JP2020088447A - Imaging device and control method thereof - Google Patents

Abstract

To provide an imaging device and a control method thereof which can reduce the influence of a time required for the change on operation of the imaging device when a reading method of an imaging element needs to be changed.SOLUTION: For example, focus detection information of a photographing lens is generated on the basis of second image data acquired from an imaging element, and a reading method of the imaging element is changed when display image data is generated on the basis of first image data acquired from the imaging element. At this time, the reading method for acquiring the first image data is changed, and the display image data is generated on the basis of the second image data.SELECTED DRAWING: Figure 3

Description

The present invention relates to an image pickup device and a control method thereof.

Conventionally, in a digital (video) camera, it is known to acquire signals for various applications from an image sensor. Patent Document 1 discloses an image sensor in which a plurality of pixels are divided into a first pixel group and a second pixel group for each row and can be read out. Then, a technique is disclosed in which an image signal obtained from the first pixel group and an image signal obtained from the second pixel group are switched for the same purpose and for different purposes.

JP, 2014-143667, A

In the technique of Patent Document 1, by making the reading methods (charge accumulation time and frame rate) of the first pixel group and the second pixel group different, it is possible to obtain an image signal suitable for two purposes. However, when an image signal suitable for another purpose is required, it is necessary to change the reading method of any pixel group. Since the image signal cannot be obtained during the change of the reading method, the display may be stopped or the response of the image pickup apparatus may be deteriorated (for example, shutter time lag).

The present invention has been made in view of such problems of the conventional art. An object of the present invention is to provide an image pickup apparatus and a control method thereof that can reduce the influence of the time required for the change on the operation of the image pickup apparatus when it is necessary to change the reading method of the image pickup element. Especially.

The above-mentioned object is to obtain the first image data and the second image data from the image pickup device, and to generate the information for focus detection of the photographing lens based on the second image data, and to obtain the first image. It has a signal processing means for generating image data for display based on the data, and a control means for controlling the reading method of the image sensor and the operation of the signal processing means, and the control means changes the read method of the image sensor. In this case, the reading method for obtaining the first image data is changed, and the signal processing means is controlled so as to generate the image data for display based on the second image data. Achieved by the device.

According to the present invention, it is possible to provide an image pickup apparatus and a control method thereof, which can reduce the influence of the time required for the change on the operation of the image pickup apparatus when the reading method of the image pickup element needs to be changed. You can

FIG. 3 is a block diagram showing a functional configuration example of a digital camera as an example of an image pickup apparatus according to an embodiment. Block diagram showing a functional configuration example of the image sensor of FIG. Timing chart of control operation example according to the embodiment Flowchart of control operation example according to the embodiment FIG. 3 is a block diagram showing a functional configuration example of a digital camera according to a modified example of the embodiment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In addition, below, the digital camera as an example of an imaging device based on embodiment of this invention is demonstrated. However, the present invention is applicable to any electronic device or machine that can use an image sensor. Such electronic devices and machines include, but are not limited to, personal computers, tablet computers, media players, PDAs, game consoles, robots, home appliances, automobiles, and the like.

FIG. 1 is a block diagram showing a functional configuration example of a digital camera 100 (hereinafter, simply referred to as camera 100) according to the present embodiment. In the present embodiment, the camera 100 is configured such that the taking lens 120 can be attached and detached via the lens mount 102, but the taking lens 120 may not be detachable.

The taking lens 120 is an optical system that forms an optical image of a subject on the image sensor 110. The lens 101 includes a plurality of lenses including movable lenses such as a focus lens and a variable power lens, a diaphragm with a variable aperture size, and a variable lens and diaphragm driving circuit. The lens controller 141 has a processor (computer), a ROM, and a RAM. The lens control unit 141 controls the operation of the lens 101 including the control of the drive circuit by reading the program stored in the ROM into the RAM and executing the program by the processor. The power of the taking lens 120 is supplied from the camera body through the lens mount 102. Further, the lens control unit 141 and a camera control unit 131, which will be described later, can communicate bidirectionally through the lens mount 102.

The shutter 103 is a focal plane shutter that adjusts the exposure time of the image sensor 110 when capturing a still image. The exposure time of the image sensor 110 may be adjusted by an electronic shutter (drive control of the image sensor 110).

