JP2009164878A - Imaging system and imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily customize a white balance adjustment as a user desires. <P>SOLUTION: A digital camera 10 is connected to a personal computer 62 to fetch image data D1 from a memory card 59 into the personal computer 62 and a selection image is displayed on a display 63. The personal computer 62 is operated to input an evaluation value for a color tone of the selection image. When any colorimetric data whose evaluation value has been stored already match colorimetric data of the selection image, all evaluation values in the past associated with the colorimetric data and the evaluation value of the selection image are additionally averaged, a correction parameter stored in a flash memory 48 is corrected with the obtained evaluation value, and the evaluation value is stored in association with the colorimetric data. When no colorimetric data match, the correction parameter is corrected with the evaluation value of the selection image, the evaluation value is stored in association with the colorimetric data. As the number of imaging times increases, the correction parameter is corrected, so that the color tone of the image gradually matches the user's taste. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an imaging system and an imaging apparatus that capture an image of a subject to generate an imaging signal and correct white balance of the imaging signal.

  A digital camera or camera-equipped mobile phone that captures a subject (photoelectric conversion) using a CCD-type or CMOS-type solid-state imaging device, converts the obtained imaging signal into digital image data, and stores it in a storage medium such as a memory card Imaging devices such as telephones are widespread. Many of such photographing apparatuses have a function of automatically adjusting the white balance (auto white balance function) in order to accurately reproduce the color of the subject without losing the color balance.

As an imaging apparatus having such an auto white balance function, an auxiliary imaging system is provided in addition to the main imaging system for imaging, and focus adjustment, exposure adjustment, and white balance adjustment are performed using this auxiliary imaging system. One is known (Patent Document 1). On the other hand, there is known a photographing apparatus capable of updating firmware including a white balance adjustment function using a removable memory card (Patent Document 2).
JP-A-6-303486 JP 7-274060 A

  By the way, the quality of an image is often determined by personal preference. However, in the photographing apparatus described in Patent Document 1, since white balance can be adjusted only with the setting provided by the manufacturer, there is a drawback that it is not possible to photograph an image with a hue that sufficiently reflects the user's preference. is there. In the photographing apparatus described in Patent Document 2, although the white balance adjustment may be corrected to the user's preference by updating the firmware, the work of rewriting the firmware requires specialized knowledge. It is not something that a general user can easily do.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an imaging system and an imaging apparatus that can easily customize white balance adjustment to the user's preference.

  An imaging system of the present invention determines an correction parameter based on an image sensor that captures an image of a subject, generates an image, a colorimetric sensor that performs colorimetry on the subject, and colorimetric data obtained by the colorimetric sensor. A white balance adjustment circuit that adjusts the white balance of the image; and an image that is detachably electrically connected to the white balance adjustment circuit and that has been subjected to white balance adjustment by the white balance adjustment circuit. A correction parameter comprising: a display unit that performs input; an input unit that enables input of an evaluation value of a hue of an image displayed on the display unit; and a control unit that changes the correction parameter based on the evaluation value from the input unit And a changing device.

  The correction parameter changing device includes a storage unit that accumulates and stores evaluation values input from the input unit for each of different colorimetric data, and the control unit is based on the evaluation values input from the input unit. When changing the correction parameter, if the colorimetric data of the image is the same as any one of the colorimetric data for which the evaluation value is stored in the storage unit, the past colorimetric data stored in the storage unit for the colorimetric data is stored. The correction parameter is changed on the basis of an evaluation value obtained by a statistical process taking the evaluation value into consideration.

  The statistical processing is characterized by averaging all new evaluation values and past evaluation values input from the input unit. A plurality of colorimetric sensors are provided.

  An imaging device according to the present invention determines an correction parameter based on an image sensor that captures an image of a subject and generates an image, a colorimetric sensor that performs colorimetry on the subject, and colorimetric data obtained by the colorimetric sensor. A white balance adjustment circuit that adjusts the white balance of the image, a display unit that displays an image that has been subjected to white balance adjustment by the white balance adjustment circuit, and an image that is displayed on the display unit And an input unit that can input an evaluation value of the color tone, and a control unit that changes the correction parameter based on the evaluation value from the input unit.

