JP4227030B2 - Camera and camera control method - Google Patents

Description

  The present invention obtains image information indicating a subject image from a position different from each other by a plurality of imaging optical systems, and performs a white balance adjustment of the obtained plurality of image information using a preset adjustment value, and The present invention relates to a camera control method.

  In recent years, interest in stereoscopic images has increased, and a camera that can capture stereoscopic images by acquiring right-eye images and left-eye images using two camera units provided at two different positions has been put into practical use. Has been.

  On the other hand, a camera that acquires a normal two-dimensional image is provided with a white balance control function that adjusts the color of the image as a general function. By performing the above, an image having an appropriate color can be obtained.

  Conventionally, as a technique that can be applied to white balance control in a camera capable of capturing a stereoscopic image, Patent Document 1 discloses that in a camera that acquires a normal (two-dimensional) image, first, when the shutter button is half-pressed, R , G, B based on the R / G / B ratio and EV value, the light source type is determined, and the analog amplifier gain of the previous gain block is controlled according to the white balance adjustment value according to the light source type. A white balance correction is performed after rough white balance correction, and when the shutter button is fully pressed, a recording image is captured, and R / G / B is calculated based on R / G / B in the captured image data. Is disclosed to finely adjust the white balance by controlling the analog amplifier gain of the subsequent gain block .

  In Patent Document 2, in a camera that acquires a normal (two-dimensional) image, the color temperature information of the light that illuminates the subject is measured, and the white balance is adjusted based on the color temperature information. Technology is disclosed.

Further, in Patent Document 3, in a camera that acquires a normal (two-dimensional) image, a plurality of color temperature information is stored in association with a plurality of light sources, and the color temperature information of the light source that irradiates the subject is stored. A technique is disclosed in which a correction value for white balance correction is obtained based on the set color temperature information, and the gain of the gain control circuit is controlled according to the correction value.
JP 2000-299876 A JP-A-6-165189 Japanese Patent Laid-Open No. 9-187412

  However, in the techniques described in Patent Documents 1 to 3, no consideration is given to white balance adjustment for a plurality of pieces of image information acquired by a plurality of camera units. When the technique described in 3 is applied and white balance adjustment of a camera capable of taking a stereoscopic image is performed, there is a problem in that the adjustment result of each image information is shifted.

  That is, in each camera unit constituting the camera, white with the same gain due to the difference in the spectral characteristics of each lens, optical elements such as an OLPF (Optical Low Pass Filter) and IR cut filter, or the spectral characteristics of the CCD itself. There may be a shift in the color of each image after the balance adjustment.

  The color shift may make the stereoscopic image information generated based on these images inappropriate and make stereoscopic viewing of the image indicated by the stereoscopic image information difficult.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a camera and a camera control method capable of performing white balance control with high accuracy.

To achieve the above object, the camera according to claim 1 is any one of a plurality of imaging optical systems for acquiring image information indicating subject images from different positions and a plurality of predetermined light source types. Input means for inputting selection information for selecting, a plurality of light source types, and a plurality of image information acquired by the plurality of imaging optical systems for each light source type used for white balance adjustment. The corresponding adjustment values are stored in advance in association with some imaging optical systems, and the adjustment values for the remaining imaging optical systems are derived based on the adjustment values according to the respective light source types of the some imaging optical systems. A storage unit that stores in advance a coefficient for performing association with the remaining imaging optical system, and adjustment of the partial imaging optical system according to the light source type indicated by the coefficient and selection information input from the input unit Based on value Deriving an adjustment value of the remaining imaging optical system, and setting means for setting an adjustment value of each imaging optical system, and a regulating means for the white balance adjustment by using the set adjustment value by said setting means I have.

  In the camera according to claim 1, image information indicating subject images from different positions is acquired by a plurality of imaging optical systems, and each of the information corresponds to the plurality of imaging optical systems on a one-to-one basis. A plurality of adjustment information used for white balance adjustment of image information acquired by the imaging optical system is stored in advance in the storage unit, and white balance adjustment of the plurality of image information acquired by the plurality of imaging optical systems is performed, An adjustment value corresponding to each preset value is used by the adjustment means, and the adjustment value is set in the adjustment means by the setting means based on the adjustment information.

  That is, in the camera according to the present invention, a plurality of pieces of adjustment information for setting adjustment values used for white balance adjustment are stored for each imaging optical system. Each value can be set. Moreover, since the white balance adjustment of each image information acquired by each imaging optical system is performed using the adjustment value corresponding to each, the result of the white balance adjustment of each image information can be made to correspond with accuracy.

  The storage means includes a RAM (Random Access Memory), an EEPROM (Electrically Erasable and Programmable Read Only Memory), a semiconductor storage element such as a flash EEPROM (Flash EEPROM), a floppy disk, and a CD-R (Compact Disc-Recordable). A portable recording medium such as a CD-RW (Compact Disc-ReWritable) or a magneto-optical disk, a fixed recording medium such as a hard disk, or the like can be used.

In this way, the camera according to claim 1 acquires image information indicating a subject image from a position different from each other by a plurality of imaging optical systems, and white balance adjustment of the acquired plurality of image information is set in advance. When performing the adjustment using the adjustment values, a plurality of pieces of adjustment information which are each one-to-one corresponding to the plurality of image pickup optical systems and used for white balance adjustment of image information acquired by the corresponding image pickup optical system. Since the adjustment values corresponding to the plurality of imaging optical systems are set in advance based on the plurality of adjustment information, white balance control can be performed with high accuracy. In addition, since the adjustment value of each imaging optical system can be set according to a plurality of light source types, white balance control can be performed with high accuracy according to the color temperature that differs depending on the type of light source. Furthermore, since the information capacity of the adjustment information corresponding to the remaining imaging optical system can be reduced, the storage capacity of the storage means can be saved.

Furthermore, in the invention described in claim 1 , as in the invention described in claim 2 , the coefficient is set to two types, a coefficient corresponding to a light source type having a bright line and a coefficient corresponding to a light source type not having a bright line. The setting means is configured to determine the remaining number based on a coefficient corresponding to the presence / absence of a bright line of the light source type indicated by the selection information and an adjustment value corresponding to the light source type indicated by the selection information of the partial imaging optical system. deriving an adjustment value of the imaging optical system, the adjustment value of each imaging optical system may be adapted to set. Thereby, white balance control can be performed with high accuracy in consideration of an extreme difference in color temperature depending on the presence or absence of the bright line of the light source type while saving the storage capacity of the storage means.

