectric conversion units 104. The signal processing chip 112 has a plurality of through electrodes 110. The through electrode 110 is, for example, a silicon through electrode. The through electrode 110 connects circuits provided in the signal processing chip 112 to each other. The through electrode 110 may also be provided in the peripheral region of the imaging chip 111 and the memory chip 113. Note that some elements constituting the signal processing circuit may be provided in the imaging chip 111. For example, in the case of an analog / digital conversion circuit, a comparator that compares an input voltage with a reference voltage may be provided in the imaging chip 111, and circuits such as a counter circuit and a latch circuit may be provided in the signal processing chip 112.

The memory chip 113 has a plurality of storage units. The storage unit stores image data that has been subjected to signal processing by the signal processing chip 112. The storage unit is a volatile memory such as a DRAM, for example. A storage unit may be provided for each photoelectric conversion unit 104. In addition, the storage unit may be provided for each of the plurality of photoelectric conversion units 104. The image data stored in the storage unit is output to the subsequent image processing unit.

FIG. 3 is a diagram for explaining the pixel array and the unit area 131 of the imaging chip 111. In particular, a state where the imaging chip 111 is observed from the back surface (imaging surface) side is shown. For example, 20 million or more pixels are arranged in a matrix in the pixel region. In the example of FIG. 3, four adjacent pixels of 2 pixels × 2 pixels form one unit region 131. The grid lines in the figure indicate the concept that adjacent pixels are grouped to form a unit region 131. The number of pixels forming the unit region 131 is not limited to this, and may be about 1000, for example, 32 pixels × 32 pixels, more or less, or one pixel.

As shown in the partially enlarged view of the pixel area, the unit area 131 in FIG. 3 includes a so-called Bayer array composed of four pixels of green pixels Gb, Gr, blue pixels B, and red pixels R. The green pixels Gb and Gr are pixels having a green filter as the color filter F, and receive light in the green wavelength band of incident light. Similarly, the blue pixel B is a pixel having a blue filter as the color filter F and receives light in the blue wavelength band, and the red pixel R is a pixel having a red filter as the color filter F and having a red wavelength band. Receives light.

In the present embodiment, a plurality of blocks are defined so as to include at least one unit region 131 per block. That is, the minimum unit of one block is one unit area 131. As described above, of the possible values for the number of pixels forming one unit region 131, the smallest number of pixels is one pixel. Therefore, when one block is defined in units of pixels, the minimum number of pixels among the number of pixels that can define one block is one pixel. Each block can control pixels included in each block with different control parameters. In each block, all the unit areas 131 in the block, that is, all the pixels in the block are controlled under the same imaging condition. That is, photoelectric conversion signals having different imaging conditions can be acquired between a pixel group included in a certain block and a pixel group included in another block. Examples of the control parameters include a frame rate, a gain, a thinning rate, the number of addition rows or addition columns to which photoelectric conversion signals are added, a charge accumulation time or accumulation count, a digitization bit number (word length), and the like. The imaging device 100 can freely perform not only thinning in the row direction (X-axis direction of the imaging chip 111) but also thinning in the column direction (Y-axis direction of the imaging chip 111). Furthermore, the control parameter may be a parameter in image processing.

FIG. 4 is a diagram for explaining a circuit in the unit region 131. In the example of FIG. 4, one unit region 131 is formed by four adjacent pixels of 2 pixels × 2 pixels. As described above, the number of pixels included in the unit region 131 is not limited to this, and may be 1000 pixels or more, or may be a minimum of 1 pixel. The two-dimensional position of the unit area 131 is indicated by reference signs A to D.

The reset transistor (RST) of the pixel included in the unit region 131 is configured to be turned on and off individually for each pixel. In FIG. 4, a reset wiring 300 for turning on / off the reset transistor of the pixel A is provided, and a reset wiring 310 for turning on / off the reset transistor of the pixel B is provided separately from the reset wiring 300. Similarly, a reset line 320 for turning on and off the reset transistor of the pixel C is provided separately from the

reset lines

300 and 310. A dedicated reset wiring 330 for turning on and off the reset transistor is also provided for the other pixels D.

The pixel transfer transistor (TX) included in the unit region 131 is also configured to be turned on and off individually for each pixel. In FIG. 4, a transfer wiring 302 for turning on / off the transfer transistor of the pixel A, a transfer wiring 312 for turning on / off the transfer transistor of the pixel B, and a transfer wiring 322 for turning on / off the transfer transistor of the pixel C are separately provided. Also for the other pixels D, a dedicated transfer wiring 332 for turning on / off the transfer transistor is provided.

Furthermore, the pixel selection transistor (SEL) included in the unit region 131 is also configured to be turned on and off individually for each pixel. In FIG. 4, a selection wiring 306 for turning on / off the selection transistor of the pixel A, a selection wiring 316 for turning on / off the selection transistor of the pixel B, and a selection wiring 326 for turning on / off the selection transistor of the pixel C are separately provided. Also for the other pixels D, a dedicated selection wiring 336 for turning on and off the selection transistor is provided.

Note that the power supply wiring 304 is commonly connected from the pixel A to the pixel D included in the unit region 131. Similarly, the output wiring 308 is commonly connected to the pixel D from the pixel A included in the unit region 131. Further, the power supply wiring 304 is commonly connected between a plurality of unit regions, but the output wiring 308 is provided for each unit region 131 individually. The load current source 309 supplies current to the output wiring 308. The load current source 309 may be provided on the imaging chip 111 side or may be provided on the signal processing chip 112 side.

By individually turning on and off the reset transistor and the transfer transistor in the unit region 131, the charge accumulation including the charge accumulation start time, the accumulation end time, and the transfer timing is controlled from the pixel A to the pixel D included in the unit region 131. can do. In addition, by individually turning on and off the selection transistors in the unit region 131, the photoelectric conversion signals of the pixels A to D can be output via the common output wiring 308.

Here, a so-called rolling shutter system is known in which charge accumulation is controlled in a regular order with respect to rows and columns for the pixels A to D included in the unit region 131. When a column is designated after selecting a pixel for each row by the rolling shutter method, photoelectric conversion signals are output in the order of “ABCD” in the example of FIG.

Thus, by configuring the circuit with the unit region 131 as a reference, the charge accumulation time can be controlled for each unit region 131. In other words, it is possible to output photoelectric conversion signals at different frame rates between the unit regions 131. Further, in the imaging chip 111, the unit area 131 included in another block is rested while the unit area 131 included in a part of the block is charged (imaged), so that a predetermined block of the imaging chip 111 can be used. Only the imaging can be performed, and the photoelectric conversion signal can be output. Furthermore, it is also possible to switch a block (accumulation control target block) where charge accumulation (imaging) is performed between frames, sequentially perform imaging with different blocks of the imaging chip 111, and output a photoelectric conversion signal.

As described above, the output wiring 308 is provided corresponding to each of the unit areas 131. Since the image pickup device 100 includes the image pickup chip 111, the signal processing chip 112, and the memory chip 113, each chip is arranged in the surface direction by using the electrical connection between the chips using the connection portion 109 for the output wiring 308. The wiring can be routed without increasing the size.

<Block control of image sensor>
In the present embodiment, an imaging condition can be set for each of a plurality of blocks in the imaging device 32a. The control unit 34 (imaging control unit 34c) associates the plurality of regions with the block and causes the imaging to be performed under an imaging condition set for each region.

FIG. 5 is a diagram schematically showing an image of a subject formed on the image sensor 32a of the camera 1. The camera 1 photoelectrically converts the subject image to obtain a live view image before an imaging instruction is given. The live view image refers to a monitor image that is repeatedly imaged at a predetermined frame rate (for example, 60 fps).

The control unit 34 sets the same imaging condition over the entire area of the imaging chip 111 (that is, the entire imaging screen) before the setting unit 34b divides the area. The same imaging condition refers to setting a common imaging condition for the entire imaging screen. For example, even if there is a variation in apex value of less than about 0.3, it is regarded as the same. The imaging conditions set to be the same throughout the imaging chip 111 are determined based on the exposure conditions corresponding to the photometric value of the subject luminance or the exposure conditions manually set by the user.

5, an image including a person 61a, an automobile 62a, a bag 63a, a mountain 64a, and

clouds

65a and 66a is formed on the imaging surface of the imaging chip 111. The person 61a holds the bag 63a with both hands. The automobile 62a stops at the right rear of the person 61a.

<Division of area>
Based on the live view image, the control unit 34 divides the screen of the live view image into a plurality of regions as follows. First, a subject element is detected from the live view image by the object detection unit 34a. The subject element is detected using a known subject recognition technique. In the example of FIG. 5, the object detection unit 34a detects a person 61a, a car 62a, a bag 63a, a mountain 64a, a cloud 65a, and a cloud 66a as subject elements.

Next, the setting unit 34b divides the live view image screen into regions including the subject elements. In the present embodiment, the region including the person 61a is the region 61, the region including the car 62a is the region 62, the region including the bag 63a is the region 63, the region including the mountain 64a is the region 64, and the cloud 65a is included. The region is described as a region 65, and the region including the cloud 66a is described as a region 66.

<Setting imaging conditions for each block>
When the setting unit 34b divides the screen into a plurality of areas, the control unit 34 causes the display unit 35 to display a setting screen as illustrated in FIG. In FIG. 6, a live view image 60a is displayed, and an imaging condition setting screen 70 is displayed on the right side of the live view image 60a.

The setting screen 70 lists frame rate, shutter speed (TV), and gain (ISO) in order from the top as an example of setting items for imaging conditions. The frame rate is the number of frames of a live view image acquired per second or a moving image recorded by the camera 1. Gain is ISO sensitivity. The setting items for the imaging conditions may be added as appropriate in addition to those illustrated in FIG. When all the setting items do not fit in the setting screen 70, other setting items may be displayed by scrolling the setting items up and down.

In the present embodiment, the control unit 34 sets the region selected by the user among the regions divided by the setting unit 34b as a target for setting (changing) the imaging condition. For example, in the camera 1 capable of touch operation, the user taps the display position of the main subject for which the imaging condition is to be set (changed) on the display surface of the display unit 35 on which the live view image 60a is displayed. For example, when the display position of the person 61 a is tapped, the control unit 34 sets the area 61 including the person 61 a in the live view image 60 a as an imaging condition setting (change) target area and emphasizes the outline of the area 61. To display.

In FIG. 6, an area 61 in which the outline is emphasized and displayed (bold display, bright display, display with a different color, display with a broken line, blink display, etc.) indicates an area for which the imaging condition is to be set (changed). . In the example of FIG. 6, it is assumed that a live view image 60a in which the outline of the region 61 is emphasized is displayed. In this case, the region 61 is a target for setting (changing) the imaging condition. For example, in the camera 1 capable of touch operation, when the user taps the shutter speed (TV) display 71, the control unit 34 displays the current shutter speed for the highlighted area (area 61). The set value is displayed on the screen (reference numeral 68).
In the following description, the camera 1 is described on the premise of a touch operation. However, the imaging condition may be set (changed) by operating a button or the like constituting the operation member 36.

When the upper icon 71a or the lower icon 71b of the shutter speed (TV) is tapped by the user, the setting unit 34b increases or decreases the shutter speed display 68 from the current setting value according to the tap operation. An instruction is sent to the imaging unit 32 (FIG. 1) so as to change the imaging condition of the unit area 131 (FIG. 3) of the imaging element 32a corresponding to the displayed area (area 61) in accordance with the tap operation. The decision icon 72 is an operation icon for confirming the set imaging condition. The setting unit 34b performs the setting (change) of the frame rate and gain (ISO) in the same manner as the setting (change) of the shutter speed (TV).

Although the setting unit 34b has been described as setting the imaging condition based on the user's operation, the setting unit 34b is not limited to this. The setting unit 34b may set the imaging condition based on the determination of the control unit 34 without being based on a user operation. For example, when the overexposure or underexposure occurs in the area including the subject element having the maximum luminance or the minimum luminance in the image, the setting unit 34b cancels the overexposure or underexposure based on the determination of the control unit 34. The imaging conditions may be set in.
For the area that is not highlighted (the area other than the area 61), the set imaging conditions are maintained.

Instead of highlighting the outline of the area for which the imaging condition is set (changed), the control unit 34 displays the entire target area brightly, increases the contrast of the entire target area, or displays the entire target area. May be displayed blinking. Further, the target area may be surrounded by a frame. The display of the frame surrounding the target area may be a double frame or a single frame, and the display mode such as the line type, color, and brightness of the surrounding frame may be appropriately changed. In addition, the control unit 34 may display an indication of an area for which an imaging condition is set, such as an arrow, in the vicinity of the target area. The control unit 34 may darkly display a region other than the target region for which the imaging condition is set (changed), or may display a low contrast other than the target region.

As described above, when an image capturing condition for each region is set and a release button (not shown) constituting the operation member 36 or a display (release icon) for instructing start of imaging is operated, the control unit 34 is operated. By controlling the imaging unit 32, imaging is performed under the imaging conditions set for each of the divided areas. The image processing unit 33 performs image processing on the image data acquired by the imaging unit 32. As described above, the image processing can be performed under different image processing conditions for each region.

After the image processing by the image processing unit 33, the recording unit 37 that receives an instruction from the control unit 34 records the image data after the image processing on a recording medium including a memory card (not shown). Thereby, a series of imaging processes is completed.

<Correction process>
As described above, in this embodiment, after the area of the imaging screen is divided by the setting unit 34b, the imaging condition is set (changed) for the area selected by the user or the area determined by the control unit 34. ) Is configured to be possible. When different imaging conditions are set in the divided areas, the control unit 34 performs the following correction process as necessary.

1. When Image Processing is Performed The image processing unit 33 (correction unit 33b) is in the vicinity of a boundary between regions when image processing on image data obtained by applying different imaging conditions between the divided regions is predetermined image processing. Correction processing is performed on the image data positioned at the position as preprocessing for image processing. The predetermined image processing is processing for calculating image data of a target position to be processed in an image with reference to image data at a plurality of reference positions around the target position. For example, pixel defect correction processing, color interpolation Processing, contour enhancement processing, noise reduction processing, and the like are applicable.

The correction process is performed to alleviate discontinuities that occur in the image after image processing due to the difference in imaging conditions between the divided areas. In general, when the target position is located near the boundary of the divided area, the image data in which the same imaging condition as the image data of the target position is applied to the plurality of reference positions around the target position, and the image of the target position Data and image data to which different imaging conditions are applied may be mixed. In the present embodiment, the correction processing is performed so as to suppress the difference between the image data due to the difference in the imaging conditions, rather than referencing the image data at the reference position to which the different imaging conditions are applied as it is to calculate the image data at the target position. Based on the idea that it is preferable to calculate the image data of the target position with reference to the image data of the reference position subjected to the correction process, the correction process is performed as follows.

FIG. 7A is a diagram illustrating a region 80 near the boundary between the region 61 and the region 64 in the live view image 60a. In this example, it is assumed that the first imaging condition is set in an area 61 including at least a person and the second imaging condition is set in an area 64 including a mountain. FIG. 7B is an enlarged view of a region 80 near the boundary of FIG. The image data from the pixels on the image sensor 32a corresponding to the area 61 for which the first imaging condition is set is shown in white, and the image from the pixels on the image sensor 32a corresponding to the area 64 for which the second imaging condition is set. Data is shaded. In FIG. 7B, the image data from the target pixel P is located on the region 61 and in the vicinity of the boundary 81 between the region 61 and the region 64, that is, the boundary portion. Pixels around the target pixel P (eight pixels in this example) included in a predetermined range 90 (for example, 3 × 3 pixels) centered on the target pixel P are set as reference pixels. FIG. 7C is an enlarged view of the target pixel P and the reference pixel. The position of the target pixel P is the target position, and the position of the reference pixel surrounding the target pixel P is the reference position.

The image processing unit 33 (the generation unit 33c) normally performs image processing by directly referring to the image data of the reference pixel without performing correction processing. However, when the imaging condition applied to the target pixel P (referred to as the first imaging condition) is different from the imaging condition applied to the reference pixels around the target pixel P (referred to as the second imaging condition), The correction unit 33b performs correction processing on the image data of the second imaging condition among the image data of the reference pixels as in the following (Example 1) to (Example 3). Then, the generation unit 33c performs image processing for calculating the image data of the target pixel P with reference to the image data of the reference pixel after the correction processing. In FIG. 7C, the image data output from the pixels indicated by white background is image data under the first imaging condition, and the image data output from the pixels indicated by diagonal lines is image data under the second imaging condition.

(Example 1)
For example, the image processing unit 33 (correction unit 33b) differs only in ISO sensitivity between the first imaging condition and the second imaging condition, and the ISO sensitivity in the first imaging condition is 100, and the ISO sensitivity in the second imaging condition. Is 800/100, the correction processing is applied to the image data of the second imaging condition in the image data of the reference pixel. Thereby, the difference between the image data due to the difference in the imaging conditions is reduced.
Note that when the amount of incident light on the target pixel P and the amount of incident light on the reference pixel are the same, the difference in image data is reduced, but the amount of incident light on the target pixel P and the amount of incident light on the reference pixel are originally different. In some cases, the difference in image data may not be reduced. The same applies to the examples described later.

(Example 2)
The image processing unit 33 (correction unit 33b), for example, differs only in shutter speed between the first imaging condition and the second imaging condition, and the shutter speed of the first imaging condition is 1/1000 second, and the second imaging condition When the shutter speed is 1/100 second, 1/1000/1/100 = 1/10 is applied as the correction processing to the image data of the second imaging condition in the image data of the reference pixel. Thereby, the difference between the image data due to the difference in the imaging conditions is reduced.