  A storage unit that accumulates and stores evaluation values input from the input unit for each different colorimetric data is provided, and the colorimetric data newly obtained by the colorimetric sensor is stored in the storage unit as an evaluation value. The control unit changes the correction parameter based on an evaluation value obtained by a statistical process of the colorimetric data taking into account a past evaluation value stored in the storage unit. It is characterized by doing.

  The statistical processing is characterized by averaging all new evaluation values and past evaluation values input from the input unit. A plurality of colorimetric sensors are provided.

  According to the photographing system and the photographing apparatus of the present invention, the image subjected to the white balance adjustment by the white balance adjustment circuit is displayed on the display unit, and the correction parameter is changed by inputting the evaluation value of the hue of the image. The white balance adjustment can be easily customized to the user's preference. Further, when the colorimetric data newly obtained by the colorimetric sensor is the same as any one of the colorimetric data whose evaluation values are stored in the storage unit, the evaluation value obtained by the statistical processing in consideration of the past evaluation values is obtained. Since the correction parameter is changed based on this, white balance adjustment close to the user's preference is gradually performed as the number of photographing increases. Further, if the new evaluation value input from the input unit and all of the past evaluation values are averaged, an evaluation value reflecting the user's preference can be easily obtained. If a plurality of colorimetric sensors are provided, white balance adjustment can be performed in consideration of not only the color temperature of the subject but also the so-called environmental color temperature such as the color temperature above the subject.

  The digital camera which is the photographing apparatus of the present invention is provided with a colorimetric sensor, and the white balance of the image pickup signal is adjusted based on the colorimetric data output from the colorimetric sensor. Color measurement data used for white balance adjustment is attached to digital image data obtained from an image pickup signal, and the image data and color measurement data are stored in a memory card. A digital camera is connected to a personal computer with a cable, image data is taken from the memory card into the personal computer, and the image is displayed on a display. The user evaluates the hue of the image and inputs an evaluation value so as to be more personalized. The correction parameter stored in the digital camera is corrected based on the addition average value of the evaluation values input in the past including the evaluation value. As a result, a user-desired hue can be gradually obtained. This will be specifically described below.

  In FIG. 1 showing the appearance of the digital camera 10, a photographing lens 12 that is a retractable zoom lens, a colorimetric sensor 13, and a strobe light emitting unit 14 are provided on the front surface of the camera body 11 of the digital camera 10. Although not shown, a card slot for mounting a memory card 59 (see FIG. 3) is provided on the left hand side of the camera body 11.

  On the upper surface of the camera body 11, a ring-shaped mode switching dial 16 for switching modes by rotating, a shutter button 17 provided at the center, and a power button 18 are disposed.

  The shutter button 17 is configured in a two-stage system, and in the “half-pressed” state where the shutter button 17 is lightly pressed to stop, AF and AE are locked after the automatic focus control (AF) and automatic exposure control (AE) are activated, and “half-press” Shooting is performed in the state of “full press” in which the image is further pushed down. Note that a display (LCD) 53 (see FIG. 3) and various operation buttons are provided on the back of the camera body 11.

  The colorimetric sensor 13 measures the color temperature of the subject. As shown in FIG. 2, the colorimetric sensor 13 covers three photodiodes 24 formed on a semiconductor substrate 23 with R, G, B filters 25 to 27, and each photodiode 24 has a floating diffusion ( FD) A capacitor 28, a source follower amplifier 29, and an A / D converter 30 are provided.

  When the photodiode 24 covered with the R filter 25 receives the subject light and outputs a signal charge, the signal charge is accumulated in the FD capacitor 28 and converted into a signal voltage corresponding to the accumulated charge amount. This signal voltage is buffered and amplified by the source follower amplifier 29 and then input to the A / D converter 30. The A / D converter 30 converts the signal voltage into digital color measurement data of the red component and sends it to a WB gain calculation circuit 47 (see FIG. 3) described later.

  Similarly, the output from the photodiode 24 covered with the G filter 26 is the color measurement data of the green component, and the output from the photodiode 24 covered with the B filter 27 is the color measurement data of the blue component. Sent to.

  In FIG. 3 showing the electrical configuration of the digital camera 10 and the photographing system of the present invention, when the power is turned on by pressing the power button 18, the CPU 35 stores the control program stored in the flash memory 36 into the RAM 37. To initialize. Thereafter, the CPU 35 controls each part of the camera body 11 via the data bus 39 according to various operation signals input from the operation part 38 including the mode switching dial 16, the shutter button 17, and the power button 18.