The image sensor 110 includes a plurality of pixels (pixel group) arranged in a matrix. Each pixel is provided with, for example, a color filter, a microlens, a photoelectric conversion unit, and the like. The image pickup device 110 converts an optical image formed on the image pickup surface by the lens 101 into an electric signal (pixel signal) by a plurality of pixels. In this embodiment, the image sensor 110 includes an AD converter and converts a pixel signal into digital data. Further, the image sensor 110 can output the pixel signal read from the pixel group in two.

Details of the image sensor 110 will be described with reference to FIG. FIG. 2 is a diagram showing an example of the circuit configuration of the image sensor 110 using functional blocks. The image sensor 110 includes a pixel group 201, a row scanning circuit 202, a column ADC block 203, a column scanning circuit 204, a selector 205, a frame memory 206, an image conversion unit 207, and a parallel/serial conversion unit (P/S conversion unit) 208. Have.

Each of the plurality of pixels forming the pixel group 201 stores an electric charge according to the intensity of light incident during the exposure period. A column ADC block 203 that has a pixel (pixel signal) selected by the row scanning circuit 202 on a row-by-row basis and has a voltage (pixel signal) obtained by converting charges accumulated in the selected pixel, which is provided for each pixel column. AD conversion with. Then, the AD converters in the column ADC block 203 are selected one by one by the column scanning circuit 204 and the pixel signals are read out to acquire a digitized pixel data group (image data) for one pixel row. be able to.

The selector 205 can sort the area in which the read pixel data is stored in the frame memory 206 in conjunction with the operation of the column scanning circuit 204. The selector 205 switches the write address so that the data in the 4n (n is an integer of 0 or more) and 4n+1 columns and the data in the 4n+2 and 4n+3 columns are stored from different start addresses in the frame memory 206, for example. .. In this way, the image sensor 110 can acquire two types of image data in parallel. In the present embodiment, the two types of image data are referred to as main data and sub data, moving image data having main data as a frame is called a main stream, and moving image data having sub data as a frame is called a sub stream. Note that how to allocate pixel data to main data and sub data is not limited to the above example.

In the image sensor 110, individual reading methods (charge accumulation time, frame rate, presence/absence of addition reading, etc.) can be set for the pixel rows for main data and the pixel rows for sub data. The reading method of the image sensor 110 can be controlled by a timing control signal provided to the image sensor 110 by the timing generation unit 142. Therefore, by controlling the timing generation unit 142 by the camera control unit 131, it is possible to change the reading method of the pixel row for main data and/or the pixel row for sub data. For example, the timing control pattern corresponding to a plurality of reading methods of the image pickup device 110 is registered in the timing generation unit 142 in advance, and the timing control pattern is designated from the camera control unit 131 to change the reading method of the image pickup device 110. May be.

The image conversion unit 207 can apply conversion processing such as resizing processing to the main stream and sub stream frames read from the frame memory 206.

The P/S conversion unit 208 performs parallel/serial conversion, and outputs the image data converted into serial data from the image sensor 110. The P/S conversion unit 208 can output the main stream to the main lane 111 and the substream to the sublane 112. As shown in FIG. 1, the main lane 111 and the sub lane 112 are signal paths that connect the image sensor 110 and the signal processing unit 121. The P/S conversion unit 208 can output the main stream and the substream in parallel.

The signal processing unit 121 applies predetermined image processing to the image data (frames of the main stream and the sub stream) input through the main lane 111 and the sub lane 112. Here, the image processing applied by the signal processing unit 121 includes correction processing such as white balance adjustment, color interpolation, color correction, γ conversion, edge enhancement, resolution conversion, and noise reduction. The signal processing unit 121 can generate display image data from the image data after the image processing. The display image data can be generated, for example, by matching the resolution of the image data after the image processing with the resolution of the display area of the display unit 153. When the read resolution is equal to the display resolution, the image data after the image processing may be used as it is as the display image data. The display image data may be generated by another method.

Further, the signal processing unit 121 can also apply analysis processing such as acquisition of image brightness and contrast information, detection and/or recognition of a subject to the image data after the image processing. The information obtained by the analysis process can be used for automatic exposure control (AE) or automatic focus detection (AF), for example. When the image sensor 110 has focus detection pixels, the signal processing unit 121 can generate a pair of image signals for performing AF of the phase difference detection method through analysis processing. It should be noted that the image processing listed here is merely an example of the analysis processing, and not all of them are essential, and other processing may be applied.