In order to achieve the above object, a camera according to claim 3 includes a plurality of imaging optical systems for acquiring image information indicating subject images from different positions, and a plurality of predetermined light source types. Each light source used for performing white balance adjustment of a plurality of image information acquired by the input means for inputting selection information for selecting any one of the plurality of light source types and the plurality of imaging optical systems An adjustment value corresponding to the species is stored in advance in association with a part of the imaging optical systems, and a predetermined light source type and an adjustment value in accordance with the light source type are stored in advance in association with the remaining imaging optical systems. And the light source type indicated by the selection information input by the input unit is a light source type other than the predetermined light source type, according to the predetermined light source type of the part of the imaging optical system Adjustment value and the rest Deriving a ratio of an adjustment value according to the predetermined light source type of the imaging optical system, and using the adjustment value according to the light source type indicated by the ratio and the selection information of the part of the imaging optical system, the remaining A setting unit that derives an adjustment value of the imaging optical system and sets the adjustment value of each imaging optical system, and an adjustment unit that performs the white balance adjustment using the adjustment value set by the setting unit. Yes.

Thereby, when acquiring image information indicating a subject image from a position different from each other by a plurality of imaging optical systems, and performing white balance adjustment of the acquired plurality of image information using preset adjustment values, A plurality of adjustment information that is one-to-one correspondence with the plurality of imaging optical systems and that is used for white balance adjustment of image information acquired by the corresponding imaging optical system is stored in advance, and the plurality of adjustments Since adjustment values corresponding to the plurality of imaging optical systems are set based on the information, white balance control can be performed with high accuracy. In addition, since the adjustment value of each imaging optical system can be set according to a plurality of light source types, white balance control can be performed with high accuracy according to the color temperature that differs depending on the type of light source. Further, when the light source type indicated by the selection information is a predetermined light source type, the adjustment value stored as the adjustment information in the storage means may be set as it is, and the adjustment value setting process can be performed easily and at high speed. On the other hand, in the case of other light source types, a ratio between an adjustment value according to a predetermined light source type of some imaging optical systems and an adjustment value according to a predetermined light source type of the remaining imaging optical systems is derived, Since the adjustment value of the remaining imaging optical system is derived using the ratio and the adjustment value corresponding to the light source type indicated by the selection information of some imaging optical systems, the adjustment information corresponding to the remaining imaging optical systems is derived. The information capacity can be reduced, and the storage capacity of the storage means can be saved.

On the other hand, in order to achieve the above object, a camera control method according to claim 4 includes a plurality of imaging optical systems for acquiring image information indicating subject images from different positions, and a plurality of predetermined optical systems. An input means for inputting selection information for selecting any one of the light source types, wherein the plurality of light source types and the plurality of image pickup optical systems are used. An adjustment value corresponding to each light source type used for white balance adjustment of image information is stored in advance in association with a part of the imaging optical system, and is stored in each light source type of the part of the imaging optical system. Coefficients for deriving the adjustment values of the remaining imaging optical systems based on the corresponding adjustment values are stored in advance in association with the remaining imaging optical systems, and the coefficients and the selection information input from the input unit are stored. Light source indicated The adjustment values of the remaining image pickup optical systems are derived based on the adjustment values of the part of the image pickup optical systems according to the white balance, the adjustment values of the respective image pickup optical systems are set, and the white values are set using the set adjustment values. Balance adjustment is performed.

Therefore, according to the camera control method of the fourth aspect , since it operates in the same manner as the first aspect of the invention, the same effect as the first aspect of the invention can be obtained.
Further, according to a fourth aspect of the present invention, as in the fifth aspect of the present invention, the coefficient is set to two types, a coefficient corresponding to a light source type having a bright line and a coefficient corresponding to a light source type not having a bright line. Adjustment of the remaining imaging optical systems based on a coefficient according to the presence or absence of a bright line of the light source type indicated by the selection information and an adjustment value according to the light source type indicated by the selection information of the partial imaging optical system A value may be derived and an adjustment value for each imaging optical system may be set.
Therefore, according to the camera control method of the fifth aspect, the same effect as that of the invention according to the second aspect can be obtained because it operates in the same manner as the second aspect of the invention.
On the other hand, in order to achieve the above object, a camera control method according to claim 6 includes a plurality of imaging optical systems for acquiring image information indicating subject images from different positions, and a plurality of predetermined optical systems. An input means for inputting selection information for selecting any one of the light source types, wherein the plurality of light source types and the plurality of image pickup optical systems are used. An adjustment value according to each light source type used for white balance adjustment of image information is stored in advance in association with a part of the imaging optical system, and a predetermined light source type and adjustment according to the light source type are stored. If the light source type indicated by the selection information input by the input means is a light source type other than the predetermined light source type, the value is stored in advance in association with the remaining imaging optical system. Of the imaging optical system A ratio between an adjustment value according to a predetermined light source type and an adjustment value according to the predetermined light source type of the remaining imaging optical system is derived, and the ratio and the selection information of the partial imaging optical system are derived. The adjustment values of the remaining imaging optical systems are derived using the adjustment values corresponding to the light source types shown, the adjustment values of the respective imaging optical systems are set, and the white balance adjustment is performed using the set adjustment values. Is.
Therefore, according to the camera control method of the sixth aspect, since it operates in the same manner as the invention of the third aspect, the same effect as the invention according to the third aspect can be obtained.

  As described above, the camera and the camera control method according to the present invention acquire image information indicating a subject image from a position different from each other by a plurality of imaging optical systems, and adjust the white balance of the acquired plurality of image information. Are used for white balance adjustment of image information that is one-to-one correspondence with each of the plurality of imaging optical systems and that is acquired by the corresponding imaging optical system. Since a plurality of adjustment information is stored in advance and adjustment values corresponding to the plurality of imaging optical systems are set based on the plurality of adjustment information, white balance control can be performed with high accuracy. It has an excellent effect.

The best mode for carrying out the invention will be described below in detail with reference to the drawings. Here, a case where the present invention is applied to a digital electronic still camera (hereinafter simply referred to as “digital camera”) having a function of capturing a stereoscopic still image and a normal (two-dimensional) still image will be described.
(First embodiment)
First, an external configuration of the digital camera 10 according to the present embodiment will be described with reference to FIG. As shown in the figure, on the front of the digital camera 10, there are a pair of lenses 12A and 12B for forming a subject image, and a viewfinder 70 used for determining the composition of the subject to be photographed. Is provided.

  On the top surface of the digital camera 10, a release button (so-called shutter) 52A that is pressed by a photographer when performing shooting and a power switch 52E are provided.

  Note that the release button 52A according to the present embodiment is in a state where it is pressed down to an intermediate position (hereinafter referred to as “half-pressed state”) and a state where it is pressed down to a final pressed position that exceeds the intermediate position (hereinafter referred to as “below”). It is configured to be able to detect a two-stage pressing operation of “fully pressed state”.