  The photographing lens 12 includes a lens group including a variable power lens for changing the focal length (magnification) and a focusing lens for adjusting the focal point, and an aperture. These movements are performed by a motor, and this motor is driven by a motor drive unit 41 controlled by the CPU 35.

  The aforementioned CCD image sensor (hereinafter simply referred to as “CCD”) 43 is disposed behind the photographing lens 12. The CCD 43 includes a plurality of photoelectric conversion elements (photodiodes) arranged two-dimensionally on the light receiving surface, and the photoelectric conversion elements photoelectrically convert a subject image that has passed through the photographing lens 12 and is formed on the light receiving surface. The CCD 43 generates a signal charge corresponding to the amount of received light for each photoelectric conversion element, and generates an imaging signal by converting each signal charge into a voltage signal. The CCD 43 is provided with R, G, and B color filters, and the imaging signal includes R, G, and B color components.

  The CCD 43 is controlled based on a timing signal (clock pulse) input from a timing generator (TG) 44. When displaying a through image, an image signal of a field image (even field or odd field) is read from the CCD 43 and input to the CDS / AMP circuit 45. At the time of shooting, a frame image pickup signal is read from the CCD 43 and input to the CDS / AMP circuit 45.

  The CDS / AMP circuit 45 includes a correlated double sampling circuit (CDS) and an amplifier (AMP). The CDS performs correlated double sampling to remove noise included in the imaging signal and generate R, G, and B imaging signals that accurately correspond to the amount of signal charges. The AMP amplifies R, G, and B color components included in the imaging signal.

  A WB gain calculation circuit 47 is connected to the CDS / AMP circuit 45. The WB gain calculation circuit 47 calculates gains of R, G, and B components that are correction parameters based on the colorimetric data input from the colorimetric sensor 13 (determination of correction parameters), and calculates each gain obtained. The data is sent to the CDS / AMP circuit 45. The correction parameters determined from the colorimetric data by the WB gain calculation circuit 47 are stored in the flash memory 48.

  The AMP of the CDS / AMP circuit 45 adjusts the white balance of the image pickup signal by multiplying the R, G, B color components of the image pickup signal by the respective gains input from the WB gain calculation circuit 47.

  The data bus 39 includes a CPU 35, a CDS / AMP circuit 45, an A / D converter 46, an image signal processing circuit 50, a compression / decompression processing circuit 51, a video encoder 52, an SDRAM 53, a media controller 54, and an AE / AF detection circuit. 55 is connected. In addition to the operation unit 38, flash memory 33, and RAM 34, a strobe device 56 that causes the strobe light emitting unit 14 to emit light is connected to the CPU 35.

  The imaging signal output from the CDS / AMP circuit 45 is converted into digital image data by the A / D converter 46 and then sent to the image signal processing circuit 50. The image signal processing circuit 50 performs various image processing such as gradation conversion and γ correction processing and YC conversion processing on the image data. Before the shooting process is executed in the shooting mode, the image data (field image) of the through image input to the image signal processing circuit 50 is subjected to simple image processing and YC conversion processing and temporarily stored in the SDRAM 53. Written in.

  The SDRAM 53 has a memory area for a through image that stores a continuous two-field fraction, and writes to the other while reading from one. The video encoder 52 converts the image data written in the SDRAM 53 into a composite signal and displays it as a through image on the LCD 58.

  When the photographing process is executed, the image data of the frame image input to the image signal processing circuit 50 is subjected to full-scale image processing and YC conversion processing, temporarily stored in the SDRAM 53, After being subjected to compression processing by the compression / decompression processing circuit 51, it is stored in the memory card 59 via the media controller 54. The colorimetric data C1 used for the white balance adjustment is attached to the image data D1 stored in the memory card 59.

  The AE / AF detection circuit 55 performs exposure detection and focus position detection based on the image data. In exposure detection, the luminance level of the image data output from the A / D converter 46 is integrated for one screen, and this integrated value is output to the CPU 35 via the data bus 39 as exposure information. In the focus position detection, only the high frequency component of the luminance level is extracted from the imaging signal and integrated, and this integrated value is output to the CPU 35 as a focus evaluation value. Based on the detection result input from the AE / AF detection circuit 55, the CPU 35 controls the motor drive unit 41 and the TG 44 to adjust the shutter speed and the aperture value to optimum values.