The signal processing unit 121 can apply the same processing to the main stream and the sub stream. The signal processing unit 121 outputs the main stream and the sub stream to which the processing has been applied to the memory 132 via the bus 150. Further, the signal processing unit 121 outputs the information obtained by the analysis processing to the camera control unit 131 via the bus 150.

The memory 132 is a system memory used for temporarily storing image data and the like, a program executed by the camera control unit 131, a variable value during execution of the program, and the like. The memory 132 is also used as a VRAM that stores image data for display.

The non-volatile memory 133 stores programs executed by the camera control unit 131, GUI data, various set values, and the like. The nonvolatile memory 133 may be rewritable.
The timing generation unit 142 generates and provides a signal for controlling the operation of the image sensor 110, the signal processing unit 121, and the like.
The bus 150 provides a communication path for communicating data, control signals, etc. between connected components.

The display unit 153 is, for example, a color liquid crystal display, and is used for displaying a captured image, various information of the camera 100, a GUI screen, and the like. By continuously displaying the moving image on the display unit 153 while capturing the moving image, the display unit 153 can function as an electronic viewfinder (EVF). The display image for causing the display unit 153 to function as an EVF is also called a live view image. The display unit 153 is provided with a touch panel 156 and functions as a touch display. The camera control unit 131 can detect the position and type of operation on the touch panel 156.

The display control unit 151 converts the display image data stored in the VRAM area of the memory 132 into a D/A conversion unit 152 and/or HDMI (registered) according to a signal supplied from the timing generation unit 142 via the bus 150. (Trademark) output terminal 155. The D/A conversion unit 152 converts the image data into an analog image signal for display and outputs the analog image signal to the display unit 153 and/or the VIDEO output terminal 154.

The card input/output unit 171 can record data in a recording medium 173 (for example, a memory card) that is removably inserted in the card slot 172, or read data recorded in the recording medium 173.

The light emission control unit 181 controls the light emission pattern and the light emission amount of the built-in flash 182 and/or the external flash 183 according to an instruction from the camera control unit 131.
The operation unit 161 is a general term for switches, buttons, dials, etc. provided on the housing of the camera 100. The operation unit 161 generally includes, for example, a power switch, a release button, a release switch, a direction key, a determination (SET) button, a menu button, etc., but is not limited thereto. The release switch has a first switch SW1 that is turned on in response to a half-press operation of the release button and a second switch SW2 that is turned on in response to a full-press operation. The control unit 131 recognizes that SW1 is ON as a still image shooting preparation instruction and SW2 is as a still image shooting start instruction, and performs shooting preparation processing (AE, AF, etc.) and shooting processing (exposure, recording, etc.). Do each.
The power supply 160 supplies power to each unit of the camera 100.

The camera control unit 131 has a processor such as a CPU, reads a program stored in the non-volatile memory 133 into the memory 132, executes the program, and controls the operation of each unit of the camera 100 via the bus 150, thereby controlling the operation of the camera 100. Realize the function. In the present embodiment, the camera control unit 131 realizes control of each unit of the camera 100 through the lens control unit 141, the timing generation unit 142, the signal processing unit 121, the display control unit 151, and the light emission control unit 181. However, the camera control unit 131 may directly control each unit of the camera 100. Alternatively, the camera control unit 131 may not be provided, and each unit of the camera 100 may be controlled by the control unit and the processing unit described above performing control (processing) in cooperation with each other.

The camera control unit 131 can also execute AE and AF using the information acquired by the signal processing unit 121 by the analysis processing. For example, the camera control unit 131 can determine the exposure conditions such as the shutter speed, the aperture value, the photographing sensitivity, and the flash emission amount based on the exposure control setting and the image brightness information. Further, the camera control unit 131 can adjust the focus of the interchangeable lens 120 by driving the focus lens included in the lens 101 based on the contrast information and the phase difference between the image signals. When the subject such as a face is detected in the analysis process, the detection result can be used for AE and AF. A known technique can be used for the AE and AF operations performed by the camera control unit 131, and thus description thereof will be omitted.