  In the digital camera 10 according to the present embodiment, when a shooting mode to be described later is set, the release button 52A is pressed halfway to activate an AE (Automatic Exposure) function to expose the exposure state ( After the shutter speed and aperture state are set, the AF (Auto Focus) function is activated and the focus is controlled. After that, when the shutter button is fully pressed, exposure (photographing) is performed.

  On the other hand, on the back of the digital camera 10, a liquid crystal display (hereinafter referred to as “the eyepiece” of the finder 70 and a subject image, various menu screens, messages, etc. indicated by the digital image data obtained by photographing). “LCD”) 30, a stereoscopic shooting mode that is a mode for shooting a three-dimensional still image, a normal shooting mode that is a mode for shooting a two-dimensional still image, and digital image data obtained by shooting. The subject image to be displayed (reproduced) on the LCD 30, a mode changeover switch 52 </ b> B that is operated to set any one of the playback modes, a cross-cursor button 52 </ b> C, and zooming of the subject image during shooting. Zoom switch 52D that is operated when performing (reduction).

  The cross-cursor button 52C has a total of five arrow keys indicating four movement directions of up, down, left, and right in the display area of the LCD 30, and a determination key positioned at the center of the four arrow keys. Consists of two keys. The zoom switch 52D corresponds to the position of “T” in the figure and is operated when enlarging the subject image, corresponds to the position of “W” in the figure, and corresponds to the subject image. And a wide switch that is operated when the image is reduced.

  On the other hand, on the side of the digital camera 10, a slot in which a recording medium capable of recording digital image data obtained by photographing (here, a recording medium on which the digital image data is recorded as an image file) can be mounted. SL is provided.

  Next, the configuration of the electrical system of the digital camera 10 according to the present embodiment will be described with reference to FIG.

  As shown in the figure, the digital camera 10 includes an optical unit 13A configured to include the lens 12A described above, a CCD (charge coupled device) 14A disposed behind the optical axis of the lens 12A, and a correlated double. A first circuit configured to include a sampling circuit (hereinafter referred to as “CDS”) 16A and an analog / digital converter (hereinafter referred to as “ADC”) 18A that converts an input analog signal into digital data. An imaging system 88A is provided. The digital camera 10 includes a second optical unit 13B configured to include the lens 12B described above, a CCD 14B disposed behind the optical axis of the lens 12B, a CDS 16B, and an ADC 18B. An imaging system 88B is provided.

  That is, the digital camera 10 according to the present embodiment includes two imaging systems, the first imaging system 88A and the second imaging system 88B, which have the same configuration as each other, and can be used for stereoscopic shooting by using them. It is said. Note that the normal shooting mode is set, and when performing normal two-dimensional shooting, one of the first imaging system 88A and the second imaging system 88B is selectively used.

  In the first imaging system 88A, the output end of the CCD 14A is connected to the input end of the CDS 16A, and the output end of the CDS 16A is connected to the input end of the ADC 18A. Similarly, in the second imaging system 88B, the output end of the CCD 14B is connected to the input end of the CDS 16B, and the output end of the CDS 16B is connected to the input end of the ADC 18B.

  Here, the correlated double sampling processing by the CDS 16A and the CDS 16B is included in the output signal for each pixel of the solid-state image sensor for the purpose of reducing noise (particularly thermal noise) included in the output signal of the solid-state image sensor. This process is to obtain accurate pixel data by taking the difference between the feedthrough component level and the pixel signal component level.

  On the other hand, the digital camera 10 has input terminals connected to the output terminals of the ADC 18A and ADC 18C and has a built-in line buffer of a predetermined capacity, and the input digital image data is stored in a predetermined area of the second memory 40 described later. Digital image data acquired by one of the first imaging system 88A and the second imaging system 88B applied when the image input controller 20 that performs direct storage control and the normal imaging mode is set. The image signal processing circuit 22 that performs various image processing on the two digital image data acquired by both the first imaging system 88A and the second imaging system 88B when the stereoscopic imaging mode is set. Stereoscopic image signal processing circuit 23 that performs various image processing and synthesis, and compression processing for digital image data in a predetermined compression format Subjecting one, and a compression and decompression circuit 24 for performing expansion processing in the format specified by the compression format for compressed digital image data.

  The image signal processing circuit 22 and the stereoscopic image signal processing circuit 23 each have three multipliers (not shown in FIG. 2) for multiplying each of the input R, G, and B image data by gain. (Refer to FIG. 3) and white balance adjustment processing described later can be performed.

  In addition, the digital camera 10 generates a signal for displaying an image, a menu screen, or the like indicated by the digital image data on the LCD 30 and supplies the signal to the LCD 30, while a video signal indicating the image to be displayed on the LCD 30 (the present embodiment). The video / LCD encoder 28 generates an NTSC signal and outputs it to the video output terminal OUT.

  The digital camera 10 includes a ROM 33 in which various types of information are stored, and a CPU (Central Processing Unit) 32 that controls the operation of the entire digital camera 10 and physical quantities required to operate the AF function. In the present embodiment, an AF detection circuit 34 that detects (contrast value of an image obtained by imaging by at least one of the CCD 14A and the CCD 14B) is included.

  Further, the digital camera 10 is obtained by imaging with at least one of the CCD 14A and the CCD 14B used for photographing in the present embodiment (physical quantities required for operating the AE function and the AWB (Automatic White Balance) function). An AE / AWB detection circuit 36 that detects an amount indicating the brightness of the image (hereinafter referred to as “photometric data”), and an SDRAM (Synchronous Dynamic Random Access) used as a work area when the CPU 32 executes various processes. The first memory 38 is configured by a memory, and the second memory 40 is configured by a VRAM (Video RAM) that mainly stores digital image data obtained by photographing.

  Also, the digital camera 10 performs processing for outputting audio information to the outside by the media controller 42 for making the recording medium 43 mounted in the slot SL accessible by the digital camera 10, the speaker 72, and the speaker 72. An analog signal indicating audio information input via an audio output processing unit 46 to be performed, a microphone (stereo microphone) provided in two systems, and an amplifier 84 is converted into digital audio data that can be handled by the digital camera 10. And a voice input processing unit 82 that performs processing.

  The image input controller 20, image signal processing circuit 22, stereoscopic image signal processing circuit 23, compression / decompression processing circuit 24, video / LCD encoder 28, CPU 32, AF detection circuit 34, AE / AWB detection circuit 36, first memory 38, the second memory 40, the media controller 42, the audio output processing unit 46, and the audio input processing unit 82 are connected to each other via the system bus BUS.