  For example, a USB interface 60 for exchanging data with the outside is connected to the flash memory 48 and the media controller 54. A personal computer 62 can be electrically connected to the interface 60 using a USB cable 61. By operating the personal computer 62 with the digital camera 10 connected to the personal computer 62, a general user can easily rewrite the correction parameters stored in the flash memory 48.

  Dedicated software for rewriting the correction parameters is installed in the personal computer 62. When the digital camera 10 is connected via the USB cable 61 and the interface 60, the dedicated software is automatically activated, and the memory card All image data stored in 59 is read. As a result, the image of the read image data is displayed as a thumbnail on the screen of the display 63 connected to the personal computer 62 as shown in FIG.

  When a desired image is selected from the thumbnail-displayed images, the selected image 64 is enlarged and displayed on the display 63 as shown in FIG. Is displayed. On the color adjustment panel 65, characters “red strong”, “blue strong”, “GOOD”, “red weak”, and “blue weak” are sequentially arranged from the top to the bottom. A radio button is attached.

  The user observes the selected image 64 and evaluates the hue thereof. For example, if the user thinks that the hue of the selected image 64 is his / her preference, the user operates the mouse 66 to move the cursor 67 to the radio button on the right side of “GOOD”. And click. For example, when it is better to increase the redness of the selected image 64, the radio button on the right side of “red strong” is clicked. In conjunction with this click operation, the color of the selected image 64 displayed on the display 63 changes.

  The user observes the change in the hue of the selected image 64 and, if he thinks that this is acceptable, presses the enter key on the keyboard 68 or operates the mouse 66 and clicks the determination key 69 on the screen. Thus, the evaluation value of the hue of the selected image 64 is stored in the folder 71 (see FIG. 5) formed on the hard disk 70 of the personal computer 62 by the dedicated software of the personal computer 62, and the USB cable 61 and the interface 60 are also stored. The correction parameter stored in the flash memory 48 is corrected based on the evaluation value.

  The evaluation values of the hue of the selected image 64 are, for example, “4”, “−4”, “1” for “red strong”, “blue strong”, “GOOD”, “red weak”, and “blue weak”, respectively. ”,“ 2 ”, and“ −2 ”, and are associated with the colorimetric data of each image as shown in FIG. Thereafter, evaluation values are accumulated and stored in order of photographing date for each different colorimetric data.

  When the new selected image taken after the next time is displayed on the display 63 and any of the radio buttons on the color adjustment panel 65 is clicked and then the enter key 69 is clicked, the dedicated software measures the new selected image. It is checked whether the color data matches any of the colorimetric data for which some evaluation value is already stored in the folder 71.

  When there is matching color measurement data, all evaluation values stored in association with the color measurement data (for example, when the value of the color measurement data is “15”, the evaluation values are “1” and “2”). , “1”,...) And the evaluation value input for the new selected image are averaged, and the correction parameter stored in the flash memory 48 is corrected based on the obtained evaluation value. , Stored in association with the same colorimetric data in the folder 71.

  If there is no matching colorimetric data, the evaluation value input for the new selected image is stored in association with the colorimetric data of the selected image, and stored in the flash memory 48 based on the evaluation value. Correct the correction parameter.

  The operation of the imaging system configured as described above will be described with reference to the flowchart shown in FIG. It is assumed that the digital camera 10 is set to the shooting mode. A field image pickup signal is read from the CCD 43 (st 1) and input to the CDS / AMP circuit 45. On the other hand, the color measurement data of the subject is input from the color measurement sensor 13 to the WB gain calculation circuit 47.

  The WB gain calculation circuit 47 determines correction parameters (gains of R, G, and B components) based on the color measurement data input from the color measurement sensor 13 (st2), and inputs the correction parameters to the CDS / AMP circuit 45. To do. The AMP of the CDS / AMP circuit 45 performs white balance adjustment by amplifying each color component of the image pickup signal using each gain input from the WB gain calculation circuit 47 (st3). This white balance adjustment is repeated every time the image signal of the field image is read.