(Example 3)
For example, the image processing unit 33 (correction unit 33b) differs only in the frame rate between the first imaging condition and the second imaging condition (the charge accumulation time is the same), and the frame rate of the first imaging condition is 30 fps. When the frame rate of the second imaging condition is 60 fps, the frame image acquired under the first imaging condition (30 fps) and the acquisition start timing for the image data of the second imaging condition (60 fps) out of the image data of the reference pixels. Employing image data of a close frame image is a correction process. Thereby, the difference between the image data due to the difference in the imaging conditions is reduced.
It should be noted that, based on a plurality of previous and subsequent frame images acquired under the second imaging condition (60 fps), interpolation calculation is performed on the frame image acquired under the first imaging condition (30 fps) and the frame image whose acquisition start timing is close. This may be a correction process.

On the other hand, the image processing unit 33 (correction unit 33b) captures an imaging condition (first imaging condition) applied to the pixel of interest P and an imaging condition (first image) applied to all reference pixels around the pixel of interest P. 2), the correction processing is not performed on the image data of the reference pixel. That is, the generation unit 33c performs image processing for calculating the image data of the target pixel P by referring to the image data of the reference pixel as it is.
As described above, even if there are some differences in the imaging conditions, the imaging conditions are regarded as the same.

<Example of image processing>
An example of image processing with correction processing will be described.
(1) Pixel Defect Correction Process In the present embodiment, the pixel defect correction process is one of image processes performed during imaging. In general, the image pickup element 32a, which is a solid-state image pickup element, may produce pixel defects in the manufacturing process or after manufacturing, and output abnormal level image data. Therefore, the image processing unit 33 (the generation unit 33c) corrects the image data output from the pixel in which the pixel defect has occurred, thereby making the image data in the pixel position in which the pixel defect has occurred inconspicuous.

An example of pixel defect correction processing will be described. For example, the image processing unit 33 (the generation unit 33c) sets a pixel at a pixel defect position recorded in advance in a non-illustrated non-volatile memory in an image of one frame as a target pixel P (processing target pixel), and the target pixel P Pixels around the pixel of interest P (eight pixels in this example) included in a predetermined range 90 (for example, 3 × 3 pixels) centering on the pixel are used as reference pixels.

The image processing unit 33 (the generation unit 33c) calculates the maximum value and the minimum value of the image data in the reference pixel. When the image data output from the target pixel P exceeds these maximum value or minimum value, the image processing unit 33 (the generation unit 33c) starts from the target pixel P. Max and Min filter processing is performed to replace the output image data with the maximum value or the minimum value. Such a process is performed for all pixel defects whose position information is recorded in a non-volatile memory (not shown).

In the present embodiment, the image processing unit 33 (correction unit 33b) determines whether the reference pixel includes a pixel to which a second imaging condition different from the first imaging condition applied to the target pixel P is included. Correction processing is performed on image data to which two imaging conditions are applied. Thereafter, the image processing unit 33 (generation unit 33c) performs the Max and Min filter processing described above.

(2) Color Interpolation Processing In the present embodiment, color interpolation processing is one of image processing performed at the time of imaging. As illustrated in FIG. 3, in the imaging chip 111 of the imaging device 100, green pixels Gb and Gr, a blue pixel B, and a red pixel R are arranged in a Bayer array. The image processing unit 33 (the generation unit 33c) lacks image data having a color component different from the color component of the color filter F arranged at each pixel position. Color interpolation processing for generating component image data is performed.

An example of color interpolation processing will be described. FIG. 8A is a diagram illustrating the arrangement of image data output from the image sensor 32a. Corresponding to each pixel position, it has one of R, G, and B color components according to the rules of the Bayer array.
<G color interpolation>
First, general G color interpolation will be described. The image processing unit 33 (generation unit 33c) that performs the G color interpolation refers to the image data of the four G color components at the reference positions around the target position, with the positions of the R color component and the B color component as the target position in order. Thus, image data of the G color component at the position of interest is generated. For example, the G color component at the target position indicated by the thick frame in FIG. 8B (second row and second column counted from the upper left position. Similarly, the target position is counted from the upper left position). When generating the image data, the four G color component image data G1 to G4 located in the vicinity of the target position (second row, second column) are referred to. The image processing unit 33 (generation unit 33c) sets, for example, (aG1 + bG2 + cG3 + dG4) / 4 as G color component image data at the target position (second row, second column). Note that a to d are weighting coefficients provided according to the distance between the reference position and the target position and the image structure.

Next, the G color interpolation of the present embodiment will be described. 8 (a) to 8 (c), the first imaging condition is applied to the left and upper regions with respect to the thick line, and the second imaging condition is applied to the right and lower regions with respect to the thick line. It shall be. In FIGS. 8A to 8C, the first imaging condition and the second imaging condition are different. Also, the G color component image data G1 to G4 in FIG. 8B are reference positions for image processing of the pixel at the target position (second row and second column). In FIG. 8B, the first imaging condition is applied to the target position (second row, second column). Among the reference positions, the first imaging condition is applied to the image data G1 to G3. Of the reference positions, the second imaging condition is applied to the image data G4. Therefore, the image processing unit 33 (correction unit 33b) performs correction processing on the image data G4. Thereafter, the image processing unit 33 (generation unit 33c) calculates the image data of the G color component at the position of interest (second row and second column).

The image processing unit 33 (the generation unit 33c) generates image data of the G color component at the position of the B color component and the position of the R color component in FIG. In addition, the image data of the G color component can be obtained at each pixel position.

<R color interpolation>
FIG. 9A is a diagram obtained by extracting R color component image data from FIG. The image processing unit 33 (generating unit 33c) performs color difference shown in FIG. 9B based on the G color component image data shown in FIG. 8C and the R color component image data shown in FIG. Image data of the component Cr is calculated.

First, general interpolation of the color difference component Cr will be described. For example, when the image processing unit 33 (the generation unit 33c) generates image data of the color difference component Cr at the target position indicated by the thick frame (second row and second column) in FIG. 9B, the target position (second row) Reference is made to the image data Cr1 to Cr4 of the four color difference components located in the vicinity of the second column). The image processing unit 33 (generation unit 33c) sets, for example, (eCr1 + fCr2 + gCr3 + hCr4) / 4 as image data of the color difference component Cr at the target position (second row and second column). Note that e to h are weighting coefficients provided according to the distance between the reference position and the target position and the image structure.

Similarly, for example, when the image processing unit 33 (the generation unit 33c) generates image data of the color difference component Cr at the position of interest indicated by the thick frame (second row and third column) of FIG. Reference is made to the image data Cr2, Cr4 to Cr6 of the four color difference components located in the vicinity of the second row and the third column). The image processing unit 33 (generation unit 33c) sets, for example, (qCr2 + rCr4 + sCr5 + tCr6) / 4 as image data of the color difference component Cr at the target position (second row, third column). Note that q to t are weighting coefficients provided according to the distance between the reference position and the target position and the image structure. Thus, image data of the color difference component Cr is generated for each pixel position.

Next, interpolation of the color difference component Cr according to the present embodiment will be described. In FIG. 9A to FIG. 9C, for example, the first imaging condition is applied to the left and upper regions with respect to the thick line, and the second imaging condition is applied to the right and lower regions with respect to the thick line. It shall be applied. 9A to 9C, the first imaging condition and the second imaging condition are different. In FIG. 9B, the position indicated by the thick frame (second row, second column) is the target position of the color difference component Cr. Further, the color difference component image data Cr1 to Cr4 in FIG. 9B are reference positions for image processing of the pixel at the target position (second row and second column). In FIG. 9B, the first imaging condition is applied to the target position (second row, second column). Among the reference positions, the first imaging condition is applied to the image data Cr1, Cr3, and Cr4. Of the reference positions, the second imaging condition is applied to the image data Cr2. Therefore, the image processing unit 33 (correction unit 33b) performs correction processing on the image data Cr2. Thereafter, the image processing unit 33 (generation unit 33c) calculates the image data of the color difference component Cr at the position of interest (second row and second column).
In FIG. 9C, the position indicated by the thick frame (second row, third column) is the target position of the color difference component Cr. Also, the color difference component image data Cr2, Cr4, Cr5, and Cr6 in FIG. 9C are reference positions for image processing of the pixel at the target position (second row and third column). In FIG. 9C, the second imaging condition is applied to the target position (second row, third column). Among the reference positions, the first imaging condition is applied to the image data Cr4 and Cr5. Of the reference positions, the second imaging condition is applied to the image data Cr2 and Cr6. Therefore, the image processing unit 33 (correction unit 33b) performs correction processing on the image data Cr4 and Cr5, respectively. Thereafter, the image processing unit 33 (generating unit 33c) calculates image data of the color difference component Cr at the position of interest (second row and third column).

The image processing unit 33 (generation unit 33c) obtains the image data of the color difference component Cr at each pixel position, and then adds the image data of the G color component shown in FIG. 8C in correspondence with each pixel position. Thus, R color component image data can be obtained at each pixel position.

FIG. 10A is a diagram in which image data of the B color component is extracted from FIG. The image processing unit 33 (generation unit 33c) performs the color difference shown in FIG. 10B based on the G color component image data shown in FIG. 8C and the B color component image data shown in FIG. Image data of the component Cb is calculated.

First, general interpolation of the color difference component Cb will be described. For example, when the image processing unit 33 (the generation unit 33c) generates image data of the color difference component Cb at the target position indicated by the thick frame (third row, third column) in FIG. Reference is made to the image data Cb1 to Cb4 of the four color difference components located in the vicinity of the third column). The image processing unit 33 (generation unit 33c) sets, for example, (uCb1 + vCb2 + wCb3 + xCb4) / 4 as the image data of the color difference component Cb at the target position (third row, third column). Note that u to x are weighting coefficients provided according to the distance between the reference position and the target position and the image structure.

Similarly, when the image processing unit 33 (the generation unit 33c) generates image data of the color difference component Cb at the target position indicated by, for example, the thick frame (third row and fourth column) in FIG. Reference is made to the image data Cb2, Cb4 to Cb6 of the four color difference components located in the vicinity of the third row and the fourth column). The image processing unit 33 (generation unit 33c) sets, for example, (yCb2 + zCb4 + αCb5 + βCb6) / 4 as image data of the color difference component Cb at the target position (third row, fourth column). Note that y, z, α, and β are weighting coefficients provided according to the distance between the reference position and the target position and the image structure. Thus, image data of the color difference component Cb is generated for each pixel position.

Next, the interpolation of the color difference component Cb according to the present embodiment will be described. 10 (a) to 10 (c), for example, the first imaging condition is applied to the left and upper regions with respect to the thick line, and the second imaging condition is applied to the right and lower regions with respect to the thick line. It shall be applied. In FIGS. 10A to 10C, the first imaging condition and the second imaging condition are different. In FIG. 10B, the position indicated by the thick frame (third row, third column) is the target position of the color difference component Cb. Also, the color difference component image data Cb1 to Cb4 in FIG. 10B is a reference position for image processing of the pixel at the target position (third row, third column). In FIG. 10B, the second imaging condition is applied to the target position (third row, third column). Among the reference positions, the first imaging condition is applied to the image data Cb1 and Cb3. Of the reference positions, the second imaging condition is applied to the image data Cb2 and Cb4. Therefore, the image processing unit 33 (correction unit 33b) performs correction processing on the data Cb1 and Cb3, respectively. Thereafter, the image processing unit 33 (generation unit 33c) calculates the image data of the color difference component Cb at the target position (third row, third column).
In FIG. 10C, the position indicated by the thick frame (third row, fourth column) is the target position of the color difference component Cb. Further, the color difference component image data Cb2 and Cb4 to Cb6 in FIG. 10C are reference positions for image processing of the pixel at the target position (third row, fourth column). In FIG. 10C, the second imaging condition is applied to the position of interest (third row, fourth column). Further, the second imaging condition is applied to the image data Cb2 and Cb4 to Cb6 at all reference positions. Therefore, the image processing unit 33 (generation unit 33c) refers to the image data Cb2 and Cb4 to Cb6 at the reference position that has not been subjected to the correction process by the image processing unit 33 (correction unit 33b), and the target position (three rows). The image data of the color difference component Cb in the (fourth column) is calculated.

The image processing unit 33 (the generation unit 33c) obtains the image data of the color difference component Cb at each pixel position, and then adds the image data of the G color component shown in FIG. 8C in correspondence with each pixel position. Thus, image data of the B color component can be obtained at each pixel position.
In the “G color interpolation”, for example, when generating G color component image data at the target position indicated by the thick frame (second row, second column) in FIG. The four G color component image data G1 to G4 are referred to, but the number of G color component image data to be referred to may be changed depending on the image structure. For example, when the image near the target position has similarity in the vertical direction (for example, a vertical stripe pattern), only the image data above and below the target position (G1 and G2 in FIG. 8B) are used. Perform interpolation processing. Further, for example, when the image near the target position has a similarity in the horizontal direction (for example, a horizontal stripe pattern), only the left and right image data (G3 and G4 in FIG. 8B) of the target position are used. To perform interpolation processing. In these cases, the image data G4 that is corrected by the correction unit 33b may or may not be used.

(3) Outline Enhancement Process An example of the outline enhancement process will be described. The image processing unit 33 (generation unit 33c) performs, for example, a known linear filter calculation using a kernel of a predetermined size centered on the pixel of interest P (processing target pixel) in one frame image. When the kernel size of a sharpening filter that is an example of a linear filter is N × N pixels, the position of the target pixel P is the target position, and the positions of (N ² −1) reference pixels surrounding the target pixel P are referred to. Position.
The kernel size may be N × M pixels.

The image processing unit 33 (generation unit 33c) performs a filter process for replacing the image data in the target pixel P with a linear filter calculation result on each horizontal line, for example, from the upper horizontal line to the lower horizontal line of the frame image. This is done while shifting the pixel of interest from left to right.

In the present embodiment, the image processing unit 33 (correction unit 33b) determines whether the reference pixel includes a pixel to which a second imaging condition different from the first imaging condition applied to the target pixel P is included. Correction processing is performed on image data to which two imaging conditions are applied. Thereafter, the image processing unit 33 (generation unit 33c) performs the linear filter processing described above.

(4) Noise reduction processing An example of noise reduction processing will be described. The image processing unit 33 (generation unit 33c) performs, for example, a known linear filter calculation using a kernel of a predetermined size centered on the pixel of interest P (processing target pixel) in one frame image. When the kernel size of the smoothing filter which is an example of the linear filter is N × N pixels, the position of the target pixel P is the target position, and the positions of the (N ² −1) reference pixels surrounding the target pixel P are referred to. Position.
The kernel size may be N × M pixels.

2. When performing focus detection processing The control unit 34 (AF calculation unit 34d) performs focus detection processing using signal data (image data) corresponding to a predetermined position (focus detection position) on the imaging screen. The control unit 34 (AF calculation unit 34d) sets different imaging conditions for the divided areas, and when the focus detection position of the AF operation is located at the boundary portion of the divided areas, the focus of at least one area is set. Correction processing is performed on the signal data for detection as preprocessing for focus detection processing.

The correction process is performed in order to suppress a decrease in the accuracy of the focus detection process due to the difference in imaging conditions between areas of the imaging screen divided by the setting unit 34b. For example, when the focus detection signal data at the focus detection position for detecting the image shift amount (phase difference) in the image is located near the boundary of the divided areas, different imaging conditions are included in the focus detection signal data. Applied signal data may be mixed. In the present embodiment, the correction process is performed so as to suppress the difference between the signal data due to the difference in the imaging conditions, rather than detecting the image shift amount (phase difference) using the signal data to which the different imaging conditions are applied as it is. Based on the idea that it is preferable to detect the amount of image shift (phase difference) using the applied signal data, correction processing is performed as follows.

<Example of focus detection processing>
An example of focus detection processing that involves correction processing will be described. In the AF operation of the present embodiment, for example, the subject corresponding to the focus detection position selected by the user from a plurality of focus detection positions on the imaging screen is focused. The control unit 34 (AF calculation unit 34 d (generation unit)) detects image shift amounts (phase differences) of a plurality of subject images due to light beams that have passed through different pupil regions of the imaging optical system 31, whereby the imaging optical system 31. The defocus amount of is calculated. The control unit 34 (AF calculation unit 34d) moves the focus lens of the imaging optical system 31 to a position where the defocus amount is zero (allowable value or less), that is, a focus position.

FIG. 11 is a diagram illustrating the position of the focus detection pixel on the imaging surface of the imaging device 32a. In the present embodiment, focus detection pixels are discretely arranged along the X-axis direction (horizontal direction) of the imaging chip 111. In the example of FIG. 11, 15 focus detection pixel lines 160 are provided at a predetermined interval. The focus detection pixels constituting the focus detection pixel line 160 output a photoelectric conversion signal for focus detection. In the imaging chip 111, normal imaging pixels are provided at pixel positions other than the focus detection pixel line 160. The imaging pixel outputs a live view image or a photoelectric conversion signal for recording.

FIG. 12 is an enlarged view of a part of the focus detection pixel line 160 corresponding to the focus detection position 80A shown in FIG. In FIG. 12, a red pixel R, a green pixel G (Gb, Gr), and a blue pixel B, a focus detection pixel S1, and a focus detection pixel S2 are illustrated. The red pixel R, the green pixel G (Gb, Gr), and the blue pixel B are arranged according to the rules of the Bayer arrangement described above.

The square area illustrated for the red pixel R, the green pixel G (Gb, Gr), and the blue pixel B indicates the light receiving area of the imaging pixel. Each imaging pixel receives a light beam passing through the exit pupil of the imaging optical system 31 (FIG. 1). That is, the red pixel R, the green pixel G (Gb, Gr), and the blue pixel B each have a square-shaped mask opening, and light passing through these mask openings reaches the light-receiving portion of the imaging pixel. .

The shapes of the light receiving regions (mask openings) of the red pixel R, the green pixel G (Gb, Gr), and the blue pixel B are not limited to a quadrangle, and may be, for example, a circle.