  Accordingly, the CPU 32 sets the gain for the image signal processing circuit 22 and the stereoscopic image signal processing circuit 23, and the image input controller 20, the image signal processing circuit 22, the stereoscopic image signal processing circuit 23, the compression / expansion processing circuit 24, and the video. / Control of each operation of the LCD encoder 28, acquisition of physical quantities detected by the AF detection circuit 34 and the AE / AWB detection circuit 36, access to the first memory 38, the second memory 40, and the recording medium 43 The audio information output from the speaker 72 via the audio output processing unit 46 and the audio information input via the microphone, the amplifier 84 and the audio input processing unit 82 can be performed.

  On the other hand, the first imaging system 88A is provided with a timing generator 48A that mainly generates a timing signal for driving the CCD 14A and supplies the timing signal to the CCD 14A. The input end of the timing generator 48A is connected to the CPU 32, and the output end is Each is connected to the CCD 14A, and the drive of the CCD 14A is controlled by the CPU 32 via the timing generator 48A.

  Further, the CPU 32 is connected to an input end of a motor drive unit 50A provided in the first imaging system 88A, and an output end of the motor drive unit 50A is connected to a focus adjustment motor, a zoom motor, and an aperture drive motor provided in the optical unit 13A. It is connected.

  That is, the lens 12A included in the optical unit 13A according to the present embodiment has a plurality of lenses and is configured as a zoom lens that can change (magnify) the focal length. I have. The lens drive mechanism includes the focus adjustment motor, the zoom motor, and the aperture drive motor. The focus adjustment motor, the zoom motor, and the aperture drive motor are each supplied with a drive signal supplied from the motor drive unit 50A under the control of the CPU 32. Driven by.

  When changing the optical zoom magnification, the CPU 32 drives and controls the zoom motor to change the focal length of the lens 12A included in the optical unit 13A.

  Further, the CPU 32 performs focusing control by driving and controlling the focus adjustment motor so that the contrast of an image obtained by imaging by the CCD 14A is maximized. In other words, the digital camera 10 according to the present embodiment employs a so-called TTL (Through The Lens) method in which the lens position is set so that the contrast of the read image is maximized as the focus control. .

  Note that the second imaging system 88B is also provided with a timing generator 48B and a motor drive unit 50B having the same configuration as that of the first imaging system 88A. The CPU 32 controls driving of the CCD 14B and driving of a focus adjustment motor, a zoom motor, and an aperture driving motor included in a lens driving mechanism (not shown) provided in the optical unit 13B. In the present embodiment, the range in which the focal positions of the optical unit 13A and the optical unit 13B can be changed is shared.

  Further, the release button 52A, the mode switch 52B, the cross cursor button 52C, the zoom switch 52D, and the various buttons and switches (generally referred to as “operation unit 52” in FIG. 2) of the power switch 52E are stored in the CPU 32. Connected, the CPU 32 can always grasp the operation state of these buttons and switches.

  In addition, the digital camera 10 according to the present embodiment includes a power supply circuit 54 and a battery 56, and the power supply circuit 54 is appropriate based on the power input from the battery 56 under the control of the CPU 32. Electric power for operation is generated and supplied to each part. In addition, in order to avoid complication, in the same figure, illustration of the connection line to each part to which electric power is supplied from the power supply circuit 54 is abbreviate | omitted.

  Furthermore, the digital camera 10 according to the present embodiment is provided with a clock generator 80. The clock generator 80 generates an appropriate clock signal under the control of the CPU 32 and supplies it to each unit. In order to avoid complications, connection lines to the respective parts to which the clock signal is supplied from the clock generator 80 are omitted in FIG.

  Next, various image processing for the digital image data in the stereoscopic image signal processing circuit 23 will be described with reference to FIG.

  In the stereoscopic image signal processing circuit 23, the digital image data acquired by the first imaging system 88A and the second imaging system 88B via the image input controller 20 are alternately input in a time division manner, and the input digital image data is converted into the input digital image data. On the other hand, processing including offset processing 90, white balance adjustment processing 92, gamma processing 94, YC signal processing 96, and stereoscopic image processing 98 is sequentially performed.

  First, the input digital image data is subjected to an offset process 90 so that the physical quantity indicating the black data in the digital image data becomes a predetermined reference physical quantity, and then each R, G, B image data Is input to each multiplier described above.

  On the other hand, gains WB_R, WB_G, and WB_B for controlling white balance are set in the multiplier by the CPU 32, and each of the multipliers multiplies the input image data by the set gain. Gamma processing 94 is applied to the R ′, G ′, and B ′ image data whose white balance has been adjusted by this multiplication, and the R ′, G ′, and B ′ image data have predetermined gamma characteristics. The input / output characteristics are changed as described above, and the YC signal processing 96 is further performed to generate a luminance signal Y and chroma signals Cr and Cb (hereinafter referred to as “YC signal”).

  The YC signal obtained by the first imaging system 88A and the second imaging system 88B in this way is subjected to the stereoscopic image processing 98 and is synthesized to generate a YC signal indicating a stereoscopic image, which is sent to the compression / expansion processing circuit 24. Is output.

  Here, the CPU 32 sets the gain for the multiplier used in the white balance adjustment process 92 based on the physical quantity detected by the AE / AWB detection circuit 36 or the adjustment information stored in the ROM 33.

  FIG. 4 schematically shows adjustment information according to the present embodiment stored in the ROM 33 as an example. As shown in the figure, the adjustment information includes a table corresponding to the first imaging system 88A and a table corresponding to the second imaging system 88B. The table corresponding to each imaging system is predetermined. A plurality of light source types (in the example shown in the figure, clear, cloudy, shade, light bulb, fluorescent light (white), fluorescent light (day white) and fluorescent light (daylight color)) and digital gain corresponding to each light source type And are stored in association with each other.

  As the digital gain corresponding to each light source type, appropriate color can be reproduced based on the spectral characteristics of the CCD 14A or CCD 14B, the color temperature information of each light source, the wavelength distribution of light emitted from each light source, and the like. The correct value is applied. Further, as shown in the figure, in the present embodiment, the digital gain (WBa_G, WBb_G) of the G image data serving as the sensitivity reference is fixed to “1.0”, and the R image data corresponding thereto is fixed. Digital gains (WBa_R, WBb_R) and digital gains (WBa_B, WBb_B) of B image data are stored.

  Next, the operation of the digital camera 10 according to the present embodiment will be described. First, the overall operation of the digital camera 10 when the stereoscopic shooting mode is set will be described.

  First, in the first imaging system 88A, the subject image is picked up by the CCD 14A via the optical unit 13A, and a signal indicating the subject image is sequentially output from the CCD 14A to the CDS 16A.