Next, the timing control from the standby state of still image shooting to the start of shooting in the camera 100 will be described with reference to the timing chart of FIG. 3 and the flowchart of FIG. The standby state for still image shooting is a state in which the power switch of the camera 100 is ON, the operation mode of the camera 100 is set to the shooting mode, and the first switch SW1 and the second switch SW2 are both OFF. Further, it is assumed that the flash needs to be turned on during recording, for example, the forced light emission mode of the flash is set.

In the standby state for still image shooting, the control unit 131 starts moving image shooting (S101) and executes the following processes in parallel.
-Processing using substreams (S111 to S115)
-Display stream selection processing (S121 to S123)
-Processing using the main stream (S131 to S138)
It is assumed here that the moving image shooting frame rate is 60 fps and the display frame rate of the display unit 153 is 30 fps.

In S111, S121, and S131, the camera control unit 131 determines whether or not to terminate the shooting standby process. If it is determined to be terminated, the process proceeds to S140. If not, the process proceeds to S112, S122, and S132.
In the present embodiment, the camera control unit 131 can determine to end the shooting standby process when, for example, an instruction to change to the reproduction mode, an ON operation of the second switch SW2, and an OFF operation of the power switch are detected. However, these are mere examples, and it may be determined that the shooting standby process is ended under other conditions.

First, the processing in the state until the first switch SW1 is turned on will be described.
In this state, in the determination process of S122 in the display stream selection process (S121 to S123), the camera control unit 131 advances the process to S123. Then, in step S123, the camera control unit 131 determines to display the display image data generated from the main stream, and notifies the signal processing unit 121 of the display image data.

The signal processing unit 121 acquires the sub-stream and the main stream that are output in parallel from the image sensor 110 (S112, S132) and applies image processing. Then, under the control of the camera control unit 131, the signal processing unit 121 generates display image data (live view image data) from the image data of the main stream after image processing, and stores the display image data in the VRAM area of the memory 132. The signal processing unit 121 further applies analysis processing to the image data after the image processing of the substream, and supplies the analysis result (for example, contrast information for focus detection) to the camera control unit 131.

Here, as a method of reading the image sensor 110 in the still image shooting standby state, it is assumed that the pixel row for main data is set to read at 30 fps and the pixel row for sub data is set to read at 60 fps.

The signal processing unit 121 generates 30 fps display image data from the main stream and sequentially stores the display image data in the VRAM area of the memory 132. The display control unit 151 reads the display image data from the VRAM area of the memory 132 and causes the display unit 153 to display the image data for display through the D/A conversion unit 152. As a result, the display unit 153 functions as an EVF in the still image shooting standby state.

On the other hand, the signal processing unit 121 executes the analysis process for each frame for the substream and outputs the analysis result to the camera control unit 131 at 60 times/second. The camera control unit 131 can grasp the focus state of the lens 101 by monitoring the change in the analysis result (for example, contrast information) while reciprocally driving (wobbling) the focus lens of the lens 101 in a minute range. Then, the focus state of the lens 101 can be made to follow the movement of the object by moving the center position of the reciprocating drive of the focus lens as necessary. Further, the camera control unit 131 detects the focus lens position where the contrast becomes maximum as the focus position from the contrast information obtained during wobbling (S113).

When the image signal pair used in the AF process of the phase difference detection method is obtained in the analysis process, the camera control unit 131 detects the phase difference between the image signals and converts the phase difference into a defocus amount. Since the defocus amount represents the moving direction and the moving amount of the focus lens up to the focus position, the camera control unit 131 drives the focus lens of the lens 101 to the focus position based on the defocus amount. The driving of the focus lens and the diaphragm included in the lens 101 is realized by giving a command from the camera control unit 131 to the lens control unit 141.

FIG. 3 is a diagram showing the use of the main stream and the sub-stream and the related processing over time during the period before and after the first switch SW1 is turned on. It should be noted that in FIG. 3, the description of “for AF” is for convenience, and it is shown that it is the purpose of actually obtaining the analysis result for use in AE and AF. As shown in FIG. 3, the main stream is for display and the sub stream is for AF (analysis) until the SW1 is turned on.

Next, the operation when the release button is pressed halfway to turn on the first switch SW1 and the second switch SW2 will be described.
When the release button of the operation unit 161 is half-pressed and the first switch SW1 is turned on, in the determination process of S122 in the display stream selection process (S121 to S123), the camera control unit 131 advances the process to S124. Then, in step S124, the camera control unit 131 determines to display the display image data generated from the substream, and notifies the signal processing unit 121 of the display image data.