The semicircular region exemplified for the focus detection pixel S1 and the focus detection pixel S2 indicates a light receiving region of the focus detection pixel. That is, the focus detection pixel S1 has a semicircular mask opening on the left side of the pixel position in FIG. 12, and the light passing through the mask opening reaches the light receiving portion of the focus detection pixel S1. On the other hand, the focus detection pixel S2 has a semicircular mask opening on the right side of the pixel position in FIG. 12, and the light passing through the mask opening reaches the light receiving portion of the focus detection pixel S2. As described above, the focus detection pixel S1 and the focus detection pixel S2 respectively receive a pair of light beams passing through different areas of the exit pupil of the imaging optical system 31 (FIG. 1).

Note that the position of the focus detection pixel line 160 in the imaging chip 111 is not limited to the position illustrated in FIG. Further, the number of focus detection pixel lines 160 is not limited to the example of FIG. Further, the shape of the mask opening in the focus detection pixel S1 and the focus detection pixel S2 is not limited to a semicircular shape. For example, a rectangular light receiving region (mask opening) in the imaging pixel R, the imaging pixel G, and the imaging pixel B is used. Part) may be a rectangular shape divided in the horizontal direction.

Further, the focus detection pixel line 160 in the imaging chip 111 may be a line in which focus detection pixels are arranged along the Y-axis direction (vertical direction) of the imaging chip 111. An imaging element in which imaging pixels and focus detection pixels are two-dimensionally arranged as shown in FIG. 12 is known, and detailed illustration and description of these pixels are omitted.

In the example of FIG. 12, the configuration in which the focus detection pixels S1 and S2 each receive one of the pair of focus detection light beams, the so-called 1PD structure, has been described. Instead of this, the focus detection pixels may be configured to receive both of a pair of light beams for focus detection, that is, a so-called 2PD structure. With the 2PD structure, the photoelectric conversion signal obtained by the focus detection pixel can be used as a recording photoelectric conversion signal.

The control unit 34 (AF calculation unit 34d) passes through different regions of the imaging optical system 31 (FIG. 1) based on the focus detection photoelectric conversion signals output from the focus detection pixel S1 and the focus detection pixel S2. An image shift amount (phase difference) between the pair of images by the pair of light beams is detected. Then, the defocus amount is calculated based on the image shift amount (phase difference). Such defocus amount calculation by the pupil division phase difference method is well known in the field of cameras, and thus detailed description thereof is omitted.

It is assumed that the focus detection position 80A (FIG. 11) is selected by the user at a position corresponding to the region 80 near the boundary of the region 61 in the live view image 60a illustrated in FIG. FIG. 13 is an enlarged view of the focus detection position 80A. White pixels indicate that the first imaging condition is set, and shaded pixels indicate that the second imaging condition is set. In FIG. 13, the position surrounded by the frame 170 corresponds to the focus detection pixel line 160 (FIG. 11).

The control unit 34 (AF calculation unit 34d) normally performs the focus detection process using the signal data from the focus detection pixels indicated by the frame 170 without performing the correction process. However, when the signal data surrounded by the frame 170 includes signal data to which the first imaging condition is applied and signal data to which the second imaging condition is applied, the control unit 34 (AF calculation unit 34d) Correction processing is performed on the signal data of the second imaging condition among the signal data surrounded by 170 as in the following (Example 1) to (Example 3). Then, the control unit 34 (AF calculation unit 34d) performs focus detection processing using the signal data after the correction processing.

(Example 1)
For example, the control unit 34 (AF calculation unit 34d) differs only in ISO sensitivity between the first imaging condition and the second imaging condition, the ISO sensitivity of the first imaging condition is 100, and the ISO sensitivity of the second imaging condition. Is 800/100, the correction processing is applied to the signal data of the second imaging condition. Thereby, the difference between the signal data due to the difference in the imaging conditions is reduced.
Note that when the amount of incident light to the pixel to which the first imaging condition is applied and the amount of incident light to the pixel to which the second imaging condition is applied are the same, the difference in the signal data is reduced. When the amount of incident light on the applied pixel is different from the amount of incident light on the pixel to which the second imaging condition is applied, the difference in signal data may not be reduced. The same applies to the examples described later.

(Example 2)
For example, the control unit 34 (AF calculation unit 34d) differs only in the shutter speed between the first imaging condition and the second imaging condition, and the shutter speed of the first imaging condition is 1/1000 second. When the shutter speed is 1/100 second, 1/1000/1/100 = 1/10 is applied to the signal data of the second imaging condition as a correction process. Thereby, the difference between the signal data due to the difference in the imaging conditions is reduced.

(Example 3)
For example, the control unit 34 (AF calculation unit 34d) differs only in the frame rate between the first imaging condition and the second imaging condition (the charge accumulation time is the same), and the frame rate of the first imaging condition is 30 fps. When the frame rate of the second imaging condition is 60 fps, the signal data of the frame image acquired at the first imaging condition (30 fps) and the frame image having the acquisition start timing close to the signal data of the second imaging condition (60 fps) are adopted. This is the correction process. Thereby, the difference between the signal data due to the difference in the imaging conditions is reduced.
In addition, based on a plurality of previous and subsequent frame images acquired under the second imaging condition (60 fps), interpolation calculation is performed on the signal data of the frame image acquired under the first imaging condition (30 fps) and the acquisition start timing is similar. This may be a correction process.

On the other hand, the control unit 34 (AF calculation unit 34d) does not perform the correction process when the imaging conditions applied in the signal data surrounded by the frame 170 are the same. That is, the control unit 34 (AF calculation unit 34d) performs focus detection processing using the signal data from the focus detection pixels indicated by the frame 170 as they are.

As described above, even if there are some differences in the imaging conditions, the imaging conditions are regarded as the same.
In the above example, the example in which the correction process is performed on the signal data on the second imaging condition in the signal data based on the first imaging condition. However, the signal data on the first imaging condition in the signal data is described. On the other hand, correction processing may be performed according to the second imaging condition.
Whether the control unit 34 (AF calculation unit 34d) performs the correction process on the signal data of the first imaging condition or the signal data of the second imaging condition is determined based on, for example, ISO sensitivity May be determined. When the ISO sensitivity differs between the first imaging condition and the second imaging condition, if the signal data obtained under the imaging condition with the higher ISO sensitivity is not saturated, the imaging condition with the lower ISO sensitivity was obtained. It is desirable to perform correction processing on the signal data. That is, when the ISO sensitivity differs between the first imaging condition and the second imaging condition, it is desirable to correct the darker signal data so as to reduce the difference from the brighter signal data.

Furthermore, by performing correction processing on the signal data of the first imaging condition and the signal data of the second imaging condition in the signal data, the difference between the two signal data after the correction processing is reduced. May be.

In the above description, the focus detection process using the pupil division phase difference method is exemplified. However, in the case of the contrast detection method in which the focus lens of the imaging optical system 31 is moved to the in-focus position based on the contrast of the subject image. Can be done in the same way.

When the contrast detection method is used, the control unit 34 moves the focus lens of the imaging optical system 31 and outputs the signal output from the imaging pixel of the imaging element 32a corresponding to the focus detection position at each position of the focus lens. A known focus evaluation value calculation is performed based on the data. Then, the position of the focus lens that maximizes the focus evaluation value is obtained as the focus position.

The control unit 34 normally performs focus evaluation value calculation using the signal data output from the imaging pixels corresponding to the focus detection position without performing correction processing. However, when the signal data corresponding to the focus detection position includes signal data to which the first imaging condition is applied and signal data to which the second imaging condition is applied, the control unit 34 corresponds to the focus detection position. Of the signal data to be processed, the correction processing as described above is performed on the signal data of the second imaging condition. And the control part 34 performs a focus evaluation value calculation using the signal data after a correction process.

3. FIG. 14A illustrates a template image representing an object to be detected, and FIG. 14B illustrates a live view image 60 (a) and a search range 190. It is a figure to do. The control unit 34 (object detection unit 34a) detects an object (for example, a bag 63a which is one of the subject elements in FIG. 5) from the live view image. The control unit 34 (the object detection unit 34a) may set the range in which the object is detected as the entire range of the live view image 60a. However, in order to reduce the detection process, a part of the live view image 60a is set as the search range 190. Also good.

The control unit 34 (the object detection unit 34a) sets at least different imaging conditions between the divided regions, and when the search range 190 includes a boundary of the divided regions, an image of at least one region in the search range 190 Correction processing is performed on the data as preprocessing of subject detection processing.

The correction process is performed in order to suppress a decrease in accuracy of the subject element detection process due to a difference in imaging conditions between areas of the imaging screen divided by the setting unit 34b. In general, when the search range 190 used for detecting the subject element includes a boundary of divided areas, image data to which different imaging conditions are applied may be mixed in the image data of the search range 190. In the present embodiment, image data that has been subjected to correction processing so as to suppress differences between image data due to differences in imaging conditions is used rather than detecting subject elements using image data to which different imaging conditions are applied as they are. Based on the idea that it is preferable to use this method to detect the subject element, correction processing is performed as follows.

A case will be described in which the bag 63a which is the belonging of the person 61a is detected in the live view image 60a illustrated in FIG. The control unit 34 (object detection unit 34a) sets the search range 190 in the vicinity of the region including the person 61a. In addition, you may set the area | region 61 containing the person 61a as a search range.

When the search range 190 is not divided by two regions having different imaging conditions, the control unit 34 (the object detection unit 34a) uses the image data constituting the search range 190 as it is without performing correction processing. Perform detection processing. However, if image data in the search range 190 includes image data to which the first imaging condition is applied and image data to which the second imaging condition is applied, the control unit 34 (object detection unit 34a) Then, correction processing is performed as in the above (Example 1) to (Example 3) as the case where the focus detection processing is performed on the image data of the second imaging condition in the image data in the search range 190. Then, the control unit 34 (object detection unit 34a) performs subject detection processing using the image data after the correction processing.
As described above, even if there are some differences in the imaging conditions, the imaging conditions are regarded as the same.
In the above example, the example in which the correction process is performed on the image data on the second imaging condition in the image data based on the first imaging condition. However, the image data on the first imaging condition in the image data is described. On the other hand, correction processing may be performed according to the second imaging condition.

The above-described correction processing for the image data in the search range 190 may be applied to a search range used for detecting a specific subject such as a human face or an area used for determination of an imaging scene.

The correction processing for the image data of the search range 190 described above is not limited to the search range used in the pattern matching method using the template image, but also in the search range when detecting the feature amount based on the color or edge of the image. You may apply similarly.

Further, by performing a known template matching process using image data of a plurality of frames having different acquisition times, a region similar to the tracking target in the previously acquired frame image is searched from the frame image acquired later. You may apply to the tracking process of a mobile body. In this case, the control unit 34, when the image data to which the first imaging condition is applied and the image data to which the second imaging condition is applied coexist in the search range set in the frame image acquired later. Then, the correction processing is performed on the image data of the second imaging condition in the image data of the search range as described above (Example 1) to (Example 3). And the control part 34 performs a tracking process using the image data after a correction process.

The same applies to the case where a known motion vector is detected using image data of a plurality of frames having different acquisition times. When the image data to which the first imaging condition is applied and the image data to which the second imaging condition is applied are mixed in the detection area used for detecting the motion vector, the control unit 34 detects the motion vector. Correction processing is performed as described above (Example 1) to (Example 3) on the image data of the second imaging condition in the image data of the region. And the control part 34 detects a motion vector using the image data after a correction process.

4). When setting the imaging conditions When the control unit 34 (setting unit 34b) divides the area of the imaging screen and sets different imaging conditions between the divided areas, newly performs photometry and determines the exposure conditions Then, correction processing is performed as preprocessing for setting the exposure condition on the image data of at least one region.

The correction process is performed in order to suppress a decrease in accuracy of the process for determining the exposure condition due to the difference in the imaging condition between the areas of the imaging screen divided by the setting unit 34b. For example, when the photometric range set in the center of the imaging screen includes the boundary of the divided areas, image data to which different imaging conditions are applied may be mixed in the photometric range image data. In the present embodiment, image data that has been subjected to correction processing to suppress differences between image data due to differences in imaging conditions is used rather than performing exposure calculation processing using image data to which different imaging conditions are applied as it is. Based on the idea that it is preferable to perform exposure calculation processing, correction processing is performed as follows.

When the photometric range is not divided by a plurality of regions having different imaging conditions, the control unit 34 (setting unit 34b) performs exposure calculation processing using the image data constituting the photometric range as it is without performing correction processing. Do. However, if the image data to which the first imaging condition is applied and the image data to which the second imaging condition is applied are mixed in the image data in the photometric range, the control unit 34 (setting unit 34b) Correction processing is performed as in the above-described (Example 1) to (Example 3) as the case where the focus detection process and the subject detection process are performed on the image data of the second imaging condition in the range of image data. Then, the control unit 34 (setting unit 34b) performs an exposure calculation process using the image data after the correction process.
As described above, even if there are some differences in the imaging conditions, the imaging conditions are regarded as the same.
In the above example, the example in which the correction process is performed on the image data on the second imaging condition in the image data based on the first imaging condition. However, the image data on the first imaging condition in the image data is described. On the other hand, correction processing may be performed according to the second imaging condition.

Not only the photometric range when performing the exposure calculation process described above, but also the photometric (colorimetric) range used when determining the white balance adjustment value and the necessity of emission of the auxiliary photographing light by the light source that emits the auxiliary photographing light are determined. The same applies to the photometric range performed at the time, and further to the photometric range performed at the time of determining the light emission amount of the photographing auxiliary light by the light source.

Further, when the readout resolution of the photoelectric conversion signal is made different between areas obtained by dividing the imaging screen, the same applies to the area used for determination of the imaging scene performed when determining the readout resolution for each area. it can.

<Description of flowchart>
FIG. 15 is a flowchart for explaining the flow of processing for setting an imaging condition for each area and imaging. When the main switch of the camera 1 is turned on, the control unit 34 activates a program that executes the process shown in FIG. In step S10, the control unit 34 causes the display unit 35 to start live view display, and proceeds to step S20.

Specifically, the control unit 34 instructs the imaging unit 32 to start acquiring a live view image, and causes the display unit 35 to sequentially display the acquired live view image. As described above, at this time, the same imaging condition is set for the entire imaging chip 111, that is, the entire screen.
When the setting for performing the AF operation is performed during live view display, the control unit 34 (AF calculation unit 34d) performs focus detection processing to focus the subject element corresponding to the predetermined focus detection position. The AF operation to be adjusted is controlled. The AF calculation unit 34d performs the focus detection process after performing the correction process as necessary.
If the setting for performing the AF operation is not performed during live view display, the control unit 34 (AF calculation unit 34d) performs the AF operation when the AF operation is instructed later.

In step S20, the control unit 34 (object detection unit 34a) detects the subject element from the live view image, and proceeds to step S30. The object detection unit 34a performs the subject detection process after performing the correction process as necessary. In step S30, the control unit 34 (setting unit 34b) divides the screen of the live view image into regions including subject elements, and proceeds to step S40.

In step S 40, the control unit 34 displays an area on the display unit 35. As illustrated in FIG. 6, the control unit 34 highlights an area that is a target for setting (changing) the imaging condition among the divided areas. In addition, the control unit 34 displays the imaging condition setting screen 70 on the display unit 35 and proceeds to step S50.
When the display position of another main subject on the display screen is tapped with the user's finger, the control unit 34 sets an area including the main subject as an area for setting (changing) the imaging condition. Change and highlight.

In step S50, the control unit 34 determines whether an AF operation is necessary. The control unit 34, for example, when the focus adjustment state changes due to the movement of the subject, when the position of the focus detection position is changed by a user operation, or when execution of an AF operation is instructed by a user operation Then, affirmative determination is made in step S50, and the process proceeds to step S70. When the focus adjustment state does not change, the position of the focus detection position is not changed by the user operation, and the execution of the AF operation is not instructed by the user operation, the control unit 34 makes a negative determination in step S50 and proceeds to step 60. move on.

In step S70, the control unit 34 performs the AF operation and returns to step S40. The AF calculation unit 34d performs the focus detection process, which is an AF operation, after performing the correction process as necessary. The control unit 34 that has returned to step S40 repeats the same processing as described above based on the live view image acquired after the AF operation.

In step S60, the control unit 34 (setting unit 34b) sets an imaging condition for the highlighted area in accordance with a user operation, and proceeds to step S80. Note that the display transition of the display unit 35 and the setting of the imaging conditions according to the user operation in step S60 are as described above. The control unit 34 (setting unit 34b) performs exposure calculation processing after performing the above correction processing as necessary.

In step S80, the control unit 34 determines whether there is an imaging instruction. When a release button (not shown) constituting the operation member 36 or a display icon for instructing imaging is operated, the control unit 34 makes a positive determination in step S80 and proceeds to step S90. When the imaging instruction is not performed, the control unit 34 makes a negative determination in step S80 and returns to step S60.

In step S90, the control unit 34 performs predetermined imaging processing. That is, the imaging control unit 34c controls the imaging element 32a so as to perform imaging under the imaging conditions set for each region, and the process proceeds to step S100.

In step S100, the control unit 34 (imaging control unit 34c) sends an instruction to the image processing unit 33, performs predetermined image processing on the image data obtained by the imaging, and proceeds to step S110. Image processing includes the pixel defect correction processing, color interpolation processing, contour enhancement processing, and noise reduction processing.
Note that the image processing unit 33 (correction unit 33b) performs image processing after performing correction processing on image data located near the boundary of the region, as necessary.

In step S110, the control unit 34 sends an instruction to the recording unit 37, records the image data after the image processing on a recording medium (not shown), and proceeds to step S120.

In step S120, the control unit 34 determines whether an end operation has been performed. When the end operation is performed, the control unit 34 makes a positive determination in step S120 and ends the process illustrated in FIG. When the end operation is not performed, the control unit 34 makes a negative determination in step S120 and returns to step S20. When returning to step S20, the control unit 34 repeats the above-described processing.

In the above description, the multilayer image sensor 100 is illustrated as the image sensor 32a. However, if the imaging condition can be set for each of a plurality of blocks in the image sensor (imaging chip 111), the image sensor 32a is not necessarily configured as a multilayer image sensor. do not have to.