  The CDS 16A performs correlated double sampling processing on the signal input from the CCD 14A and sequentially outputs analog image signals of R (red), G (green), and B (blue) obtained thereby to the ADC 18A.

  The ADC 18A converts the R, G, and B analog image signals input from the CDS 16A into 12-bit R, G, and B signals (digital image data) and outputs the converted signals to the image input controller 20.

  In parallel with the operation of the first image pickup system 88A, the second image pickup system 88B also picks up the subject image by the CCD 14B via the optical unit 13B, and sequentially outputs a signal indicating the subject image from the CCD 14B to the CDS 16B. The CDS 16B performs correlated double sampling processing on the signal input from the CCD 14B and sequentially outputs the R, G, B analog image signals to the ADC 18B. The ADC 18B is input from the CDS 16B. The R, G, B analog image signals are converted into 12-bit R, G, B signals (digital image data), respectively, and output to the image input controller 20.

  The image input controller 20 accumulates digital image data for two images sequentially input from the ADC 18 </ b> A and ADC 18 </ b> B in a built-in line buffer and temporarily stores them in a predetermined area of the second memory 40.

  Digital image data for two images stored in a predetermined area of the second memory 40 is read out by the stereoscopic image signal processing circuit 23 under the control of the CPU 32, and is subjected to the above-described various image processing (see FIG. 3). The obtained YC signal is stored in an area different from the predetermined area of the second memory 40.

  The LCD 30 is configured to display a moving image (through image) obtained by continuous imaging by each imaging system and can be used as a finder. In this way, the LCD 30 is used as a finder. In this case, the YC signal indicating the stereoscopic image stored in the predetermined area of the second memory is sequentially output to the LCD 30 via the video / LCD encoder 28. As a result, a through image is displayed on the LCD 30.

  Here, at the timing when the release button 52A is half-pressed by the user, after the AE function is activated and the exposure state is set in each imaging system as described above, the AF function is activated and focus control is performed. The YC signal stored in the second memory 40 at that time is then fully pressed, and is compressed in a predetermined compression format (in this embodiment, JPEG format) by the compression / decompression processing circuit 24. After that, recording is performed on the recording medium 43 via the media controller 42.

  Note that the operation of the digital camera 10 when the normal shooting mode is set is such that only the digital image data obtained by the imaging system previously selected by the image signal processing circuit 22 instead of the stereoscopic image signal processing circuit 23 is used. Is substantially the same as the above-described operation in the case where the stereoscopic shooting mode is set, except that a YC signal is generated by performing various image signal processing on the image and the YC signal is stored in the second memory 40. Therefore, explanation here is omitted.

  By the way, in the digital camera 10, an auto white balance function that performs white balance adjustment based on the physical quantity detected by the AE / AWB detection circuit 36 and a preset white that performs white balance adjustment based on adjustment information stored in the ROM 33. Any one of the balance function is selectively executed according to the operation of the operation unit 52 by the user.

  When the preset white balance function is selected by the user and the light source type selection status in the preset white balance function is changed, the digital camera 10 performs the white balance adjustment process 92 on the stereoscopic image signal processing circuit 23. WB gain setting processing for setting the gain is executed.

  FIG. 5 is a flowchart showing the flow of processing of the WB gain setting processing program executed by the CPU 32 at this time. Hereinafter, the WB gain setting processing according to the present embodiment will be described with reference to FIG.

  Here, it is assumed that when the preset white balance function is selected, one of a plurality of predetermined light source types is selected.

  First, in step 100, the digital gain corresponding to the selected light source type is read from the table corresponding to each imaging optical system in the ROM 33, respectively.

  For example, when the selected light source type is “shade”, WBa_G = 1.0, WBa_R = 4.0, and WBa_B = 1.0 are read from the table corresponding to the first imaging system 88A, and the second WBb_G = 1.0, WBb_R = 4.8, and WBb_B = 0.8 are read from the table corresponding to the imaging system 88B.

  In the next step 102, after the read digital gain is set in the stereoscopic image signal processing circuit 23, the present WB gain setting processing program is terminated.

  Thereafter, the stereoscopic image signal processing circuit 23 performs the white balance adjustment process 92 using the digital gain corresponding to the imaging system from which the digital image data to be processed is acquired, among the digital gains set by the CPU 32.

  As described above in detail, according to the first embodiment, digital image data indicating a subject image is acquired from different positions by the first imaging system 88A and the second imaging system 88B, and acquired. When white balance adjustment processing of a plurality of digital image data is performed using a preset gain, the information is one-to-one corresponding to the first imaging system 88A and the second imaging system 88B, and the corresponding imaging is performed. A plurality of adjustment information used for white balance adjustment of digital image data acquired by the system is stored in the ROM 33 in advance, and a gain corresponding to each imaging system is set based on the adjustment information corresponding to each imaging system. Therefore, white balance control can be performed with high accuracy.

  Further, according to the first embodiment, adjustment information corresponding to a plurality of light source types is stored, and the CPU 32 is based on the adjustment information corresponding to the light source type selected by the operation of the operation unit 52. Since the gain is set, the gain of each imaging system can be set according to a plurality of light source types, and white balance adjustment corresponding to different color temperatures can be performed depending on the type of light source.

Furthermore, according to the first embodiment, since the adjustment information is obtained by associating a plurality of light source types with digital gains corresponding to the respective light source types, the digital gain associated with the selected light source type. Therefore, the gain setting process can be performed easily and at high speed.
(Second Embodiment)
In the first embodiment, the adjustment information for setting the gain for the stereoscopic image signal processing circuit 23 corresponds to each of the first imaging system 88A and the second imaging system 88B and includes a plurality of predetermined information. In the second embodiment, the two tables that associate the light source types and the digital gains corresponding to the respective light source types are stored in the ROM 33. However, in the second embodiment, adjustment information corresponding to the first imaging system 88A is described. A table in which a plurality of predetermined light source types and digital gains corresponding to the respective light source types are associated with each other, and the adjustment information corresponding to the second imaging system 88B is stored as digital information of the second imaging system 88B. A mode for storing a coefficient for deriving the gain based on the digital gain of the first imaging system 88A will be described.

  The configuration of the digital camera according to the second embodiment is the same as the configuration of the digital camera 10 according to the first embodiment described above (see FIGS. 1 to 3), and will be described here. Is omitted.

  In FIG. 6, the adjustment information according to the present embodiment stored in the ROM 33 is schematically shown as an example. As shown in the figure, a table in which a plurality of predetermined light source types and digital gains corresponding to the respective light source types are associated is stored as adjustment information corresponding to the first imaging system 88A. As adjustment information corresponding to the imaging system 88B, a coefficient for deriving the digital gain of the second imaging system 88B based on the digital gain of the first imaging system 88A is stored.