As a result, the signal processing unit 121 changes the operation so as to generate 30 fps display image data that matches the display frame rate of the display unit 153 from the substream read at 60 fps and store the display image data in the VRAM 132. To do. The method of reducing the frame rate is not particularly limited, and data for two frames may be added or frames may be thinned out.

Further, in the processing using the main stream, the camera control unit 131 advances the processing from the determination processing of S133 to S134, and changes the method of reading the main stream from the image sensor 110. Specifically, the reading method for acquiring the image data for determining the flash emission amount is changed. This corresponds to changing the usage of the main stream to control the light emission amount.

Here, the reason why the reading method of the main stream instead of the sub stream is changed is that the driving operation of the focus lens based on the analysis result and the light emission amount determination of the flash using the pre-light emission cannot be executed in parallel. When continuing to use the main stream for display and changing the purpose of the sub stream to control the light emission amount of the flash, it is necessary to change the readout method of the pixel row for sub data after moving the focus lens to the in-focus position. is there. The waiting time until the reading method can be changed becomes an increase factor of the release time lag.

By changing the read method of the main stream, it is possible to change the read operation and drive the focus lens in parallel. Therefore, pre-light emission can be performed immediately after the drive of the focus lens is completed, and the release time lag can be shortened. ..

Note that in order to accurately perform the light emission amount at the time of shooting for recording, it is necessary to acquire the data of the image which is entirely exposed by the pre-light emission. When the timings of accumulation (exposure) and reading are different for each row like the image sensor 110, it is necessary to wait for the pre-emission until all the rows to be read enter the exposure period. In order to shorten the waiting time, the camera control unit 131 reads the data to increase the read frame rate by, for example, reducing the number of pixel rows for main data, performing pixel addition, or reducing the accumulation time. You can change the method.

Then, in step S135, the camera control unit 131 determines whether or not the image data before the pre-emission is acquired, and if it is determined that the image data is acquired, the process proceeds to step S137, and if not, the process proceeds to step S136.
In S136, the camera control unit 131 causes the signal processing unit 121 to store the image data after image processing (image data at the time of non-light emission) obtained from the main stream after changing the reading method, in a region other than the VRAM area of the RAM 132, The process returns to S131. Note that the read method changing process in S134 does not have to be executed from the second time onward.

In step S137, the camera control unit 131 causes the built-in flash 182 or the external flash 183 to pre-light through the light emission control unit 181. Then, the signal processing unit 121 stores the image-processed image data (image data at the time of pre-emission) obtained from the main stream in a region other than the VRAM area of the RAM 132, and the process proceeds to S138.

In step S138, the camera control unit 131 causes the signal processing unit 121 to calculate the difference between the image data at the time of non-emission and the image data at the time of pre-emission. Then, the camera control unit 131 determines the flash emission amount at the time of shooting for recording based on the difference. Further, the camera control unit 131 determines the exposure conditions (shutter speed, aperture, shooting sensitivity) at the time of shooting for recording, based on the image data at the time of pre-flashing and the determined amount of light emission. After that, the camera control unit 131 repeatedly executes S131 and S132.

On the other hand, in the processing for the substream, the signal processing unit 121 generates display image data (live view image data) from the image data after the image processing of the substream and stores it in the VRAM area of the memory 132. The signal processing unit 121 further applies an analysis process to the image data after the image processing of the substream, and supplies the analysis result (for example, contrast information) to the camera control unit 131.

Further, the camera control unit 131 advances the process from the determination process of S114 to S115, and drives the focus lens to the focus position obtained in S113. After that, the camera control unit 131 returns the process to S111.

As shown in FIG. 3, when the first switch SW1 is turned on, the reading method of the main stream is changed, and further, the live view image is changed from the main stream to the sub stream, so that the live view display is not interrupted. You can see that it is maintained. Further, by executing the focusing control of the lens 101 using the substream and the change of the reading method of the main stream in parallel, pre-light emission can be performed immediately after the driving of the focus lens is completed.

Thereafter, for example, when the second switch SW2 is turned on, the camera control unit 131 advances the process to S140 and further to S150, and executes still image recording for recording. At this time, the camera control unit 131 causes the light emission control unit 181 to turn on the flash with the light emission amount determined by the pre-light emission. When the still image shooting standby process is terminated for a reason other than turning on SW2, the process is terminated as it is from S140.