According to the first embodiment described above, the following operational effects can be obtained.
(1) The camera 1 including the focus detection device captures the first signal data generated by capturing the subject image incident on the first region of the imaging unit 32 via the imaging optical system 31 under the first imaging condition. An image processing unit 33 (correction unit 33b) that corrects based on a second imaging condition for capturing a subject image incident on the second region of the imaging unit 32, the first signal data corrected by the correction unit 33b, and the second A control unit 34 (AF calculation unit 34d) that detects information (for example, defocus amount) for moving the imaging optical system 31 based on the second signal data generated by imaging under imaging conditions. Thereby, it is possible to appropriately perform processing in areas where imaging conditions are different. That is, it is possible to appropriately detect the defocus amount based on the signal data generated in each region. For example, it is possible to suppress a decrease in focus detection accuracy due to a difference in imaging conditions for each region.

(2) The correction unit 33b of the camera 1 corrects the first signal data so that the difference between the value of the first signal data and the value of the second signal data is small. Appropriate processing can be performed.

(3) Since the correction unit 33b of the camera 1 corrects the first signal data based on the difference between the first imaging condition and the second imaging condition, the correction unit 33b can appropriately perform processing in areas where the imaging conditions are different. it can.

(4) The correction unit 33b of the camera 1 corrects the second signal data based on the first imaging condition, and the AF calculation unit 34d uses the first signal data corrected by the correction unit 33b and the correction unit 33b. The defocus amount may be detected based on the corrected second signal data. Even in this case, it is possible to appropriately perform processing in areas where imaging conditions are different.

(5) Since the AF calculation unit 34d of the camera 1 detects image shift amounts of a plurality of light images that have passed through different pupils of the imaging optical system 31, the focus detection process is appropriately performed in regions where the imaging conditions are different. be able to.

(6) Since the AF calculation unit 34d of the camera 1 detects the contrast of the subject image, the focus detection process can be appropriately performed in regions where the imaging conditions are different.

(7) The AF calculation unit 34d of the camera 1 detects the defocus amount (or contrast) for a partial region (focus detection position) of the imaging unit 32, and the first region and the second region are at the focus detection position. include. Thereby, it is possible to appropriately perform the focus detection process in regions where the imaging conditions are different.

(8) The correction unit 33b of the camera 1 stores the first signal data generated by capturing the light image incident on the first region in the first accumulation time, and the second image light incident on the second region. It correct | amends so that the difference with the 2nd signal data produced | generated by imaging in time may become small. As a result, it is possible to appropriately perform the focus detection process in regions where the charge accumulation times are different.

(9) The correction unit 33b of the camera 1 captures the first signal data generated by capturing the light image incident on the first region with the first imaging sensitivity, and the second image of the light image incident on the second region. It correct | amends so that the difference with the 2nd signal data produced | generated by imaging with a sensitivity may become small. As a result, it is possible to appropriately perform the focus detection process in regions where the charge accumulation times are different.

It may be configured to be able to switch between mode 1 in which the above-described correction processing is performed as preprocessing and mode 2 in which correction processing is not performed as preprocessing. When mode 1 is selected, the control unit 34 performs processing such as image processing after performing the above-described preprocessing. On the other hand, when mode 2 is selected, the control unit 34 performs processing such as image processing without performing the above-described preprocessing. For example, when a part of the face detected as the subject element is shaded, the shadowed part of the face is set so that the brightness of the shaded part of the face is comparable to the brightness of the part other than the shadow of the face. Is set when color interpolation processing is performed after performing correction processing on an image generated by imaging with different settings of the imaging conditions of the region including the image and the imaging conditions of the region including the part other than the shadow of the face. In some cases, unintended color interpolation may be performed on the shaded area due to a difference in imaging conditions. It is possible to avoid unintended color interpolation by configuring the mode 1 and the mode 2 so that the color interpolation process can be performed by using the image data as it is without performing the correction process.

--- Modification of the first embodiment ---
The following modifications are also within the scope of the present invention, and one or a plurality of modifications can be combined with the above-described embodiment.
(Modification 1)
FIGS. 16A to 16C are diagrams illustrating the arrangement of the first area and the second area on the imaging surface of the imaging element 32a. According to the example of FIG. 16 (a), the first region is composed of even columns, and the second region is composed of odd columns. That is, the imaging surface is divided into even columns and odd columns.

According to the example of FIG. 16 (b), the first area is composed of odd rows, and the second area is composed of even rows. That is, the imaging surface is divided into odd rows and even rows.

According to the example of FIG. 16 (c), the first area is composed of blocks of even rows in odd columns and blocks of odd rows in even columns. In addition, the second region is configured by even-numbered blocks in even columns and odd-numbered blocks in odd columns. That is, the imaging surface is divided into a checkered pattern.

In any case of FIGS. 16A to 16C, the first image based on the photoelectric conversion signal read from the first region and the photoelectric conversion signal read from the image sensor 32a that has picked up an image of one frame, and Second images based on the photoelectric conversion signals read from the second region are respectively generated. According to the first modification, the first image and the second image are captured at the same angle of view and include a common subject image.

In Modification 1, the control unit 34 uses the first image for display and the second image for detection. Specifically, the control unit 34 causes the display unit 35 to display the first image as a live view image. Further, the control unit 34 causes the object detection unit 34a to perform subject detection processing using the second image, causes the AF calculation unit 34 to perform focus detection processing using the second image, and sets the second image using the setting unit 34b. Is used to perform exposure calculation processing.

In the first modification, the imaging condition set in the first area for capturing the first image is referred to as the first imaging condition, and the imaging condition set in the second area for capturing the second image is referred to as the second imaging condition. And The control unit 34 may make the first imaging condition different from the second imaging condition.

1. As an example, the control unit 34 sets the first imaging condition to a condition suitable for display by the display unit 35. For example, the first imaging condition set for the first area is the same for the entire first area of the imaging screen. On the other hand, the control unit 34 sets the second imaging condition set in the second region to a condition suitable for the focus detection process, the subject detection process, and the exposure calculation process. The second imaging condition is the same for the entire second area of the imaging screen.
When the conditions suitable for the focus detection process, the subject detection process, and the exposure calculation process are different, the control unit 34 may change the second imaging condition set in the second area for each frame. For example, the second imaging condition of the first frame is a condition suitable for the focus detection process, the second imaging condition of the second frame is a condition suitable for the subject detection process, and the second imaging condition of the third frame is the exposure calculation process. Conditions suitable for In these cases, the second imaging condition in each frame is the same in the entire second area of the imaging screen.

2. As another example, the control unit 34 may vary the first imaging condition set in the first area depending on the area. The control unit 34 (setting unit 34b) sets different first imaging conditions for each region including the subject element divided by the setting unit 34b. On the other hand, the control unit 34 makes the second imaging condition set in the second area the same in the entire second area of the imaging screen. The control unit 34 sets the second imaging condition to a condition suitable for the focus detection process, the subject detection process, and the exposure calculation process. However, the conditions suitable for the focus detection process, the subject detection process, and the exposure calculation process are set. If they are different, the imaging conditions set in the second area may be different for each frame.

3. As another example, the control unit 34 makes the first imaging condition set for the first area the same for the entire first area of the imaging screen, while setting the second imaging condition for the second area. May be different on the imaging screen. For example, a different second imaging condition is set for each region including the subject element divided by the setting unit 34b. Even in this case, if the conditions suitable for the focus detection process, the subject detection process, and the exposure calculation process are different, the imaging conditions set in the second region may be different for each frame.

4). Furthermore, as another example, the control unit 34 varies the first imaging condition set in the first area on the imaging screen, and varies the second imaging condition set on the second area on the imaging screen. For example, the setting unit 34b sets different first imaging conditions for each region including the subject element divided, and the setting unit 34b sets different second imaging conditions for each region including the subject element divided.

In FIG. 16 (a) to FIG. 16 (c), the area ratio between the first region and the second region may be different. For example, the control unit 34 sets the ratio of the first region to be higher than that of the second region based on the operation by the user or the determination of the control unit 34, or sets the ratio of the first region to the second region as shown in FIG. As shown in FIG. 16 (c), they are set equally, or the ratio of the first area is set lower than that of the second area. By making the area ratios different between the first region and the second region, the first image is made to have a higher definition than the second image, the resolutions of the first image and the second image are made equal, or the second image is Compared to the first image, it can be made higher definition.

(Modification 2)
In the case of performing image processing, the correction process includes an imaging condition applied at the position of interest (first imaging condition), an imaging condition applied at a reference position around the position of interest (second imaging condition), and Are different, the image processing unit 33 (correction unit 33b) corrects the image data of the second imaging condition (the image data of the second imaging condition of the image data at the reference position) based on the first imaging condition. . That is, the image discontinuity of the image based on the difference between the first imaging condition and the second imaging condition is reduced by correcting the image data of the second imaging condition at the reference position.

Instead, in Modification 2, the image processing unit 33 (correction unit 33b) performs image data on the first imaging condition (image data on the first imaging condition among the image data on the target position and the image data on the reference position). May be corrected based on the second imaging condition. Also in this case, the discontinuity of the image based on the difference between the first imaging condition and the second imaging condition can be relaxed.

Alternatively, the image processing unit 33 (correction unit 33b) may correct both the image data of the first imaging condition and the image data of the second imaging condition. That is, correction is performed for the image data of the target position of the first imaging condition, the image data of the first imaging condition of the image data of the reference position, and the image data of the second imaging condition of the image data of the reference position. By performing the processing, the discontinuity of the image based on the difference between the first imaging condition and the second imaging condition may be alleviated.
For example, in the above (Example 1), 400/100 is applied as correction processing to the image data of the reference pixel, which is the first imaging condition (ISO sensitivity is 100), and the second imaging condition (ISO sensitivity is 800). 400/800 is applied to the image data of the reference pixel as a correction process. Thereby, the difference between the image data due to the difference in the imaging conditions is reduced. Note that the pixel data of the pixel of interest undergoes a correction process that multiplies 100/400 after the color interpolation process. With this correction process, the pixel data of the target pixel after the color interpolation process can be changed to the same value as when the image is captured under the first imaging condition. Furthermore, in the above (Example 1), the degree of the correction process may be changed depending on the distance from the boundary between the first area and the second area. Compared to the case of (Example 1), the rate at which the image data is increased or decreased by the correction process can be reduced, and noise generated by the correction process can be reduced. Although the above (Example 1) has been described above, the above (Example 2) can be similarly applied.

According to the modified example 2, as in the above-described embodiment, it is possible to appropriately perform image processing on each generated image data of regions having different imaging conditions.

(Modification 3)
In the above description, when the correction process is performed on the image data, the corrected image data is obtained by performing the calculation based on the difference between the first imaging condition and the second imaging condition. Instead of calculation, corrected image data may be obtained by referring to a correction table. For example, the corrected image data is read by inputting the first imaging condition and the second imaging condition as arguments. Alternatively, the correction coefficient may be read out by inputting the first imaging condition and the second imaging condition as arguments.

(Modification 4)
In the correction process described above, an upper limit and a lower limit of the corrected image data may be set. By providing an upper limit value and a lower limit value, it is possible to limit so as not to make unnecessary corrections. The upper limit value and the lower limit value may be determined in advance, or may be determined based on an output signal from the photometric sensor when a photometric sensor is provided separately from the image sensor 32a.

(Modification 5)
In the above embodiment, an example has been described in which the control unit 34 (setting unit 34b) detects a subject element based on a live view image and divides the screen of the live view image into regions including the subject element. In the fifth modification, when the control unit 34 includes a photometric sensor in addition to the imaging device 32a, the control unit 34 may divide the region based on an output signal from the photometric sensor.

The control unit 34 divides the foreground and the background based on the output signal from the photometric sensor. Specifically, the live view image acquired by the image sensor 32b is a foreground area corresponding to an area determined as a foreground from an output signal from a photometric sensor, and an area determined as a background from an output signal from the photometric sensor. Is divided into background areas corresponding to.

The control unit 34 further arranges the first area and the second area as illustrated in FIGS. 16A to 16C with respect to the position corresponding to the foreground area of the imaging surface of the imaging element 32a. . On the other hand, the control unit 34 arranges only the first area on the imaging surface of the imaging element 32a with respect to the position corresponding to the background area of the imaging surface of the imaging element 32a. The control unit 34 uses the first image for display and the second image for detection.

According to the modified example 5, the live view image acquired by the image sensor 32b can be divided by using the output signal from the photometric sensor. In addition, a first image for display and a second image for detection can be obtained for the foreground area, and only a first image for display can be obtained for the background area.

(Modification 6)
In Modification 6, the image processing unit 33 (generation unit 33c) performs contrast adjustment processing as an example of correction processing. That is, the generation unit 33c relaxes the discontinuity of the image based on the difference between the first imaging condition and the second imaging condition by changing the gradation curve (gamma curve).

For example, it is assumed that only the ISO sensitivity is different between the first imaging condition and the second imaging condition, the ISO sensitivity of the first imaging condition is 100, and the ISO sensitivity of the second imaging condition is 800. The generation unit 33c compresses the value of the image data of the second imaging condition in the image data at the reference position to 1/8 by laying down the gradation curve.

Alternatively, the generation unit 33c may expand the value of the image data of the first imaging condition among the image data of the target position and the image data of the reference position by increasing the gradation curve by 8 times.

According to the modified example 6, as in the above-described embodiment, it is possible to appropriately perform image processing on image data respectively generated in regions with different imaging conditions. For example, discontinuity and discomfort appearing in an image after image processing can be suppressed due to a difference in imaging conditions at the boundary between regions.

(Modification 7)
In the modified example 7, the image processing unit 33 does not impair the contour of the subject element in the above-described image processing (for example, noise reduction processing). In general, smoothing filter processing is employed when noise reduction is performed. When the smoothing filter is used, the boundary of the subject element may be blurred while the noise reduction effect.

Therefore, for example, the image processing unit 33 (the generation unit 33c) compensates for the blur of the boundary of the subject element by performing a contrast adjustment process in addition to or in addition to the noise reduction process. In the modified example 7, the image processing unit 33 (generation unit 33c) sets a curve that draws an S shape as a density conversion (gradation conversion) curve (so-called S-shaped conversion). The image processing unit 33 (generation unit 33c) performs contrast adjustment using S-shaped conversion, thereby extending the gradation portions of the bright data and the dark data to respectively increase the number of gradations of the bright data (and dark data). At the same time, the number of gradations is reduced by compressing intermediate gradation image data. As a result, the number of image data having a medium brightness is reduced, and data classified as either bright / dark is increased. As a result, blurring of the boundary of the subject element can be compensated.

According to the modified example 7, blurring of the boundary of the subject element can be compensated by clearing the contrast of the image.

(Modification 8)
In the modification 8, the image processing unit 33 (the generation unit 33c) changes the white balance adjustment gain so as to reduce the discontinuity of the image based on the difference between the first imaging condition and the second imaging condition.

For example, when the imaging condition applied at the time of imaging at the target position (referred to as the first imaging condition) is different from the imaging condition applied at the time of imaging at the reference position around the target position (referred to as the second imaging condition). The image processing unit 33 (generating unit 33c) brings the white balance of the image data of the second imaging condition out of the image data at the reference position closer to the white balance of the image data acquired under the first imaging condition. Change the white balance adjustment gain.

Note that the image processing unit 33 (the generation unit 33c) determines the white balance between the image data of the first imaging condition and the image data of the target position in the image data at the reference position, and the white balance of the image data acquired under the second imaging condition. The white balance adjustment gain may be changed so as to approach the white balance.

According to the modified example 8, by adjusting the white balance adjustment gain to the adjustment gain of one of the areas with different imaging conditions for the image data generated in the area with different imaging conditions, the first imaging condition and the second imaging condition are set. The discontinuity of the image based on the difference from the imaging condition can be reduced.

(Modification 9)
A plurality of image processing units 33 may be provided, and image processing may be performed in parallel. For example, image processing is performed on the image data captured in the region B of the imaging unit 32 while performing image processing on the image data captured in the region A of the imaging unit 32. The plurality of image processing units 33 may perform the same image processing or different image processing. That is, the same parameters are applied to the image data of the region A and the region B, and the same image processing is performed, or the different parameters are applied to the image data of the region A and the region B to perform different image processing. You can do it.

In the case where a plurality of image processing units 33 are provided, image processing is performed by one image processing unit on image data to which the first imaging condition is applied, and other is performed on image data to which the second imaging condition is applied. The image processing unit may perform image processing. The number of image processing units is not limited to the above two, and for example, the same number as the number of imaging conditions that can be set may be provided. That is, each image processing unit takes charge of image processing for each region to which different imaging conditions are applied. According to the modification 9, it is possible to proceed in parallel with imaging under different imaging conditions for each area and image processing for image data of the image obtained for each area.

(Modification 10)
In the above description, the camera 1 has been described as an example. However, a high-function mobile phone 250 (FIG. 18) having a camera function like a smartphone or a mobile device such as a tablet terminal may be used.

(Modification 11)
In the above-described embodiment, the camera 1 in which the imaging unit 32 and the control unit 34 are configured as a single electronic device has been described as an example. Instead, for example, the imaging unit 1 and the control unit 34 may be provided separately, and the imaging system 1B that controls the imaging unit 32 from the control unit 34 via communication may be configured.
Hereinafter, an example in which the imaging device 1001 including the imaging unit 32 is controlled from the display device 1002 including the control unit 34 will be described with reference to FIG.

FIG. 17 is a block diagram illustrating the configuration of the imaging system 1B according to the modification 11. In FIG. 17, the imaging system 1 B includes an imaging device 1001 and a display device 1002. The imaging device 1001 includes a first communication unit 1003 in addition to the imaging optical system 31 and the imaging unit 32 described in the above embodiment. The display device 1002 includes a second communication unit 1004 in addition to the image processing unit 33, the control unit 34, the display unit 35, the operation member 36, and the recording unit 37 described in the above embodiment.