  As shown in the figure, the table corresponding to the first imaging system 88A includes predetermined light source types (sunny, cloudy, shade, light bulb, fluorescent light (white), fluorescent light (day white), fluorescent light. (Daylight color)) and a digital gain corresponding to each light source type are stored in association with each other.

  The digital gain corresponding to each light source type is a value that can reproduce an appropriate color tone based on the spectral characteristics of the CCD 14A, the color temperature information of each light source, the wavelength distribution of light emitted from each light source, and the like. Has been applied. Also, as shown in the figure, in the present embodiment, the digital gain (WBa_G) of the G image data, which is a reference for sensitivity, is fixed at “1.0”, and the digital gain (R The digital gain (WBa_B) of the image data of WBa_R) and B is stored.

  In addition, the coefficient for deriving the digital gain of the second imaging system 88B based on the digital gain of the first imaging system 88A is 1.0 for WBb_G as a sensitivity reference, and the coefficients α and β are manufactured. Difference in R and B values of each imaging system and spectral characteristics of each imaging system obtained when adjusting the balance of R, G, and B with a G value of 1.0 with respect to a reference light source in a line or the like It is possible to apply coefficients derived on the basis of data based on the above and data obtained by experiments or simulations using actual machines.

  Next, a WB gain setting process according to the second embodiment will be described with reference to FIG. FIG. 7 is a flowchart showing the flow of processing of the WB gain setting processing program executed by the CPU 32 when the user selects the preset white balance function and when the light source type selection status in the preset white balance function is changed. It is.

  Here, it is assumed that when the preset white balance function is selected, one of a plurality of predetermined light source types is selected.

  First, in step 110, the digital gain corresponding to the coefficient and the selected light source type is read, and in the next step 112, the digital gain of the second imaging system 88B is derived.

  For example, when the selected light source type is “shade”, WBa_G = 1.0, WBa_R = 4.0, and WBa_B = 1.0 are read from the table corresponding to the first imaging system 88A, and the second The adjustment information (coefficient 1.0, α and β) of the imaging system 88B is read, and the digital gain WBa_G = 1.0 of the first imaging system 88A corresponding to the selected light source type with the coefficients 1.0, α and β. By multiplying WBa_R = 4.0 and WBa_B = 1.0, respectively, the digital gain WBb_G = 1.0, WBb_R = α × 4.0, and WBb_B = β × 1.0 of the second imaging system 88B are derived.

  In the next step 114, after setting the digital gain of each imaging system in the stereoscopic image signal processing circuit 23, the present WB gain setting processing program is terminated.

  Thereafter, the stereoscopic image signal processing circuit 23 performs the white balance adjustment process 92 using the digital gain corresponding to the imaging system from which the digital image data to be processed is acquired, among the digital gains set by the CPU 32.

  As described above in detail, according to the second embodiment, digital image data indicating a subject image is acquired from different positions by the first imaging system 88A and the second imaging system 88B, and acquired. When white balance adjustment processing of a plurality of digital image data is performed using a preset gain, the information is one-to-one corresponding to the first imaging system 88A and the second imaging system 88B, and the corresponding imaging is performed. A plurality of adjustment information used for white balance adjustment of digital image data acquired by the system is stored in the ROM 33 in advance, and a gain corresponding to each imaging system is set based on the adjustment information corresponding to each imaging system. Therefore, white balance control can be performed with high accuracy.

  Further, according to the second embodiment, adjustment information corresponding to a plurality of light source types is stored, and the CPU 32 is based on the adjustment information corresponding to the light source type selected by the operation of the operation unit 52. Since the gain is set, the gain of each imaging system can be set according to a plurality of light source types, and white balance adjustment corresponding to different color temperatures can be performed depending on the type of light source.

  Further, according to the second embodiment, adjustment information corresponding to the first imaging system 88A is associated with a plurality of light source types and digital gains corresponding to the respective light source types, and the second imaging system 88B The corresponding adjustment information is used as a coefficient for deriving the digital gain of the second imaging system 88B based on the digital gain corresponding to each light source type of the first imaging system 88A, and the coefficient and the first imaging system 88A are selected. Since the digital gain of the second imaging system 88B is derived based on the digital gain corresponding to the type of light source and the gain of each imaging system is set in the stereoscopic image signal processing circuit 23, the second imaging system 88B Since the information capacity of the corresponding adjustment information can be reduced, the storage capacity of the ROM 33 can be saved.

  In the second embodiment, a mode has been described in which one type of coefficient is stored for each image data (R, G, B) of the second imaging system 88B. The present invention is not limited, and a plurality of coefficients may be stored.

For example, as shown in FIG. 8, the coefficients are set to two types of coefficients α1 and β1 according to the light source type having no bright line and coefficients α2 and β2 according to the light source type having the bright line, and the selected light source type is selected. The digital gain of the second imaging system 88B is derived based on the coefficient corresponding to the presence or absence of the bright line and the digital gain corresponding to the selected light source type of the first imaging system 88A, and the digital gain of each imaging system is subjected to stereoscopic image signal processing. The circuit 23 may be set. Thus, white balance control can be performed with high accuracy in consideration of an extreme difference in color temperature depending on the presence or absence of the bright line of the light source type while saving the storage capacity of the ROM 33.
(Third embodiment)
In the first embodiment, the adjustment information for setting the gain for the stereoscopic image signal processing circuit 23 corresponds to each of the first imaging system 88A and the second imaging system 88B and includes a plurality of predetermined information. In the third embodiment, the two tables that associate the light source types and the digital gains corresponding to the respective light source types are stored in the ROM 33. However, in the third embodiment, adjustment information corresponding to the first imaging system 88A is described. A table in which a plurality of predetermined light source types and digital gains corresponding to the respective light source types are associated with each other, and digital information corresponding to a predetermined light source type is used as adjustment information corresponding to the second imaging system 88B. A mode in which the gain is stored in association with the light source type will be described.

  The configuration of the digital camera according to the third embodiment is the same as the configuration of the digital camera 10 according to the first embodiment described above (see FIGS. 1 to 3), and will be described here. Is omitted.

  FIG. 9 schematically shows the adjustment information according to the present embodiment stored in the ROM 33 as an example. As shown in the figure, in the table corresponding to the first imaging system 88A, predetermined light source types (sunny, cloudy, shade, light bulb, fluorescent lamp (white), fluorescent lamp (day white), fluorescent lamp ( The daylight color)) and the digital gain corresponding to each light source type are associated with each other.

  In the second imaging system 88B, only the digital gain corresponding to a predetermined light source type (clear) is associated with the light source type.