  The imaging signal for which white balance adjustment has been completed is converted to digital image data by the A / D converter 46 and then input to the image signal processing circuit 50. The image data is subjected to various processes by the image signal processing circuit 50, temporarily stored in the SDRAM 53, and then displayed on the LCD 58 as a through image (st4).

  When the shutter button 17 is fully pressed (st5), a frame image pickup signal is read from the CCD 43 (st6). The WB gain calculation circuit 47 determines a correction parameter based on the color measurement data input from the color measurement sensor 13 at the same time when the shutter button 17 is fully pressed (st7), and inputs this to the CDS / AMP circuit 45 and flashes. Store in memory 48.

  The image signal of the frame image is converted into R, G, B signals by the CDS / AMP circuit 45 and then individually by the correction parameters (R, G, B component gains) input from the WB gain calculation circuit 47. It is amplified and white balance adjustment is performed (st8). Since each imaging signal is not used for calculating each gain, each gain can be calculated at high speed, and white balance adjustment reflecting the color temperature of the subject light when the shutter button 17 is fully pressed can be performed in real time.

  The image signal subjected to the white balance adjustment is converted into digital image data by the A / D converter 46 and sent to the image signal processing circuit 50. The image data that has been subjected to various processes by the image signal processing circuit 50 is temporarily stored in the SDRAM 53, then compressed by the compression / decompression processing circuit 51, and stored in the memory card 59 by the media controller 54 (st9). ). The image data D1 stored in the memory card 59 is attached with the colorimetric data C1 used for the white balance adjustment to form one image file.

  When photographing with the digital camera 10 is completed (st10), the digital camera 10 and the personal computer 62 are connected via the interface 60 with the USB cable 61 (st11). Dedicated software pre-installed in the personal computer 62 is activated, and image data stored in the memory card 59 is read and displayed as a thumbnail on the display 63. When the user selects a desired image from these, the selected image 64 is displayed large on the display 63 (st12), and the color adjustment panel 65 is displayed on the right side thereof.

  The user observes the selected image 64, evaluates the hue, and clicks a radio button arranged on the right color adjustment panel 65 so that the hue matches the user's preference. For example, when the “blue weak” radio button is clicked, the blueness of the selected image 64 becomes weak, and when the “red strong” radio button is clicked, the redness of the selected image 64 becomes strong.

  When the user feels that the color of the selected image 64 is favorable when the “red strong” radio button is clicked, the user clicks the decision key 69 (st13). As a result, the dedicated software checks whether the colorimetric data of the selected image 64 matches any of the colorimetric data for which some evaluation value is already stored in the folder 71 (st14).

  If there is matching colorimetric data (st14), all the evaluation values stored in association with the colorimetric data and the evaluation values input to the selected image 64 are added and averaged (st15). Based on the obtained evaluation value, the correction parameter stored in the flash memory 48 is corrected (st16) and stored in association with the same colorimetric data in the folder 71 (st17).

  If there is no matching colorimetric data (st14), the correction parameter stored in the flash memory 48 is corrected based on the evaluation value input to the selected image 64 (st16), and the evaluation value is used as the selected image. 64 colorimetric data are stored in association with each other (st17).

  Since the digital camera 10 is connected to the personal computer 62 and correction parameters are corrected each time a new image is taken in this way, the color tone of the image gradually becomes user-preferred as the number of times of shooting increases.

  Next, in FIG. 7 showing a digital camera 72 which is a photographing apparatus of the present invention, the digital camera 72 performs a white balance adjustment of a user's preference by itself without connecting a personal computer. The same members as those of the digital camera 10 are denoted by the same reference numerals and description thereof is omitted.

  In the digital camera 72, the interface 60 is omitted from the digital camera 10, the flash memory 48 is connected to the data bus 39, and the CPU 35 plays the same role as the personal computer 62. For this reason, the flash memory 33 stores software similar to the dedicated software installed in the personal computer 62. When the mode change dial 16 is operated to set the "color change mode", the flash memory 33 is flashed. The data is loaded from the memory 33 to the RAM 34 and executed by the CPU 35.

  When set in the “color change mode”, the video encoder 52 reads the image data from the memory card 59 and displays the image as a thumbnail on the LCD 73 having a touch panel function. When one of the images is selected and touched, the selected image 64 is enlarged and displayed on the LCD 73, and the color adjustment panel 65 is displayed on the right side thereof.