The first communication unit 1003 and the second communication unit 1004 can perform bidirectional image data communication using, for example, a well-known wireless communication technology or optical communication technology.
Note that the imaging device 1001 and the display device 1002 may be connected by a wired cable, and the first communication unit 1003 and the second communication unit 1004 may perform bidirectional image data communication.

In the imaging system 1B, the control unit 34 controls the imaging unit 32 by performing data communication via the second communication unit 1004 and the first communication unit 1003. For example, by transmitting and receiving predetermined control data between the imaging device 1001 and the display device 1002, the display device 1002 divides the screen into a plurality of regions based on the images as described above, or the divided regions. A different imaging condition is set for each area, or a photoelectric conversion signal photoelectrically converted in each area is read out.

According to the modification 11, since the live view image acquired on the imaging device 1001 side and transmitted to the display device 1002 is displayed on the display unit 35 of the display device 1002, the user is at a position away from the imaging device 1001. Remote control can be performed from a certain display device 1002.
The display device 1002 can be configured by a high-function mobile phone 250 such as a smartphone, for example. In addition, the imaging device 1001 can be configured by an electronic device including the above-described stacked imaging element 100.
In addition, although the example which provides the control part 34 of the display apparatus 1002 with the object detection part 34a, the setting part 34b, the imaging control part 34c, and the AF calculating part 34d was demonstrated, the object detection part 34a, the setting part 34b, and imaging A part of the control unit 34c and the AF calculation unit 34d may be provided in the imaging apparatus 1001.

(Modification 12)
The program is supplied to the mobile device such as the camera 1, the high-function mobile phone 250, or the tablet terminal as described above by, for example, infrared communication or short-range wireless communication from the personal computer 205 storing the program as illustrated in FIG. 18. Can be sent to mobile devices.

The program may be supplied to the personal computer 205 by setting a recording medium 204 such as a CD-ROM storing the program in the personal computer 205 or by a method via the communication line 201 such as a network. You may load. When passing through the communication line 201, the program is stored in the storage device 203 of the server 202 connected to the communication line.

Also, the program can be directly transmitted to the mobile device via a wireless LAN access point (not shown) connected to the communication line 201. Further, a recording medium 204B such as a memory card storing the program may be set in the mobile device. Thus, the program can be supplied as various forms of computer program products, such as provision via a recording medium or a communication line.

--- Second Embodiment ---
With reference to FIGS. 19 to 25, a digital camera will be described as an example of an electronic apparatus equipped with the image processing apparatus according to the second embodiment. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and different points will be mainly described. Points that are not particularly described are the same as those in the first embodiment. In the present embodiment, instead of providing the image processing unit 33 of the first embodiment, the image processing unit 32A has an image processing unit 32c having the same function as the image processing unit 33 of the first embodiment. Is different from the first embodiment in that

FIG. 19 is a block diagram illustrating the configuration of the camera 1C according to the second embodiment. In FIG. 19, the camera 1 C includes an imaging optical system 31, an imaging unit 32 A, a control unit 34, a display unit 35, an operation member 36, and a recording unit 37. The imaging unit 32A further includes an image processing unit 32c having the same function as the image processing unit 33 of the first embodiment.

The image processing unit 32 c includes an input unit 321, a correction unit 322, and a generation unit 323. Image data from the image sensor 32 a is input to the input unit 321. The correction unit 322 performs preprocessing for correcting the input image data. The preprocessing performed by the correction unit 322 is the same as the preprocessing performed by the correction unit 33b in the first embodiment. The generation unit 323 performs image processing on the input image data and the pre-processed image data to generate an image. The image processing performed by the generation unit 323 is the same as the image processing performed by the generation unit 33c in the first embodiment.

FIG. 20 is a diagram schematically showing the correspondence between each block and a plurality of correction units 322 in the present embodiment. In FIG. 20, one square of the imaging chip 111 represented by a rectangle represents one block 111a. Similarly, one square of an image processing chip 114 described later represented by a rectangle represents one correction unit 322.

In the present embodiment, the correction unit 322 is provided for each block 111a. In other words, the correction unit 322 is provided for each block which is the minimum unit of the area where the imaging condition can be changed on the imaging surface. For example, in FIG. 20, the hatched block 111a and the hatched correction unit 322 have a correspondence relationship. In FIG. 20, the hatched correction unit 322 performs preprocessing on image data from pixels included in the hatched block 111a. Each correction unit 322 performs preprocessing on image data from pixels included in the corresponding block 111a.
As a result, the preprocessing of the image data can be processed in parallel by the plurality of correction units 322, so that the processing burden on the correction unit 322 can be reduced, and an appropriate image can be quickly generated from the image data generated in each of the areas with different imaging conditions. Can be generated.
In the following description, when a relationship between a certain block 111a and a pixel included in the block 111a is described, the block 111a may be referred to as a block 111a to which the pixel belongs. The block 111a may be referred to as a unit section, and a plurality of blocks 111a, that is, a plurality of unit sections may be referred to as a composite section.

FIG. 21 is a cross-sectional view of the multilayer imaging element 100A. The multilayer imaging element 100A further includes an image processing chip 114 that performs the above-described preprocessing and image processing in addition to the backside illumination imaging chip 111, the signal processing chip 112, and the memory chip 113. That is, the above-described image processing unit 32c is provided in the image processing chip 114.
The imaging chip 111, the signal processing chip 112, the memory chip 113, and the image processing chip 114 are stacked, and are electrically connected to each other by a conductive bump 109 such as Cu.

A plurality of bumps 109 are arranged on the mutually facing surfaces of the memory chip 113 and the image processing chip 114. The bumps 109 are aligned with each other, and the memory chip 113 and the image processing chip 114 are pressurized, so that the aligned bumps 109 are joined and electrically connected.

<Correction process>
Similar to the first embodiment, in the second embodiment, after the region of the imaging screen is divided by the setting unit 34b, the region selected by the user or the region determined by the control unit 34 is determined. The imaging conditions can be set (changed). When different imaging conditions are set in the divided areas, the control unit 34 causes the correction unit 322 to perform the following correction processing as necessary.

1. When performing image processing 1-1. When the imaging condition of the target pixel P is the same as the imaging conditions of a plurality of reference pixels around the target pixel P In this case, in the image processing unit 32c, the correction unit 322 does not perform correction processing, and the generation unit 323 performs correction. Image processing is performed using image data of a plurality of reference pixels that have not been processed.

1-2. When the imaging condition of the target pixel P is different from the imaging condition of at least one reference pixel among the plurality of reference pixels around the target pixel P, the imaging condition applied in the target pixel P is set as the first imaging condition, The imaging conditions applied to a part of the reference pixels are the first imaging conditions, and the imaging conditions applied to the remaining reference pixels are the second imaging conditions.
In this case, the correction unit 322 corresponding to the block 111a to which the reference pixel to which the second imaging condition is applied belongs is described below (Example 1) with respect to the image data of the reference pixel to which the second imaging condition is applied. Correction processing is performed as in (Example 3). Then, the generation unit 323 performs image processing for calculating the image data of the target pixel P with reference to the image data of the reference pixel to which the first imaging condition is applied and the image data of the reference pixel after the correction process.

(Example 1)
For example, the correction unit 322 corresponding to the block 111a to which the reference pixel to which the second imaging condition is applied belongs, for example, differs only in ISO sensitivity between the first imaging condition and the second imaging condition, and the ISO sensitivity of the first imaging condition. Is 100 and the ISO sensitivity of the second imaging condition is 800, the image data of the reference pixel is subjected to 100/800 as a correction process. Thereby, the difference between the image data due to the difference in the imaging conditions is reduced.

(Example 2)
For example, the correction unit 322 corresponding to the block 111a to which the reference pixel to which the second imaging condition is applied belongs, for example, only the shutter speed differs between the first imaging condition and the second imaging condition, and the shutter speed of the first imaging condition. Is 1/1000 second, and the shutter speed of the second imaging condition is 1/100 second, 1/1000/1/100 = 1/10 is applied to the image data of the reference pixel as a correction process. Thereby, the difference between the image data due to the difference in the imaging conditions is reduced.

(Example 3)
The correction unit 322 corresponding to the block 111a to which the reference pixel to which the second imaging condition is applied belongs, for example, only the frame rate is different between the first imaging condition and the second imaging condition (the charge accumulation time is the same), When the frame rate of the first imaging condition is 30 fps and the frame rate of the second imaging condition is 60 fps, the first imaging condition (30 fps) for the image data of the reference pixel, that is, the image data of the second imaging condition (60 fps). The correction processing is to adopt image data of a frame image that is close in acquisition start timing to the frame image acquired in step (1). Thereby, the difference between the image data due to the difference in the imaging conditions is reduced.
It should be noted that, based on a plurality of previous and subsequent frame images acquired under the second imaging condition (60 fps), interpolation calculation is performed on the frame image acquired under the first imaging condition (30 fps) and the frame image whose acquisition start timing is close. This may be a correction process.

The same applies to the case where the imaging condition applied at the target pixel P is the second imaging condition and the imaging condition applied at the reference pixels around the target pixel P is the first imaging condition. In other words, in this case, the correction unit 322 corresponding to the block 111a to which the reference pixel to which the first imaging condition is applied belongs to the image data of the reference pixel described above (Example 1) to (Example 3). The correction process is performed as follows.

Note that, as described above, even if there are some differences in imaging conditions, they are regarded as the same imaging conditions.

The generation unit 323 is based on the reference pixel image data to which the same imaging condition as the imaging condition of the target pixel P is applied and the reference pixel image data corrected by the correction unit 322 in the first embodiment. Similar to the image processing unit 33 (generation unit 33c), image processing such as pixel defect correction processing, color interpolation processing, contour enhancement processing, and noise reduction processing is performed.

FIG. 22 illustrates image data (hereinafter referred to as first image data) from each pixel included in a partial area (hereinafter referred to as first area 141) of the imaging surface to which the first imaging condition is applied, The processing with image data (hereinafter referred to as second image data) from each pixel included in a partial area (hereinafter referred to as second area 142) of the imaging surface to which the two imaging conditions are applied is schematically illustrated. FIG.

The first image data captured under the first imaging condition is output from each pixel included in the first area 141, and the first image data captured under the second imaging condition is output from each pixel included in the second area 142. Two image data are respectively output. The first image data is output to the correction unit 322 corresponding to the block 111 a to which the pixel that generated the first image data belongs, among the correction units 322 provided in the processing chip 114. In the following description, the plurality of correction units 322 respectively corresponding to the plurality of blocks 111a to which the pixels that generate the respective first image data belong are referred to as first processing units 151.
Similarly, the second image data is output to the correction unit 322 corresponding to the block 111a to which the pixel that generated the second image data belongs among the correction units 322 provided in the processing chip 114. In the following description, the plurality of correction units 322 respectively corresponding to the plurality of blocks 111a to which the respective pixels that generate the respective second image data belong are referred to as second processing units 152.

For example, when the target pixel P is included in the first region 141, the second image data from the reference pixels included in the second region 142 is subjected to the above-described correction processing by the second processing unit 152 as shown in FIG. Is called. Note that the second processing unit 152 receives, from the first processing unit 151, for example, information 181 about the first imaging condition necessary to reduce the difference between the image data due to the difference in the imaging condition.
Similarly, for example, when the target pixel P is included in the second region 142, the first processing unit 151 performs the above-described correction processing on the first image data from the reference pixels included in the first region 141. The first processing unit 151 receives information on the second imaging condition necessary for reducing the difference between the image data due to the difference in the imaging condition from the second processing unit 152.

Note that when the target pixel P and the reference pixel are included in the first region 141, the first processing unit 151 does not correct the first image data from the reference pixel. Similarly, when the target pixel P and the reference pixel are included in the second region 142, the second processing unit 152 does not correct the second image data from the reference pixel.
Alternatively, both the image data of the first imaging condition and the image data of the second imaging condition may be corrected by the first processing unit 151 and the second processing unit 152, respectively. That is, correction is performed for the image data of the target position of the first imaging condition, the image data of the first imaging condition of the image data of the reference position, and the image data of the second imaging condition of the image data of the reference position. By performing the processing, the discontinuity of the image based on the difference between the first imaging condition and the second imaging condition may be alleviated.
For example, in the above (Example 1), 400/100 is applied as correction processing to the image data of the reference pixel, which is the first imaging condition (ISO sensitivity is 100), and the second imaging condition (ISO sensitivity is 800). 400/800 is applied to the image data of the reference pixel as a correction process. Thereby, the difference between the image data due to the difference in the imaging conditions is reduced. Note that the pixel data of the pixel of interest undergoes a correction process that multiplies 100/400 after the color interpolation process. With this correction process, the pixel data of the target pixel after the color interpolation process can be changed to the same value as when the image is captured under the first imaging condition. Furthermore, in the above (Example 1), the degree of the correction process may be changed depending on the distance from the boundary between the first area and the second area. Compared to the case of (Example 1), the rate at which the image data is increased or decreased by the correction process can be reduced, and noise generated by the correction process can be reduced. Although the above (Example 1) has been described above, the above (Example 2) can be similarly applied.

The generation unit 323 performs image processing such as pixel defect correction processing, color interpolation processing, contour enhancement processing, and noise reduction processing based on the image data from the first processing unit 151 and the second processing unit 152, and performs image processing. The later image data is output.

The first processing unit 151 may correct the first image data from all the pixels included in the first region 141 when the target pixel P is located in the second region 142. The first region Of the pixels included in 141, only the first image data from pixels that may be used for interpolation of the pixel of interest P in the second region 142 may be corrected. Similarly, the second processing unit 152 may correct the second image data from all the pixels included in the second region 142 when the target pixel P is located in the first region 141. Of the pixels included in the region 142, only the second image data from pixels that may be used for interpolation of the target pixel P in the first region 141 may be corrected.

2. When performing focus detection processing As in the first embodiment, the control unit 34 (AF calculation unit 34d) performs focus using signal data (image data) corresponding to a predetermined position (focus detection position) on the imaging screen. Perform detection processing. Note that when different imaging conditions are set for the divided areas and the focus detection position of the AF operation is located at the boundary portion of the divided areas, that is, the focus detection positions are 2 in the first area and the second area. In the present embodiment, the following 2-2. As will be described below, the control unit 34 (AF calculation unit 34d) causes the correction unit 322 to perform correction processing on signal data for focus detection in at least one region.

2-1. When signal data to which the first imaging condition is applied and signal data to which the second imaging condition is applied are not mixed in the signal data from the pixels in the frame 170 in FIG. 13. In this case, the correction unit 322 performs correction processing. Instead, the control unit 34 (AF calculation unit 34d) performs the focus detection process using the signal data from the focus detection pixels indicated by the frame 170 as they are.

2-2. When signal data to which the first imaging condition is applied and signal data to which the second imaging condition is applied are mixed in the signal data from the pixels in the frame 170 in FIG. 13. In this case, the control unit 34 (AF calculation The unit 34d) corrects the correction unit 322 corresponding to the block 111a to which the pixel to which the second imaging condition is applied among the pixels in the frame 170 as shown in (Example 1) to (Example 3) below. Let the process do. Then, the control unit 34 (AF calculation unit 34d) performs focus detection processing using the pixel signal data to which the first imaging condition is applied and the signal data after the correction processing.

(Example 1)
For example, the correction unit 322 corresponding to the block 111a to which the pixel to which the second imaging condition is applied belongs only differs in ISO sensitivity between the first imaging condition and the second imaging condition, and the ISO sensitivity of the first imaging condition is different. If the ISO sensitivity of the second imaging condition is 800 at 100, the signal data of the second imaging condition is multiplied by 100/800 as correction processing. Thereby, the difference between the signal data due to the difference in the imaging conditions is reduced.

(Example 2)
The correction unit 322 corresponding to the block 111a to which the pixel to which the second imaging condition is applied belongs, for example, only the shutter speed is different between the first imaging condition and the second imaging condition, and the shutter speed of the first imaging condition is When the shutter speed of the second imaging condition is 1/100 second at 1/1000 second, 1/1000/1/100 = 1/10 is applied as the correction process to the signal data of the second imaging condition. Thereby, the difference between the signal data due to the difference in the imaging conditions is reduced.

(Example 3)
For example, the correction unit 322 corresponding to the block 111a to which the pixel to which the second imaging condition is applied belongs differs only in the frame rate (the charge accumulation time is the same) between the first imaging condition and the second imaging condition. When the frame rate of the first imaging condition is 30 fps and the frame rate of the second imaging condition is 60 fps, acquisition of the frame image acquired under the first imaging condition (30 fps) and acquisition of the signal data of the second imaging condition (60 fps) is started. Employing frame image signal data with close timing is referred to as correction processing. Thereby, the difference between the signal data due to the difference in the imaging conditions is reduced.
In addition, based on a plurality of previous and subsequent frame images acquired under the second imaging condition (60 fps), interpolation calculation is performed on the signal data of the frame image acquired under the first imaging condition (30 fps) and the acquisition start timing is similar. This may be a correction process.

As described above, even if there are some differences in the imaging conditions, the imaging conditions are regarded as the same.
In the above example, the example in which the correction process is performed on the signal data of the second imaging condition in the signal data has been described. However, the correction process is performed on the signal data of the first imaging condition in the signal data. You may go.

Furthermore, by performing correction processing on the signal data of the first imaging condition and the data of the second imaging condition in the signal data, the difference between the two signal data after the correction processing is reduced. Also good.

FIG. 23 is a diagram schematically showing processing of the first signal data and the second signal data related to the focus detection processing.

The first signal data imaged under the first imaging condition is output from each pixel included in the first region 141, and the second signal imaged under the second imaging condition is output from each pixel included in the second region 142. Signal data is output. The first signal data from the first region 141 is output to the first processing unit 151. Similarly, the second signal data from the second region 142 is output to the second processing unit 152.