  The digital gain corresponding to each light source type is a value that can reproduce an appropriate color tone based on the spectral characteristics of the CCD 14A, the color temperature information of each light source, the wavelength distribution of light emitted from each light source, and the like. Has been applied. Also, as shown in the figure, in the present embodiment, the digital gain (WBa_G) of the G image data, which is a reference for sensitivity, is fixed at “1.0”, and the digital gain (R The digital gain (WBa_B) of the image data of WBa_R) and B is stored.

  Next, the WB gain setting process according to the second embodiment will be described with reference to FIG. FIG. 10 shows a flow of processing of the WB gain setting processing program executed by the CPU 32 when the user selects the preset white balance function and when the light source type selection status in the preset white balance function is changed. It is a flowchart.

  Here, it is assumed that when the preset white balance function is selected, one of a plurality of predetermined light source types is selected.

  First, in step 120, the digital gain corresponding to the predetermined light source type of the first imaging system 88A and the second imaging system 88B is read, and in the next step 122, whether or not the selected light source type is the predetermined light source type. Determine whether. If the determination is affirmative, the process proceeds to step 124 where the read digital gain is set in the stereoscopic image signal processing circuit 23, and then the WB gain setting processing program is terminated.

  On the other hand, if a negative determination is made in step 122, it is determined that it is necessary to derive the digital gain of the second imaging system, the process proceeds to step 126, and the digital gain corresponding to the predetermined light source type is used. A ratio (WBb / WBa) between the digital gain of the first imaging system 88A and the digital gain of the second imaging system 88B is derived.

That is, WBa_G = 1.0, WBa_R = 2.0, and WBa_B = 3.0 are read from the table corresponding to the first imaging system 88A, respectively, and the adjustment information WBb_G = 1.0, WBb_R corresponding to the second imaging system 88B. = 2.4 and WBb_B = 2.4, and the ratio for each of G, R, and B
(WBb_G / WBa_G) = 1.0
(WBb_R / WBa_R) = 1.2
(WBb_B / WBa_B) = 0.8
Is derived.

  In the next step 128, the digital gain corresponding to the selected light source type of the first imaging system 88A is read, and then the process proceeds to step 130, where the ratio derived in step 126 and the first imaging read in step 128 are read. The digital gain of the second imaging system 88B is derived based on the digital gain corresponding to the selected light source type of the system 88A.

For example, if the selected light source type is cloudy, WBa_G = 1.0, WBa_R = 3.0, and WBa_B = 2.0 are read as digital gains of the first imaging system 88A, and these digital gains are read. Multiplying the derived coefficient, as the digital gain of the second imaging system 88B,
WBb_G = 1.0 × 1.0 = 1.0
WBb_R = 3.0 × 1.2 = 3.6
WBb_B = 2.0 × 0.8 = 1.6
Is derived.

  In the next step 132, the digital gain of each imaging system is set in the stereoscopic image signal processing circuit 23, and then this WB gain setting processing program is terminated.

  Thereafter, the stereoscopic image signal processing circuit 23 performs the white balance adjustment process 92 using the digital gain corresponding to the imaging system from which the digital image data to be processed is acquired, among the digital gains set by the CPU 32.

  As described above in detail, according to the third embodiment, digital image data indicating a subject image is acquired from different positions by the first imaging system 88A and the second imaging system 88B, and acquired. When white balance adjustment processing of a plurality of digital image data is performed using a preset gain, the information is one-to-one corresponding to the first imaging system 88A and the second imaging system 88B, and the corresponding imaging is performed. A plurality of adjustment information used for white balance adjustment of digital image data acquired by the system is stored in the ROM 33 in advance, and a gain corresponding to each imaging system is set based on the adjustment information corresponding to each imaging system. Therefore, white balance control can be performed with high accuracy.

  Further, according to the third embodiment, adjustment information corresponding to a plurality of light source types is stored, and the CPU 32 is based on the adjustment information corresponding to the light source type selected by the operation of the operation unit 52. Since the gain is set, the gain of each imaging system can be set according to a plurality of light source types, and white balance adjustment corresponding to different color temperatures can be performed depending on the type of light source.

  Further, according to the third embodiment, the adjustment information corresponding to the first imaging system 88A is associated with a plurality of light source types and digital gains corresponding to the respective light source types, and the second imaging system 88B When the corresponding adjustment information is associated with a predetermined light source type and a digital gain corresponding to the light source type, and the selected light source type is a light source type other than the predetermined light source type, the first imaging system A ratio between the digital gain according to the predetermined light source type of 88A and the digital gain according to the predetermined light source type of the second imaging system 88B is derived, and according to the ratio and the selected light source type of the first imaging system 88A. The digital gain of the second imaging system 88B is derived using the digital gain obtained, and the digital gain of each imaging optical system corresponding to the selected light source type is set in the stereoscopic image signal processing circuit 23. Information If the light source type shown is a predetermined light source type, the digital gain may be set as it is, and the WB gain setting process can be performed easily and at high speed, while if it is another light source type, the first imaging system Since the digital gain of the second imaging system is derived using the digital gain corresponding to the predetermined light source type of the 88A and the second imaging system 88B and the digital gain corresponding to the selected light source type of the first imaging system 88B. The information capacity of the adjustment information corresponding to the second imaging system 88B can be reduced, and the storage capacity of the ROM 33 can be saved.

  As the predetermined light source type, an appropriate adjustment value can be derived by applying a light source type (such as “sunny” in FIG. 9) that serves as a reference for all light source types.

  Further, it is possible to apply a light source that is predicted to be used most frequently, and thereby, it is possible to perform white balance adjustment with the highest accuracy under a light source that is used most frequently. Furthermore, it is also possible to apply a reference light source used when adjusting the balance of R, G, and B by setting the value of G to 1.0 in a production line or the like.

  In each of the above embodiments, the description has been given of the mode in which the values of WBa_G and WBb_G are fixed at “1.0”. However, the present invention is not limited to this, and the reference value is appropriately changed. It goes without saying that it is possible.

  When the values of WBa_G and WBb_G are fixed, fixed values may be stored in place of the WBa_G and WBb_G tables and coefficients, and the gain fixed in advance is adjusted at the time of shipment. After setting the gain, it is possible not to set the gain. As a result, the information capacity of the adjustment information can be further reduced.

  Moreover, it is needless to say that the processing flow of the flowcharts (see FIGS. 4 and 5) described in the present embodiment is an example, and can be appropriately changed without departing from the gist of the present invention.

  Further, the above-described configuration of the digital camera 10 (see FIGS. 1 and 2) is an example, and it goes without saying that the configuration can be appropriately changed without departing from the gist of the present invention.