Although the flash forced light emission is set here, whether or not the flash should be turned on may be determined as a result of executing the AE process based on the analysis result in S113, for example.

(Modification)
In addition, here, the configuration using the image sensor 110 capable of outputting two image data in parallel has been described. However, the configuration may be such that two image data are acquired in parallel by another method. For example, as shown in FIG. 5, a half mirror 104 may be used, and a reflected subject optical image and a transmitted subject optical image may be captured by the first image sensor 113 and the second image sensor 114, respectively.

Further, in this embodiment, the case where the reading method is changed to change the purpose of the image data from the display to the flash emission amount control has been described. However, the present invention can be applied when changing other uses. For example, photometry in a wide dynamic range may be realized by switching the main stream between normal photometry and high-luminance photometry while performing focus detection using the substream. In this case, the camera control unit 131 performs the photometric processing using the image data after the image processing obtained from the main stream.

Then, when the normal photometry (for example, photometry based on the image shot under the proper exposure condition) is completed, the camera control unit 131 uses the method of reading the pixel row for the main data to obtain the image data for the high-luminance photometry. Change to read method. The image data for high-brightness photometry may be read by a method in which the charge storage time is shorter than that for image data for normal photometry. The camera control unit 131 uses the display image data for the normal photometry process, and controls the signal processing unit 121 to generate the display image data from the substream during the read method switching process and the high-luminance photometry period. To do.

According to the present embodiment, of the two image data acquired in parallel, one of the image data is used for focus detection and the other image is used for other than focus detection, and the reading method of the image sensor is changed. In this case, the reading method for the other image data is changed. Accordingly, the focus detection operation and the read change processing can be executed in parallel, so that the shutter time lag can be shortened, for example. Furthermore, if the one image data is used for the other image data, the process using the other image data can be continued without interruption.

(Other embodiments)
The present invention supplies a program that implements one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program. It can also be realized by the processing. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

Reference numeral 100... Imaging device, 110... Imaging device, 121... Signal processing unit, 131... Camera control unit, 141... Lens control unit, 151... Display control unit, 181... Emission control unit

Claims (11)

Acquisition means for acquiring the first image data and the second image data from the image sensor;
Signal processing means for generating information for focus detection of the photographing lens based on the second image data, and generating image data for display based on the first image data;
A read-out method of the image pickup device and a control means for controlling the operation of the signal processing means,
When changing the reading method of the image pickup device, the control means changes the reading method for acquiring the first image data and generates image data for display based on the second image data. To control the signal processing means,
An imaging device characterized by the above. The image pickup apparatus according to claim 1, wherein the control unit changes a reading method of the image pickup apparatus when a preparation instruction for still image shooting is detected. The control means changes a reading method for acquiring the first image data in order to use the first image data as image data for determining a flash emission amount. Item 2. The image pickup device according to item 2. The control unit further drives the focus lens of the photographing lens based on the information generated based on the second image data when the preparation instruction is detected. Imaging device. The image pickup apparatus according to claim 4, wherein the control unit further causes the flash to pre-emit when the drive of the focus lens is completed. The control unit changes a reading method for acquiring the first image data in order to use the first image data as image data for high-luminance photometry. Imaging device. The control unit changes the read method for acquiring the first image data to a read method with a shorter charge storage time than before the detection of the preparation instruction. Imaging device. 8. The first image data and the second image data are image data read from different pixel rows of the image sensor, and the first image data and the second image data are image data read out from different pixel rows. Imaging device. 8. The image pickup device according to claim 1, wherein the image pickup device includes a first image pickup device for obtaining the first image data and a second image pickup device for obtaining the second image data. The imaging device according to any one of items. An acquisition step of acquiring first image data and second image data from the image sensor,
A signal processing step of generating information for focus detection of the photographing lens based on the second image data, and generating image data for display based on the first image data;
When changing the read method of the image sensor, the read method for acquiring the first image data is changed, and the signal is generated so as to generate image data for display based on the second image data. A control step for controlling the processing step,
A method for controlling an imaging device, comprising: A program for causing a computer included in an imaging device to function as a control unit included in the imaging device according to claim 1.

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