When the difference between the signal data after the correction process and the signal data of the first imaging condition is reduced by performing the correction process on the signal data of the second imaging condition of the signal data, the second processing unit 152 Process. The second processing unit 152 performs the above-described correction process on the second signal data from the pixels included in the second region 142. Note that the second processing unit 152 receives, for example, information 181 about the first imaging condition necessary for reducing the difference between the signal data due to the difference in the imaging condition from the first processing unit 151.
In the case where the difference between the signal data after the correction processing and the signal data of the first imaging condition is reduced by performing correction processing on the signal data of the second imaging condition of the signal data, the first processing unit 151 does not correct the first signal data.

In the case where the difference between the signal data after the correction processing and the signal data of the first imaging condition is reduced by performing correction processing on the signal data of the first imaging condition of the signal data, the first processing unit 151 performs processing. The first processing unit 151 performs the above-described correction process on the first signal data from the pixels included in the first region 141. Note that the first processing unit 151 receives information about the second imaging condition necessary for reducing the difference between the signal data due to the difference in the imaging condition from the second processing unit 152.
When the difference between the signal data after the correction process and the signal data of the first imaging condition is reduced by performing the correction process on the signal data of the first imaging condition in the signal data, the second processing unit 152 does not correct the second signal data.

Furthermore, in the case where the difference between the two signal data after the correction processing is reduced by performing correction processing on the signal data of the first imaging condition and the data of the second imaging condition of the signal data, The first processing unit 151 and the second processing unit 152 perform processing. The first processing unit 151 performs the above-described correction processing on the first signal data from the pixels included in the first region 141, and the second processing unit 152 performs the second signal data from the pixels included in the second region 142. The correction process described above is performed.

The AF calculation unit 34d performs focus detection processing based on the signal data from the first processing unit 151 and the second processing unit 152, and moves the focus lens of the imaging optical system 31 to the in-focus position based on the calculation result. The drive signal for making it output is output.

3. When subject detection processing is performed When different imaging conditions are set for the divided areas and the search range 190 includes the boundaries of the divided areas, in the present embodiment, the following 3-2. As will be described, the control unit 34 (object detection unit 34a) causes the correction unit 322 to perform correction processing on image data of at least one region in the search range 190.

3-1. In the case where image data to which the first imaging condition is applied and image data to which the second imaging condition is applied are not mixed in the image data in the search range 190 in FIG. The unit 34 (the object detection unit 34a) performs subject detection processing using the image data constituting the search range 190 as it is.

3-2. When image data to which the first imaging condition is applied and image data to which the second imaging condition is applied are mixed in the image data in the search range 190 in FIG. 14. In this case, the control unit 34 (object detection unit 34 a) Of the images in the search range 190, the cases of (Example 1) to (Example 3) described above as the case where the focus detection process is performed on the correction unit 322 corresponding to the block 111a to which the pixel to which the second imaging condition is applied belong. The correction process is performed as follows. The control unit 34 (object detection unit 34a) performs subject detection processing using the image data of the pixels to which the first condition is applied and the image data after the correction processing.

FIG. 24 is a diagram schematically showing processing of the first image data and the second image data related to the subject detection processing. The correction process performed by the first processing unit 151 and / or the second processing unit 152 is the same as the correction process for FIG. 23 described above as the case of performing the focus detection process.

The object detection unit 34a performs a process of detecting a subject element based on the image data from the first processing unit 151 and the second processing unit 152, and outputs a detection result.

4). When Setting Imaging Conditions A case will be described in which the area of the imaging screen is divided, and different exposure conditions are set for the divided areas, the exposure conditions are determined by performing new photometry.

4-1. When the image data to which the first imaging condition is applied and the image data to which the second imaging condition is applied are not mixed in the image data in the photometric range In this case, the correction unit 322 does not perform the correction process and the control unit 34 (setting The unit 34b) performs exposure calculation processing using the image data constituting the photometric range as it is.

4-2. When image data to which the first imaging condition is applied and image data to which the second imaging condition is applied are mixed in the image data in the photometric range In this case, the control unit 34 (setting unit 34b) Among them, the correction processing is performed as in the above (Example 1) to (Example 3) as the case where the focus detection processing is performed on the correction unit 322 corresponding to the block 111a to which the pixel to which the second imaging condition is applied belongs. Let it be done. Then, the control unit 34 (setting unit 34b) performs an exposure calculation process using the image data after the correction process.

FIG. 25 is a diagram schematically showing processing of the first image data and the second image data related to setting of imaging conditions such as exposure calculation processing. The correction process performed by the first processing unit 151 and / or the second processing unit 152 is the same as the correction process for FIG. 23 described above as the case of performing the focus detection process.

The setting unit 34b performs an imaging condition calculation process such as an exposure calculation process based on the image data from the first processing unit 151 and the second processing unit 152, and the imaging screen by the imaging unit 32 is displayed based on the calculation result. Then, the image is divided into a plurality of areas including the detected subject element, and the imaging conditions are reset for the plurality of areas.

According to the second embodiment described above, the following operational effects can be obtained.
(1) The camera 1C is capable of imaging by changing the imaging condition for each unit section of the imaging surface, and the first image data from the first region composed of at least one unit section captured under the first imaging condition; An image sensor 32a is provided that generates second image data from a second region composed of at least one unit segment imaged under a second imaging condition different from the first imaging condition. The camera 1C is provided for each unit section or for each composite section having a plurality of unit sections, and can correct a plurality of image data from the corresponding unit section or the unit sections in the corresponding composite section. A correction unit 322 is provided. The correction unit 322 corresponding to the unit section or the composite section in the second region corrects the first image data according to the second imaging condition. The imaging element 32a is provided in the backside illumination type imaging chip 111. The plurality of correction units 322 are provided in the image processing chip 114.
Thereby, since the correction process of image data can be performed in parallel by the plurality of correction units 322, the processing load on the correction unit 322 can be reduced.

(2) The backside illumination type imaging chip 111 and the image processing chip 114 are stacked. Thereby, the image pick-up element 32a and the image process part 32c can be connected easily.

(3) The camera 1C includes a generation unit 323 that generates an image based on the first image data corrected by the correction unit 322 and the second image data. Thereby, since the pre-processing by the plurality of correction units 322 is performed in a short time by parallel processing, the time until an image is generated can be shortened.

(4) The camera 1C is capable of imaging by changing the imaging conditions for each unit section of the imaging surface, and includes at least one unit section that captures an optical image incident through the imaging optical system under the first imaging condition. Generating first image data from the first region and second image data from the second region composed of at least one unit section obtained by imaging an incident light image under a second imaging condition different from the first imaging condition; An image sensor 32a is provided. The camera 1C includes a plurality of correction units 322 that are provided corresponding to each unit section or each composite section having a plurality of unit sections and that can correct image data from the corresponding unit section or the unit section in the corresponding composite section. Prepare. The camera 1C includes an AF calculation unit 34d that detects information for moving the imaging optical system. The correction unit 322 corresponding to the unit section or the composite section in the first area corrects the first image data so that the difference from the second image data is small. The AF calculation unit 34d detects information for moving the imaging optical system based on the first image data corrected by the correction unit 322 and the second image data. The imaging element 32a is provided in the backside illumination type imaging chip 111. The plurality of correction units 322 are provided in the image processing chip 114.
Thereby, since the correction process of image data can be performed in parallel by the plurality of correction units 322, the processing burden on the correction unit 322 can be reduced, and the preprocessing by the plurality of correction units 322 is performed in a short time by the parallel processing. The time until the start of the focus detection process in the AF calculation unit 34d can be shortened, which contributes to speeding up of the focus detection process.

(5) The camera 1C can capture an image by changing the imaging condition for each unit section of the imaging surface, and the first image from the first region including at least one unit section obtained by capturing the incident subject image under the first imaging condition. An image sensor 32a is provided that generates one image data and second image data from a second region composed of at least one unit segment obtained by imaging an incident subject image under a second imaging condition different from the first imaging condition. The camera 1C includes a plurality of correction units 322 that are provided corresponding to each unit section or each composite section having a plurality of unit sections and that can correct image data from the corresponding unit section or the unit section in the corresponding composite section. Prepare. The camera 1C includes an object detection unit 34a that detects an object from a subject image. The correction unit 322 corresponding to the unit section or the composite section in the first region corrects the first image data so that the difference from the value of the second image data is small. The object detection unit 34a detects an object from the subject image based on the first image data corrected by the correction unit 322 and the second image data. The imaging element 32a is provided in the backside illumination type imaging chip 111. The plurality of correction units 322 are provided in the image processing chip 114.
Thereby, since the correction process of image data can be performed in parallel by the plurality of correction units 322, the processing burden on the correction unit 322 can be reduced, and the preprocessing by the plurality of correction units 322 is performed in a short time by the parallel processing. The time until the start of the subject detection process in the object detection unit 34a can be shortened, which contributes to the speedup of the subject detection process.

(6) The camera 1 C is capable of imaging by changing the imaging condition for each unit section of the imaging surface. An image sensor 32a is provided that generates one image data and second image data from a second region composed of at least one unit segment obtained by imaging an incident light image under a second imaging condition different from the first imaging condition. The camera 1C includes a plurality of correction units 322 that are provided corresponding to each unit section or each composite section having a plurality of unit sections and that can correct image data from the corresponding unit section or the unit section in the corresponding composite section. Prepare. The camera 1C includes a setting unit 34b that sets imaging conditions. The correction unit 322 corresponding to the unit section or the composite section in the first area corrects the first image data so that the difference from the second image data is small. The setting unit 34b sets an imaging condition based on the first image data corrected by the correction unit 322 and the second image data. The imaging element 32a is provided in the backside illumination type imaging chip 111. The plurality of correction units 322 are provided in the image processing chip 114.
Thereby, since the correction process of image data can be performed in parallel by the plurality of correction units 322, the processing burden on the correction unit 322 can be reduced, and the preprocessing by the plurality of correction units 322 is performed in a short time by the parallel processing. The time until the start of the imaging condition setting process in the setting unit 34b can be shortened, which contributes to speeding up of the imaging condition setting process.

--- Modification of the second embodiment ---
The following modifications are also within the scope of the present invention, and one or a plurality of modifications can be combined with the above-described embodiment.
(Modification 13)
As shown in FIGS. 16A to 16C in the first modification of the first embodiment, the first image data when the first area and the second area are arranged on the imaging surface of the imaging element 32a. And processing of the second image data will be described.
Also in this modified example, as in the modified example 1, in any of the cases shown in FIGS. 16A to 16C, the first region is determined by the pixel signal read from the imaging element 32a that has captured one frame. A first image based on the image signal read from the second image and a second image based on the image signal read from the second region are respectively generated. Also in the present modification, as in Modification 1, the control unit 34 uses the first image for display and the second image for detection.
An imaging condition set in the first area for capturing the first image is referred to as a first imaging condition, and an imaging condition set in the second area for capturing the second image is referred to as a second imaging condition. The control unit 34 may make the first imaging condition different from the second imaging condition.

1. As an example, the first imaging condition set for the first area is the same for the entire first area of the imaging screen, and the second imaging condition set for the second area is the same for the entire second area of the imaging screen. This case will be described with reference to FIG. FIG. 26 is a diagram schematically illustrating processing of the first image data and the second image data.

The first image data captured under the first imaging condition is output from each pixel included in the first area 141, and the second image captured under the second imaging condition is output from each pixel included in the second area 142. Image data is output. The first image data from the first area 141 is output to the first processing unit 151. Similarly, the second image data from the second region 142 is output to the second processing unit 152.

In this example, since the first imaging condition is the same for the entire first area of the imaging screen, the first processing unit 151 does not correct the first image data from the reference pixels included in the first area. In addition, since the second imaging condition is the same for the entire second area of the imaging screen, the second processing unit 152 does not correct the second image data used for the focus detection process, the subject detection process, and the exposure calculation process. . However, for the second image data used for the interpolation of the first image data, the second processing unit 152 performs a correction process for reducing the difference between the image data due to the difference between the first imaging condition and the second imaging condition. The second processing unit 152 outputs the second image data after the correction processing to the first processing unit 151 as indicated by an arrow 182. Note that the second processing unit 152 may output the second image data after the correction processing to the generation unit 323 as indicated by a dashed arrow 183.
The second processing unit 152 receives, from the first processing unit 151, for example, information 181 about the first imaging condition necessary to reduce the difference between the image data due to the difference in the imaging condition.

Based on the first image data from the first processing unit 151 and the second image data corrected by the second processing unit 152, the generation unit 323 performs pixel defect correction processing, color interpolation processing, contour enhancement processing, and Image processing such as noise reduction processing is performed, and image data after image processing is output.
The object detection unit 34a performs processing for detecting a subject element based on the second image data from the second processing unit 152, and outputs a detection result.
The setting unit 34b performs an imaging condition calculation process such as an exposure calculation process based on the second image data from the second processing unit 152, and based on the calculation result, the imaging screen by the imaging unit 32 is detected. While dividing into a plurality of regions including elements, imaging conditions are reset for the plurality of regions.
The AF calculation unit 34d performs focus detection processing based on the second signal data from the second processing unit 152, and drives for moving the focus lens of the imaging optical system 31 to the in-focus position based on the calculation result. Output a signal.

2. As another example, the first imaging condition set in the first area differs depending on the area of the imaging screen, and the second imaging condition set in the second area is the same in the entire second area of the imaging screen. This will be described with reference to FIG. FIG. 27 is a diagram schematically illustrating processing of the first image data and the second image data.

Each pixel included in the first region 141 outputs first image data captured under a first imaging condition that varies depending on the region of the imaging screen, and each pixel included in the second region 142 outputs the first image data of the imaging screen. Second image data imaged under the same second imaging condition in the entire two areas is output. The first image data from the first area 141 is output to the first processing unit 151. Similarly, the second image data from the second region 142 is output to the second processing unit 152.

As described above, in this example, the first imaging condition set in the first area differs depending on the area of the imaging screen. That is, the first imaging condition varies depending on the partial area in the first area. When different first imaging conditions are set for the target pixel P and the reference pixel located together in the first region, the first processing unit 151 performs the above-described processing on the first image data from the reference pixel. 1-2. A correction process similar to the correction process described above is performed. When the same first imaging condition is set for the target pixel P and the reference pixel, the first processing unit 151 does not perform the correction process on the first image data from the reference pixel.

In this example, since the second imaging condition set for the second area is the same for the entire second area of the imaging screen, the second processing unit 152 performs focus detection processing, subject detection processing, and exposure calculation processing. The second image data to be used is not corrected. For the second image data used for interpolation of the first image data, the second processing unit 152 calculates the difference between the image data due to the difference between the imaging condition for the target pixel P included in the first region and the second imaging condition. A correction process for reducing the size is performed. The second processing unit 152 outputs the second image data after the correction process to the first processing unit 151. Note that the second processing unit 152 may output the corrected second image data to the generation unit 323.
The second processing unit 152 uses the information 181 about the imaging condition for the pixel of interest P included in the first region necessary for reducing the difference between the image data due to the difference in the imaging condition, for example, the first processing unit 151. Receive from.

3. As another example, the first imaging condition set in the first area is the same in the entire first area of the imaging screen, and the second imaging condition set in the second area differs depending on the area of the imaging screen. The case will be described with reference to FIG. FIG. 28 is a diagram schematically showing processing of the first image data and the second image data.

From each pixel included in the first area 141, first image data captured under the same first imaging condition is output in the entire first area of the imaging screen, and from each pixel included in the second area 142. Second image data captured under different second imaging conditions depending on the area of the imaging screen is output. The first image data from the first area 141 is output to the first processing unit 151. Similarly, the second image data from the second region 142 is output to the second processing unit 152.

In this example, since the first imaging condition set in the first area is the same in the entire first area of the imaging screen, the first processing unit 151 performs the first image from the reference pixels included in the first area. Do not correct the data.

Further, in this example, since the second imaging condition set in the second area differs depending on the area of the imaging screen, the second processing unit 152 performs the correction process on the second image data as follows. For example, the second processing unit 152 performs the correction process on the second image data imaged under a certain imaging condition in the second image data, and the second image data after the correction process is described above. The difference from the second image data captured under another imaging condition different from the imaging condition is reduced.

In this example, for the second image data used for the interpolation of the first image data, the second processing unit 152 uses the image data based on the difference between the imaging condition for the target pixel P included in the first region and the second imaging condition. Correction processing is performed to reduce the difference between them. The second processing unit 152 outputs the second image data after the correction process to the first processing unit 151. Note that the second processing unit 152 may output the corrected second image data to the generation unit 323. In FIG. 26, the second image data after correction processing output to the first processing unit 151 is denoted by reference numeral 182, and the second image data after correction processing output to the generation unit 323 is denoted by reference numeral 183. It is shown with an attached.
The second processing unit 152 uses the information 181 about the imaging condition for the pixel of interest P included in the first region necessary for reducing the difference between the image data due to the difference in the imaging condition, for example, the first processing unit 151. Receive from.

Based on the first image data from the first processing unit 151 and the second image data corrected by the second processing unit 152, the generation unit 323 performs pixel defect correction processing, color interpolation processing, contour enhancement processing, and Image processing such as noise reduction processing is performed, and image data after image processing is output.
The object detection unit 34a detects the subject element based on the second image data captured under a certain imaging condition and the second image data captured under another imaging condition corrected by the second processing unit 152. Process and output the detection result.
The setting unit 34b performs exposure calculation processing or the like based on the second image data captured under a certain imaging condition and the second image data captured under another imaging condition, which is corrected by the second processing unit 152. An imaging condition calculation process is performed. Based on the calculation result, the setting unit 34b divides the imaging screen by the imaging unit 32 into a plurality of areas including the detected subject element, and resets the imaging conditions for the plurality of areas.
The AF calculation unit 34d performs focus detection processing based on the second signal data imaged under a certain imaging condition and the second signal data imaged under another imaging condition corrected by the second processing unit 152. The AF calculation unit 34d that performs the operation outputs a drive signal for moving the focus lens of the imaging optical system 31 to the in-focus position based on the calculation result.