  For example, in this embodiment, the case where two optical units are provided has been described. However, the present invention is not limited to this, and the present invention is also applicable to a camera including three or more optical system units. be able to.

  In each of the above embodiments, the mode of the digital camera has been described as being set to any one of the 3D shooting mode, the normal shooting mode, and the playback mode by operating the mode switch 52B. The digital camera may be set to either the shooting mode or the playback mode, and a switch for setting either a stereoscopic image mode for handling a stereoscopic image or a normal image mode for handling a normal image may be separately provided. In such a configuration, the digital camera operates in any one of the three-dimensional image shooting mode, the normal image shooting mode, the three-dimensional image reproduction mode, and the normal image reproduction mode according to the operation state of these switches. Become.

  Further, in each of the above embodiments, the case where the present invention is applied to a digital camera has been described. However, the present invention is not limited to a digital camera, and can also be applied to a camera using a silver-lead photographic film. .

It is an external view which shows the external appearance of the digital camera which concerns on embodiment. It is a block diagram which shows the structure of the electric system of the digital camera which concerns on embodiment. It is a functional block diagram of the stereoscopic image signal processing circuit according to the embodiment. It is a schematic diagram which shows an example of the adjustment information which concerns on 1st Embodiment. It is a flowchart which shows the flow of a process of the WB gain setting process program which concerns on 1st Embodiment. It is a schematic diagram which shows an example of the adjustment information which concerns on 2nd Embodiment. It is a flowchart which shows the flow of a process of the WB gain setting process program which concerns on 2nd Embodiment. It is a schematic diagram which shows an example of the adjustment information which concerns on another form. It is a schematic diagram which shows an example of the adjustment information which concerns on 3rd Embodiment. It is a flowchart which shows the flow of a process of the WB gain setting process program which concerns on 3rd Embodiment.

Explanation of symbols

10 Digital Camera 23 Stereo Image Signal Processing Circuit (Adjustment Unit)
32 CPU (setting means)
33 ROM (storage means)
88A First imaging system (imaging optical system)
88B Second imaging system (imaging optical system)

Claims (6)

A plurality of imaging optical systems for acquiring image information indicating subject images from different positions;
An input means for inputting selection information for selecting any one of a plurality of predetermined light source types;
The plurality of light source types and an adjustment value corresponding to each light source type used for white balance adjustment of a plurality of pieces of image information acquired by the plurality of imaging optical systems are associated with some imaging optical systems. And a coefficient for deriving the adjustment value of the remaining imaging optical system based on the adjustment value corresponding to each light source type of the part of the imaging optical system is associated with the remaining imaging optical system in advance. Memorized storage means;
Deriving adjustment values of the remaining imaging optical systems based on the coefficients and adjustment values of the partial imaging optical systems according to the light source type indicated by the selection information input from the input means, Setting means for setting the adjustment value of the system;
Adjusting means for performing the white balance adjustment using the adjustment value set by the setting means;
With a camera. The coefficient is made into two types, a coefficient corresponding to a light source type having a bright line and a coefficient corresponding to a light source type not having a bright line,
The setting means includes the remaining imaging based on a coefficient corresponding to the presence or absence of a bright line of the light source type indicated by the selection information and an adjustment value corresponding to the light source type indicated by the selection information of the partial imaging optical system. deriving an adjustment value of the optical system, according to claim 1, wherein the camera to set the adjustment values of each imaging optical system.   A plurality of imaging optical systems for acquiring image information indicating subject images from different positions;
  An input means for inputting selection information for selecting any one of a plurality of predetermined light source types;
  The plurality of light source types and an adjustment value corresponding to each light source type used for white balance adjustment of a plurality of pieces of image information acquired by the plurality of imaging optical systems are associated with some imaging optical systems. Storage means for storing in advance, and storing in advance a predetermined light source type and an adjustment value corresponding to the light source type in association with the remaining imaging optical system,
  If the light source type indicated by the selection information input by the input means is a light source type other than the predetermined light source type, an adjustment value corresponding to the predetermined light source type of the part of the imaging optical system; A ratio of the remaining imaging optical system to the adjustment value according to the predetermined light source type is derived, and the adjustment value according to the ratio and the light source type indicated by the selection information of the partial imaging optical system is used. Setting means for deriving adjustment values for the remaining imaging optical systems and setting adjustment values for each imaging optical system;
  Adjusting means for performing the white balance adjustment using the adjustment value set by the setting means;
  With a camera.   A plurality of imaging optical systems for acquiring image information indicating subject images from different positions, and an input means for inputting selection information for selecting any one of a plurality of predetermined light source types. Control method of the camera,
  The plurality of light source types and an adjustment value corresponding to each light source type used for white balance adjustment of a plurality of pieces of image information acquired by the plurality of imaging optical systems are associated with some imaging optical systems. And a coefficient for deriving the adjustment value of the remaining imaging optical system based on the adjustment value corresponding to each light source type of the part of the imaging optical system is associated with the remaining imaging optical system in advance. Remember,
  Deriving adjustment values of the remaining imaging optical systems based on the coefficients and adjustment values of the partial imaging optical systems according to the light source type indicated by the selection information input from the input means, Set the system adjustment value,
  Perform the white balance adjustment using the set adjustment value
  Camera control method.   The coefficient is made into two types, a coefficient corresponding to a light source type having a bright line and a coefficient corresponding to a light source type not having a bright line,
  The adjustment value of the remaining imaging optical system based on the coefficient according to the presence or absence of the bright line of the light source type indicated by the selection information and the adjustment value according to the light source type indicated by the selection information of the partial imaging optical system The camera control method according to claim 4, wherein an adjustment value for each imaging optical system is set.   A plurality of imaging optical systems for acquiring image information indicating subject images from different positions, and an input means for inputting selection information for selecting any one of a plurality of predetermined light source types. Control method of the camera,
  The plurality of light source types and an adjustment value corresponding to each light source type used for white balance adjustment of a plurality of pieces of image information acquired by the plurality of imaging optical systems are associated with some imaging optical systems. And storing in advance a predetermined light source type and an adjustment value corresponding to the light source type in association with the remaining imaging optical system,
  If the light source type indicated by the selection information input by the input means is a light source type other than the predetermined light source type, an adjustment value corresponding to the predetermined light source type of the part of the imaging optical system; A ratio of the remaining imaging optical system to the adjustment value according to the predetermined light source type is derived, and the adjustment value according to the ratio and the light source type indicated by the selection information of the partial imaging optical system is used. Deriving adjustment values for the remaining imaging optical systems, setting adjustment values for each imaging optical system,
  Perform the white balance adjustment using the set adjustment value
  Camera control method.

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