4). Furthermore, as another example, a case where the first imaging condition set in the first area differs depending on the area of the imaging screen, and the second imaging condition set in the second area differs depending on the area of the imaging screen, as shown in FIG. Will be described with reference to FIG. FIG. 29 is a diagram schematically illustrating processing of the first image data and the second image data.

From each pixel included in the first area 141, first image data captured under a first imaging condition that varies depending on the area of the imaging screen is output. From each pixel included in the second area 142, an area on the imaging screen is output. The second image data imaged under different second imaging conditions is output. The first image data from the first area 141 is output to the first processing unit 151. Similarly, the second image data from the second region 142 is output to the second processing unit 152.

Further, in this example, since the second imaging condition set in the second area differs depending on the area of the imaging screen, the second processing unit 152 performs the above-described 3. processing on the second image data. Correction processing is performed as an example.

(Modification 14)
In the second embodiment described above, one of the correction units 322 corresponds to one of the blocks 111a (unit division). However, one of the correction units 322 may correspond to one of the composite blocks (composite sections) having a plurality of blocks 111a (unit sections). In this case, the correction unit 322 sequentially corrects image data from pixels belonging to the plurality of blocks 111a included in the composite block. Even if a plurality of correction units 322 are provided corresponding to each composite block having a plurality of blocks 111a, the correction processing of image data can be performed in parallel by the plurality of correction units 322. An appropriate image can be generated in a short time from the image data generated in the areas with different imaging conditions.

(Modification 15)
In the second embodiment described above, the generation unit 323 is provided inside the imaging unit 32A. However, the generation unit 323 may be provided outside the imaging unit 32A. Even if the generation unit 323 is provided outside the imaging unit 32A, the same operational effects as the above-described operational effects can be obtained.

(Modification 16)
In the second embodiment described above, the multilayer imaging element 100A includes image processing that performs the above-described preprocessing and image processing in addition to the backside illumination imaging chip 111, the signal processing chip 112, and the memory chip 113. A chip 114 is further provided. However, the image processing chip 114 may be provided in the signal processing chip 112 without providing the image processing chip 114 in the multilayer imaging device 100A.

(Modification 17)
In the second embodiment described above, the second processing unit 152 receives, from the first processing unit 151, information on the first imaging condition necessary to reduce the difference between the image data due to the difference in the imaging condition. did. In addition, the first processing unit 151 receives information about the second imaging condition necessary for reducing the difference between the image data due to the difference in the imaging condition from the second processing unit 152. However, the second processing unit 152 may receive information about the first imaging condition necessary for reducing the difference between the image data due to the difference in the imaging condition from the driving unit 32b or the control unit 34. Similarly, the first processing unit 151 may receive information about the second imaging condition necessary for reducing the difference between the image data due to the difference in the imaging condition from the driving unit 32b or the control unit 34.
In addition, you may combine each embodiment and modification which were mentioned above, respectively.

Although various embodiments and modifications have been described above, the present invention is not limited to these contents. Other embodiments conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.
The above-described embodiments and modifications also include the following imaging device and focus detection device.
(1) A first imaging region for imaging a subject and outputting a first signal via a lens movable in the optical axis direction of the optical system, and a second imaging region for imaging the subject and outputting a second signal An imaging device including: a setting unit that sets imaging conditions of the first imaging area to imaging conditions different from the imaging conditions of the second imaging area; and a second signal output from the second imaging area On the other hand, a correction unit that performs correction for use in interpolation of the first signal output from the first imaging region, and a signal obtained by interpolating the first signal with the second signal corrected by the correction unit. And a control unit that controls movement of the lens.
(2) a first imaging region that captures an image of a subject through a lens that adjusts a focus position of the optical system and outputs a first signal; and a second image that captures an image of the subject through the lens and outputs a second signal. An imaging device having two imaging areas, a setting unit for setting imaging conditions of the first imaging area to imaging conditions different from the imaging conditions of the second imaging area, and a first output from the second imaging area A correction unit that corrects two signals for use in interpolation of the first signal output from the first imaging area, and the first signal is interpolated by the second signal corrected by the correction unit. And a control unit that controls the driving of the lens according to the in-focus state of the optical system detected using the signal.
(3) In the imaging device as in (2), the contrast of the image of the subject imaged in the first imaging region by a signal obtained by interpolating the first signal with the second signal corrected by the correction unit. Based on this, the in-focus state of the optical system is detected.
(4) In the imaging apparatus as in (2) or (3), the correction unit uses the second imaging area as a correction to be used for interpolation of the first signal output from the first imaging area. The output second signal is corrected based on the imaging condition of the first imaging area or the imaging condition of the second imaging area.
(5) In the imaging apparatus as described in (2) or (3), the correction unit uses the second imaging area as a correction to be used for interpolation of the first signal output from the first imaging area. The output second signal is corrected based on the imaging condition of the first imaging area and the imaging condition of the second imaging area.
(6) In the imaging apparatus as in (5), the correction unit outputs the second output region from the second image pickup region as a correction for use in interpolation of the first signal output from the first image pickup region. The second signal is corrected based on the difference between the imaging condition of the first imaging area and the imaging condition of the second imaging area.
(7) In the imaging device as in (6), the imaging condition of the first imaging area and the imaging condition of the second imaging area are exposure conditions, and the correction unit outputs from the second imaging area. The corrected second signal is corrected based on the difference between the exposure condition of the first imaging region and the exposure condition of the second imaging region.
(8) In the imaging device as in (7), the exposure condition of the first imaging region and the exposure condition of the second imaging region are charge accumulation times of the light receiving unit in the imaging region, and the correction unit is The second signal output from the second imaging area is corrected based on the ratio between the charge accumulation time of the first imaging area and the charge accumulation time of the second imaging area.
(9) In the imaging apparatus as in (7), the exposure condition of the first imaging area and the exposure condition of the second imaging area are imaging sensitivities of the imaging area, and the correction unit includes the second imaging area. The second signal output from the area is corrected based on a logarithmic ratio between the imaging sensitivity of the first imaging area and the imaging sensitivity of the second imaging area.
(10) In the imaging device as in (2) or (3), the correction unit corrects the first signal output from the first imaging region and outputs the first signal output from the second imaging region. Two signals are corrected to be used for interpolation of the corrected first signal, and the control unit interpolates the corrected first signal by the second signal corrected by the correction unit. The driving of the lens is controlled by the in-focus state of the optical system detected using the signal.
(11) A first imaging region that captures an image of a subject through a lens that adjusts the focusing position of the optical system and outputs a first signal; and a second image that captures an image of the subject through the lens and outputs a second signal. An imaging device having two imaging areas, a setting unit for setting imaging conditions of the first imaging area to imaging conditions different from the imaging conditions of the second imaging area, and a first output from the second imaging area For the two signals, a correction unit that performs correction for use in interpolation of a pixel that outputs the first signal in the first imaging region, and the first signal is generated by the second signal corrected by the correction unit. An imaging apparatus comprising: a control unit that controls driving of the lens according to a focus state of the optical system detected using a signal obtained by interpolating pixels to be output.
(12) In the imaging device as in (11), the pixel that outputs the first signal in the first imaging region photoelectrically converts light of a first color out of light from the subject and outputs the first signal. The second imaging region photoelectrically converts light of a second color different from the first color out of light from the subject and outputs the second signal.
(13) A first imaging area for imaging a subject and outputting a first signal via a lens movable in the optical axis direction of the optical system; and a second imaging area for imaging the subject and outputting a second signal A setting unit that sets the imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area, and the second signal output from the second imaging area On the other hand, a correction unit that performs correction to reduce noise included in the first signal output from the first imaging region, and the second signal corrected by the correction unit converts the first signal into the first signal. An image pickup apparatus comprising: a control unit that controls movement of the lens using a signal with reduced noise.
(14) a first imaging region that captures an image of a subject through a lens that adjusts a focusing position of the optical system and outputs a first signal; and a second image that captures an image of the subject through the lens and outputs a second signal. An imaging device having two imaging areas, a setting unit that sets imaging conditions of the first imaging area to imaging conditions different from the imaging conditions of the second imaging area, and the output from the second imaging area A correction unit that performs correction for reducing noise included in the first signal output from the first imaging region with respect to the second signal, and the second signal corrected by the correction unit. An imaging apparatus comprising: a control unit that controls driving of the lens according to a focus state of the optical system detected using a signal in which noise included in one signal is reduced.
(15) a first imaging region that captures an image of a subject through a lens that adjusts a focusing position of the optical system and outputs a first signal; and a second image that captures an image of the subject through the lens and outputs a second signal. An imaging device having two imaging areas, a setting unit that sets imaging conditions of the first imaging area to imaging conditions different from the imaging conditions of the second imaging area, and the imaging conditions of the first imaging area or the above Using a correction unit that corrects the second signal output from the second imaging region based on an imaging condition of the second imaging region, and the first signal and the second signal corrected by the correction unit. And a control unit that controls driving of the lens according to the detected in-focus state of the optical system.
(16) a first imaging region that images a subject through a lens that adjusts a focus position of the optical system and outputs a first signal; and a second imaging unit that images the subject through the lens and outputs a second signal. An imaging device having two imaging areas, a setting unit that sets imaging conditions of the first imaging area to imaging conditions different from the imaging conditions of the second imaging area, imaging conditions of the first imaging area, and the above A correction unit that corrects the second signal output from the second imaging region based on an imaging condition of the second imaging region, and the first signal and the second signal corrected by the correction unit are used. And a control unit that controls the driving of the lens according to the in-focus state of the optical system detected in the above.
(17) In the imaging apparatus as in (16), the correction unit outputs the second image pickup area as a correction used for interpolation of the first signal output from the first image pickup area. The second signal is corrected based on the difference between the imaging condition of the first imaging area and the imaging condition of the second imaging area.
(18) In the imaging device as in (17), the imaging condition of the first imaging area and the imaging condition of the second imaging area are exposure conditions, and the correction unit outputs from the second imaging area. The corrected second signal is corrected based on the difference between the exposure condition of the first imaging region and the exposure condition of the second imaging region.
(19) In the imaging device as in (18), the exposure condition of the first imaging region and the exposure condition of the second imaging region are a charge accumulation time of the light receiving unit in the imaging region, and the correction unit is The second signal output from the second imaging area is corrected based on the ratio between the charge accumulation time of the first imaging area and the charge accumulation time of the second imaging area.
(20) In the imaging device as in (18), the exposure condition of the first imaging area and the exposure condition of the second imaging area are imaging sensitivity of the imaging area, and the correction unit includes the second imaging area. The second signal output from the area is corrected based on a logarithmic ratio between the imaging sensitivity of the first imaging area and the imaging sensitivity of the second imaging area.
(21) In the imaging apparatus as described in (16) to (20), the optical system incident on the imaging element, detected using the first signal and the second signal corrected by the correction unit. The in-focus state of the optical system is detected based on the shift of the plurality of images due to the plurality of lights passing through different portions.
(22) In the imaging apparatus as described in (16) to (20), the subject imaged by the imaging element detected using the first signal and the second signal corrected by the correction unit. The in-focus state of the optical system is detected based on the contrast of the image.
(23) a first imaging region that images a subject through a lens that adjusts a focus position of the optical system and outputs a first signal; and a second imaging unit that images the subject through the lens and outputs a second signal. An imaging device having two imaging areas, a setting unit that sets imaging conditions of the first imaging area to imaging conditions different from the imaging conditions of the second imaging area, and the imaging conditions of the first imaging area The correction unit corrects the first signal output from the first imaging area and corrects the second signal output from the second imaging area based on the setting value of the imaging condition of the second imaging area. And the optical system detected using a signal obtained by interpolating pixels that output the first signal corrected by the first signal corrected by the correction unit and the second signal corrected by the correction unit. Control the driving of the lens according to the in-focus state Imaging apparatus comprising: a control unit.
(24) a first imaging region that images a subject through a lens that adjusts the focusing position of the optical system and outputs a first signal; and a second imaging region that images the subject through the lens and outputs a second signal. An imaging device having two imaging areas, a setting unit for setting imaging conditions of the first imaging area to imaging conditions different from the imaging conditions of the second imaging area, and the output from the first imaging area A correction unit that corrects the first signal and corrects the second signal output from the second imaging region for use in interpolation of a pixel that outputs the corrected first signal; and the correction A control unit that controls driving of the lens according to a focus state of the optical system detected by using the first signal corrected by the correction unit and the second signal corrected by the correction unit. apparatus.
(25) In the imaging device as in (24), the pixel that outputs the first signal in the first imaging region photoelectrically converts the first color light out of the light from the subject, and outputs the first signal. The second imaging region photoelectrically converts light of a second color different from the first color out of light from the subject and outputs the second signal.
(26) Image the subject through the lens movable in the optical axis direction of the optical system and output the first signal. An imaging condition different from the imaging condition of the second imaging area of the imaging element that outputs the second signal is set, and the second signal output from the second imaging area is output from the first imaging area. And a control unit that controls the movement of the lens using a correction unit that performs correction for use in interpolation of the first signal, and a signal obtained by interpolating the first signal by the second signal corrected by the correction unit. A focus detection device.
(27) The imaging condition of the first imaging region of the imaging device that images the subject through a lens that adjusts the focus position of the optical system and outputs the first signal is the same as that obtained by imaging the subject through the lens. The imaging condition that is different from the imaging condition of the second imaging area of the imaging element that outputs two signals is output from the first imaging area with respect to the second signal output from the second imaging area. A correction unit that performs correction for use in interpolation of the first signal and a second signal output from the second imaging region are used for interpolation of the first signal output from the first imaging region. And a driving unit for controlling the driving of the lens according to a focus state of the optical system detected using a signal obtained by interpolating the first signal with the second signal corrected by the correcting unit. And a control unit.
(28) The imaging condition of the first imaging region of the imaging device that images the subject through a lens movable in the optical axis direction of the optical system and outputs the first signal, and the subject is imaged through the lens. An imaging condition different from the imaging condition of the second imaging area of the imaging element that outputs the second signal is set, and the second signal output from the second imaging area is output from the first imaging area. A correction unit that performs correction to reduce noise included in the first signal, and a signal in which noise included in the first signal is reduced by the second signal corrected by the correction unit. And a control unit that controls movement of the lens.
(29) The imaging condition of the first imaging area of the imaging device that images the subject through a lens that adjusts the focusing position of the optical system and outputs the first signal is set as the imaging condition of the subject through the lens. The imaging condition that is different from the imaging condition of the second imaging area of the imaging element that outputs two signals is output from the first imaging area with respect to the second signal output from the second imaging area. In-focus state of the optical system detected using a correction unit that performs correction to reduce noise included in the first signal, and the first signal and the second signal corrected by the correction unit And a control unit for controlling the driving of the lens.
(30) A first region in which light incident through the optical system is imaged under a first imaging condition to generate first signal data, and the incident light is subjected to a second imaging condition different from the first imaging condition. A second region that images and generates second signal data; a correction unit that corrects the first signal data generated by the imaging unit based on the second imaging condition; A generating unit that generates a signal for driving the optical system based on the first signal data corrected based on the correcting unit and the second signal data generated by the imaging unit; Imaging device.
(31) Imaging light incident on the second area of the imaging unit using first signal data generated by imaging light incident on the first area of the imaging unit via the optical system under the first imaging condition A correction unit that corrects based on a second imaging condition that is different from the first imaging condition, the first signal data corrected by the correction unit, and light incident on the second region. And a generating unit that generates a signal for driving the optical system based on the second signal data.

Further, the above-described embodiments and modifications also include the following imaging device and focus detection device.
(1) A first region for imaging light incident through an optical system under a first imaging condition to generate first signal data; and a second imaging condition for the incident light different from the first imaging condition. A second region that images and generates second signal data; a correction unit that corrects the first signal data generated by the imaging unit based on the second imaging condition; A generating unit that generates a signal for driving the optical system based on the first signal data corrected based on the correcting unit and the second signal data generated by the imaging unit; Imaging device.
(2) In the imaging apparatus as in (1), the generation unit generates a signal for driving the focus lens of the optical system as a signal for driving the optical system.
(3) In the imaging device as in (1) or (2), the correction unit uses the value of the first signal data and the value of the second signal data as the first signal data generated by the imaging unit. Correct so that the difference from the value is small.
(4) In the imaging device as in (1) to (3), the correction unit converts the first signal data generated by the imaging unit into a difference between the first imaging condition and the second imaging condition. Correct based on.
(5) In the imaging device according to (1) to (4), the correction unit corrects the second signal data generated by the imaging unit based on the first imaging condition, and the generation unit Generates a signal for driving the optical system based on the first signal data corrected by the correction unit and the second signal data corrected by the correction unit.
(6) In the imaging apparatus as described in (1) to (5), the correction unit determines the value of the second signal data, the value of the corrected second signal data, and the value of the corrected first signal data. The generation unit drives the optical system based on the first signal data corrected by the correction unit and the second signal data corrected by the correction unit. To generate a signal for
(7) In the imaging device as described in (1) to (6), the generation unit is based on a shift of a plurality of images due to a plurality of lights that have passed through different pupil regions of the optical system incident on the imaging unit. A signal for driving the optical system is generated.
(8) In the imaging apparatus as described in (1) to (5), the generation unit generates a signal for driving the optical system based on a contrast of an image by light received by the imaging unit.
(9) In the imaging device as in (1) to (8), the generation unit generates a signal for driving the optical system for a partial region of the imaging unit, and the first region and the The second area is included in the partial area.
(10) In the imaging apparatus as described in (1) to (9), the correction unit generates the first light generated by imaging the light incident on the first region by the imaging unit in a first accumulation time. The signal data is corrected based on a second accumulation time that is a charge accumulation time for imaging the light incident on the second region.
(11) In the imaging apparatus as in (10), the correction unit is configured to capture the first signal data generated by imaging the light incident on the first region with the imaging unit in a first accumulation time. Correction is performed such that the difference from the second signal data generated by imaging the light incident on the second region by the imaging unit in the second accumulation time becomes small.
(12) In the imaging device as in (5) to (11), the correction unit generates the first image generated by imaging the light incident on the first region with the first imaging sensitivity by the imaging unit. The signal data is corrected based on a second imaging sensitivity that is an imaging sensitivity for imaging the light incident on the second region.
(13) In the imaging apparatus as in (12), the correction unit is configured to capture the first signal data generated by imaging the light incident on the first region with the first imaging sensitivity by the imaging unit. Correction is performed so that a difference from the second signal data generated by imaging the light incident on the second region with the second imaging sensitivity is reduced by the imaging unit.
(14) Imaging light incident on the second region of the imaging unit using first signal data generated by imaging light incident on the first region of the imaging unit via the optical system under the first imaging condition A correction unit that corrects based on a second imaging condition that is different from the first imaging condition, the first signal data corrected by the correction unit, and light incident on the second region. And a generating unit that generates a signal for driving the optical system based on the second signal data.
(15) In the focus detection device as in (14), the generation unit generates a signal for driving the focus lens of the optical system as a signal for driving the optical system.
(16) In the focus detection device as in (14) or (15), the correction unit may reduce the difference between the value of the first signal data and the value of the second signal data for the first signal data. Correct so that
(17) In the focus detection device as in (14) to (16), the correction unit corrects the first signal data based on a difference between the first imaging condition and the second imaging condition.
(18) In the focus detection device as in (14) to (17), the correction unit corrects the second signal data based on the first imaging condition, and the generation unit is the correction unit. Based on the corrected first signal data and the second signal data corrected by the correction unit, a signal for driving the optical system is generated.
(19) In the focus detection device as described in (14) to (18), the correction unit sets the value of the second signal data to the value of the corrected second signal data and the corrected first signal data. The generation unit corrects the optical system based on the first signal data corrected by the correction unit and the second signal data corrected by the correction unit. A signal for driving is generated.
(20) In the focus detection device as described in (14) to (19), the generation unit is based on a shift of a plurality of images due to a plurality of lights that have passed through different pupil regions of the optical system incident on the imaging unit. Then, a signal for driving the optical system is generated.
(21) In the focus detection device as in (14) to (19), the generation unit generates a signal for driving the optical system based on a contrast of an image by light received by the imaging unit.
(22) In the focus detection device as described in (14) to (21), the generation unit generates a signal for driving the optical system for a partial region of the imaging unit, and the first region and The second area is included in the partial area.
(23) In the focus detection device as described in (14) to (22), the correction unit may use the first signal data generated by imaging the light incident on the first region with a first accumulation time. The correction is made based on the second accumulation time which is the charge accumulation time for imaging the light incident on the second region.
(24) In the focus detection apparatus as described in (23), the correction unit uses the first signal data generated by imaging the light incident on the first region in a first accumulation time as the second signal data. Correction is made so that the difference from the second signal data generated by imaging the light incident on the region in the second accumulation time becomes small.
(25) In the focus detection device as described in (14) to (24), the correction unit uses the first signal data generated by imaging the light incident on the first region with a first imaging sensitivity. The correction is made based on the second imaging sensitivity, which is the imaging sensitivity for imaging the light incident on the second region.
(26) In the focus detection device as described in (25), the correction unit converts the first signal data generated by imaging the light incident on the first region with the first imaging sensitivity to the second signal data. Correction is performed so that the difference from the second signal data generated by imaging the light incident on the region with the second imaging sensitivity is reduced.
(27) In the imaging device as in (1) to (13), the correction unit corrects the first signal data generated by imaging light incident on the first region under the first imaging condition. And a second correction unit that corrects the second signal data generated by imaging the light incident on the second region under the second imaging condition. The correction unit corrects the first signal data based on an imaging condition of the second region, and the generation unit corrects the first signal data corrected by the first correction unit and the second signal data. A signal for driving the optical system is generated based on the signal data.
(28) In the imaging apparatus as in (27), the first correction unit may reduce the difference between the value of the first signal data and the value of the second signal data in the first signal data. To correct.
(29) In the imaging device as in (27) or (28), the first correction unit corrects the first signal data based on a difference between the first imaging condition and the second imaging condition. To do.
(30) In the imaging apparatus as in (27) to (29), the second correction unit corrects the second signal data based on the imaging condition of the first region, and the generation unit includes: A signal for driving the optical system is generated based on the first signal data corrected by the first correction unit and the second signal data corrected by the second correction unit.
(31) In the imaging device as described in (27) to (30), the second correction unit corrects the second signal data with the first signal data, and the generation unit performs the first correction. A signal for driving the optical system is generated based on the first signal data corrected by the second correction unit and the second signal data corrected by the second correction unit.
(32) In the imaging device as described in (27) to (31), the imaging unit is provided on a first semiconductor substrate, and the first correction unit and the second correction unit are a second semiconductor substrate. Is provided.
(33) In the imaging device as in (32), the first semiconductor substrate and the second semiconductor substrate are stacked.

The disclosure of the following priority application is hereby incorporated by reference.
Japanese Patent Application No. 2015-194614 (filed on Sep. 30, 2015)

DESCRIPTION OF

SYMBOLS

1,1C ... Camera 1B ... Imaging system 32 ...

Imaging part

32a, 100 ... Imaging element 33 ... Image processing part 33a, 321 ... Input part 33b, 322 ... Correction part 33c, 323 ... Generation part 34 ... Control part 34a ... Object detection Unit 34b ... Setting unit 34c ... Imaging control unit 34d ... AF calculation unit 35 ... Display unit 90 ... Predetermined range 1001 ... Imaging device 1002 ... Display device P ... Pixel of interest

Claims

A first imaging region for imaging a subject and outputting a first signal via a lens movable in the optical axis direction of the optical system, and a second imaging region for imaging the subject and outputting a second signal An image sensor;
A setting unit for setting the imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area;
A correction unit that performs correction for use in interpolation of the first signal output from the first imaging region, with respect to the second signal output from the second imaging region;
A control unit for controlling movement of the lens using a signal obtained by interpolating the first signal with the second signal corrected by the correction unit;
An imaging apparatus comprising:
A first imaging region that images a subject through a lens that adjusts the focus position of the optical system and outputs a first signal, and a second imaging region that images a subject through the lens and outputs a second signal An image sensor comprising:
A setting unit for setting the imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area;
A correction unit that performs correction for use in interpolation of the first signal output from the first imaging region, with respect to the second signal output from the second imaging region;
A control unit for controlling driving of the lens according to a focus state of the optical system detected using a signal obtained by interpolating the first signal with the second signal corrected by the correction unit;
An imaging apparatus comprising:
Based on a signal obtained by interpolating the first signal with the second signal corrected by the correction unit, the in-focus state of the optical system is detected based on the contrast of the image of the subject imaged in the first imaging area. The imaging device according to claim 2.
The correction unit is configured to correct the first signal output from the first imaging region with respect to the second signal output from the second imaging region as a correction to be used for interpolation of the first signal output from the first imaging region. The imaging apparatus according to claim 2 or 3, wherein the correction is performed based on an imaging condition or an imaging condition of the second imaging area.
The correction unit is configured to correct the first signal output from the first imaging region with respect to the second signal output from the second imaging region as a correction to be used for interpolation of the first signal output from the first imaging region. The imaging apparatus according to claim 2 or 3, wherein correction is performed based on an imaging condition and an imaging condition of the second imaging area.
The correction unit is configured to correct the first signal output from the first imaging region with respect to the second signal output from the second imaging region as a correction to be used for interpolation of the first signal output from the first imaging region. The imaging apparatus according to claim 5, wherein correction is performed based on a difference between an imaging condition and an imaging condition of the second imaging region.
The imaging conditions of the first imaging area and the imaging conditions of the second imaging area are exposure conditions,
The correction unit corrects the second signal output from the second imaging region based on a difference between an exposure condition of the first imaging region and an exposure condition of the second imaging region. 6. The imaging device according to 6.
The exposure condition of the first imaging region and the exposure condition of the second imaging region are the charge accumulation time of the light receiving unit in the imaging region,
The correction unit corrects the second signal output from the second imaging area based on a ratio between a charge accumulation time of the first imaging area and a charge accumulation time of the second imaging area. The imaging device according to claim 7.
The exposure condition of the first imaging area and the exposure condition of the second imaging area are imaging sensitivity of the imaging area,
The correction unit corrects the second signal output from the second imaging region based on a logarithmic ratio between the imaging sensitivity of the first imaging region and the imaging sensitivity of the second imaging region. Item 8. The imaging device according to Item 7.
The correction unit corrects the first signal output from the first imaging area, and uses the first signal for interpolation of the corrected first signal with respect to the second signal output from the second imaging area. Make corrections for
The said control part controls the drive of the said lens by the focusing state of the said optical system detected using the signal which interpolated the said 1st signal correct | amended by the said 2nd signal correct | amended by the said correction | amendment part. Item 4. The imaging device according to Item 2 or 3.
A first imaging region that images a subject through a lens that adjusts the focus position of the optical system and outputs a first signal, and a second imaging region that images a subject through the lens and outputs a second signal An image sensor comprising:
A setting unit for setting the imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area;
A correction unit that performs correction for use in interpolation of a pixel that outputs the first signal in the first imaging region, with respect to the second signal output from the second imaging region;
A control unit that controls driving of the lens according to a focus state of the optical system detected using a signal obtained by interpolating a pixel that outputs the first signal based on the second signal corrected by the correction unit;
An imaging apparatus comprising:
The pixel that outputs the first signal in the first imaging region photoelectrically converts light of a first color out of light from a subject and outputs the first signal.
The imaging device according to claim 11, wherein the second imaging region photoelectrically converts light of a second color different from the first color from light from a subject and outputs the second signal.
A first imaging region for imaging a subject and outputting a first signal via a lens movable in the optical axis direction of the optical system, and a second imaging region for imaging the subject and outputting a second signal An image sensor;
A setting unit for setting the imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area;
A correction unit that performs correction for reducing noise included in the first signal output from the first imaging region, with respect to the second signal output from the second imaging region;
A control unit for controlling movement of the lens using a signal obtained by reducing noise included in the first signal by the second signal corrected by the correction unit;
An imaging apparatus comprising:
A first imaging region that images a subject through a lens that adjusts the focus position of the optical system and outputs a first signal, and a second imaging region that images a subject through the lens and outputs a second signal An image sensor comprising:
A setting unit for setting the imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area;
A correction unit that performs correction for reducing noise included in the first signal output from the first imaging region, with respect to the second signal output from the second imaging region;
A control unit that controls driving of the lens according to a focus state of the optical system detected using a signal obtained by reducing noise included in the first signal by the second signal corrected by the correction unit;
An imaging apparatus comprising:
A first imaging region that images a subject through a lens that adjusts the focus position of the optical system and outputs a first signal, and a second imaging region that images a subject through the lens and outputs a second signal An image sensor comprising:
A setting unit for setting the imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area;
A correction unit that corrects the second signal output from the second imaging area based on the imaging condition of the first imaging area or the imaging condition of the second imaging area;
A control unit that controls driving of the lens according to a focus state of the optical system detected using the first signal and the second signal corrected by the correction unit;
An imaging apparatus comprising:
A first imaging region that images a subject through a lens that adjusts the focus position of the optical system and outputs a first signal, and a second imaging region that images a subject through the lens and outputs a second signal An image sensor comprising:
A setting unit for setting the imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area;
A correction unit that corrects the second signal output from the second imaging area based on the imaging condition of the first imaging area and the imaging condition of the second imaging area;
A control unit that controls driving of the lens according to a focus state of the optical system detected using the first signal and the second signal corrected by the correction unit;
An imaging apparatus comprising:
The correction unit is configured to correct the first signal output from the first imaging region with respect to the second signal output from the second imaging region as a correction to be used for interpolation of the first signal output from the first imaging region. The imaging apparatus according to claim 16, wherein correction is performed based on a difference between an imaging condition and an imaging condition of the second imaging area.
The imaging conditions of the first imaging area and the imaging conditions of the second imaging area are exposure conditions,
The correction unit corrects the second signal output from the second imaging region based on a difference between an exposure condition of the first imaging region and an exposure condition of the second imaging region. 17. The imaging device according to 17.
The exposure condition of the first imaging region and the exposure condition of the second imaging region are the charge accumulation time of the light receiving unit in the imaging region,
The correction unit corrects the second signal output from the second imaging area based on a ratio between a charge accumulation time of the first imaging area and a charge accumulation time of the second imaging area. The imaging device according to claim 18.
The exposure condition of the first imaging area and the exposure condition of the second imaging area are imaging sensitivity of the imaging area,
The correction unit corrects the second signal output from the second imaging region based on a logarithmic ratio between the imaging sensitivity of the first imaging region and the imaging sensitivity of the second imaging region. Item 19. The imaging device according to Item 18.
Based on displacement of a plurality of images due to a plurality of lights detected using the first signal and the second signal corrected by the correction unit and having passed through different portions of the optical system incident on the image sensor. The imaging device according to any one of claims 16 to 20, wherein an in-focus state of the optical system is detected.
The in-focus state of the optical system is detected based on the contrast of the image of the subject imaged by the imaging element detected using the first signal and the second signal corrected by the correction unit. The imaging device according to any one of claims 16 to 20.
A first imaging region that images a subject through a lens that adjusts the focus position of the optical system and outputs a first signal, and a second imaging region that images a subject through the lens and outputs a second signal An image sensor comprising:
A setting unit for setting the imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area;
The first signal output from the first imaging area is corrected based on the imaging condition of the first imaging area, and is output from the second imaging area based on the setting value of the imaging condition of the second imaging area. A correction unit for correcting the second signal;
A combination of the optical system detected using a signal obtained by interpolating pixels that output the first signal corrected by the first signal corrected by the correction unit and the second signal corrected by the correction unit. A control unit for controlling the driving of the lens according to a focus state;
An imaging apparatus comprising:
A first imaging region that images a subject through a lens that adjusts the focus position of the optical system and outputs a first signal, and a second imaging region that images a subject through the lens and outputs a second signal An image sensor comprising:
A setting unit for setting the imaging condition of the first imaging area to an imaging condition different from the imaging condition of the second imaging area;
In order to correct the first signal output from the first imaging region and use it for interpolation of a pixel that outputs the corrected first signal with respect to the second signal output from the second imaging region A correction unit for correcting
A control unit for controlling driving of the lens according to a focus state of the optical system detected using the first signal corrected by the correction unit and the second signal corrected by the correction unit;
An imaging apparatus comprising:
The pixel that outputs the first signal in the first imaging region photoelectrically converts light of a first color out of light from a subject and outputs the first signal.
25. The imaging apparatus according to claim 24, wherein the second imaging region photoelectrically converts light of a second color different from the first color from light from a subject and outputs the second signal.
An imaging condition of a first imaging region of an imaging device that images a subject through a lens that can move in the optical axis direction of the optical system and outputs a first signal, and a second signal by imaging the subject through the lens. Is set to an imaging condition different from the imaging condition of the second imaging area of the imaging element, and the second signal output from the second imaging area is output from the first imaging area. A correction unit for performing correction for use in interpolation of one signal;
A control unit for controlling movement of the lens using a signal obtained by interpolating the first signal with the second signal corrected by the correction unit;
A focus detection apparatus.
The imaging condition of the first imaging region of the imaging device that images the subject through a lens that adjusts the focus position of the optical system and outputs the first signal, and the second signal by imaging the subject through the lens The first imaging signal output from the first imaging region is set to an imaging condition different from the imaging condition of the second imaging region of the imaging element to be output and the second signal output from the second imaging region is output. A correction unit for performing correction for use in signal interpolation;
A correction unit that performs correction for use in interpolation of the first signal output from the first imaging region, with respect to the second signal output from the second imaging region;
A control unit for controlling driving of the lens according to a focus state of the optical system detected using a signal obtained by interpolating the first signal with the second signal corrected by the correction unit;
A focus detection apparatus.
An imaging condition of a first imaging region of an imaging device that images a subject through a lens that can move in the optical axis direction of the optical system and outputs a first signal, and a second signal by imaging the subject through the lens. Is set to an imaging condition different from the imaging condition of the second imaging area of the imaging element, and the second signal output from the second imaging area is output from the first imaging area. A correction unit that performs correction to reduce noise included in one signal;
A control unit for controlling movement of the lens using a signal obtained by reducing noise included in the first signal by the second signal corrected by the correction unit;
A focus detection apparatus.
The imaging condition of the first imaging region of the imaging device that images the subject through a lens that adjusts the focus position of the optical system and outputs the first signal, and the second signal by imaging the subject through the lens The first imaging signal output from the first imaging region is set to an imaging condition different from the imaging condition of the second imaging region of the imaging element to be output and the second signal output from the second imaging region is output. A correction unit that performs correction to reduce noise included in the signal;
A control unit that controls driving of the lens according to a focus state of the optical system detected using the first signal and the second signal corrected by the correction unit;
A focus detection apparatus.
A first region for imaging light incident through an optical system under a first imaging condition to generate first signal data; and imaging the incident light under a second imaging condition different from the first imaging condition. An imaging unit having a second region for generating second signal data;
A correction unit that corrects the first signal data generated by the imaging unit based on the second imaging condition;
A generation unit that generates a signal for driving the optical system based on the first signal data corrected based on the correction unit and the second signal data generated by the imaging unit; An imaging apparatus provided.
The first signal data generated by imaging the light incident on the first region of the imaging unit via the optical system under the first imaging condition is used to image the light incident on the second region of the imaging unit. A correction unit configured to correct based on a second imaging condition different from the first imaging condition;
A signal for driving the optical system is generated based on the first signal data corrected by the correction unit and second signal data generated by imaging light incident on the second region. A focus detection device.