  The user evaluates the hue of the selected image 64 and touches the radio buttons arranged on the right color adjustment panel 65 with a stylus pen or the like so that the hue matches the user's preference. For example, after touching the “blue strong” radio button and then touching the enter key 69, the dedicated software loaded in the RAM 34 is executed and stored in the flash memory 48 based on the evaluation value of “blue strong”. The correction parameter is corrected, and an evaluation value of “blue strong” is stored in the flash memory 33 for each colorimetric data.

  In the embodiment described above, the digital camera and the personal computer are connected by wire (USB cable). However, the present invention is not limited to this and may be connected using, for example, a wireless LAN.

  In the above embodiment, only one colorimetric sensor is used. However, the present invention is not limited to this, and may be two or three, for example. For example, in the case of two, it is preferable that one colorimetric sensor measures the color of the center of the subject and the other one colorimetric sensor measures the color above the subject.

It is a perspective view which shows the external appearance of the digital camera of this invention. It is explanatory drawing which shows the structure of a colorimetric sensor. It is a block diagram which shows the electrical structure of a digital camera, and an imaging | photography system. It is explanatory drawing which shows the outline of a personal computer. It is explanatory drawing which shows the example of the evaluation value matched and memorize | stored for every different colorimetric data. It is a flowchart which shows the main sequences of an imaging | photography system. It is a block diagram which shows the electric constitution of the digital camera which is another embodiment.

Explanation of symbols

10, 72 Digital camera 13 Colorimetric sensor 33, 48 Flash memory 35 CPU
43 CCD
45 CDS / AMP
47 WB gain calculation circuit 59 Memory card 60 Interface 62 Personal computer 63 Display 64 Selected image 65 Color adjustment panel 70 Hard disk 71 Folder 73 LCD
D1 Image data C1 Colorimetric data

Claims (8)

An image sensor that captures an image of an object to generate an image, a colorimetric sensor that performs colorimetry on the object, a correction parameter is determined based on colorimetric data obtained by the colorimetric sensor, and the white balance of the image is determined. A photographing apparatus including a white balance adjustment circuit to be adjusted;
A display unit that is detachably electrically connected to the photographing apparatus and displays an image that has been subjected to white balance adjustment by the white balance adjustment circuit, and an evaluation value of the hue of the image displayed on the display unit can be input And a correction parameter changing device comprising: a control unit that changes the correction parameter based on an evaluation value from the input unit.   The correction parameter changing device includes a storage unit that accumulates and stores evaluation values input from the input unit for each of different colorimetric data, and the control unit is based on the evaluation values input from the input unit. When changing the correction parameter, if the colorimetric data of the image is the same as any one of the colorimetric data for which the evaluation value is stored in the storage unit, the past colorimetric data stored in the storage unit for the colorimetric data is stored. The imaging system according to claim 1, wherein the correction parameter is changed based on an evaluation value obtained by statistical processing taking the evaluation value into consideration.   The imaging system according to claim 2, wherein the statistical processing averages all new evaluation values and past evaluation values input from the input unit.   The photographing system according to claim 1, wherein a plurality of the colorimetric sensors are provided. An image sensor that captures an image of an object to generate an image, a colorimetric sensor that performs colorimetry on the object, a correction parameter is determined based on colorimetric data obtained by the colorimetric sensor, and the white balance of the image is determined. In a photographing apparatus having a white balance adjustment circuit for adjustment,
A display unit for displaying an image subjected to white balance adjustment by the white balance adjustment circuit;
An input unit capable of inputting an evaluation value of the hue of the image displayed on the display unit;
An imaging device comprising: a control unit that changes the correction parameter based on an evaluation value from the input unit.   A storage unit that accumulates and stores evaluation values input from the input unit for each different colorimetric data is provided, and the colorimetric data newly obtained by the colorimetric sensor is stored in the storage unit as an evaluation value. The control unit changes the correction parameter based on an evaluation value obtained by a statistical process of the colorimetric data taking into account a past evaluation value stored in the storage unit. The imaging apparatus according to claim 5, wherein   The imaging apparatus according to claim 6, wherein the statistical processing averages all new evaluation values and past evaluation values input from the input unit.   The photographing apparatus according to claim 5, wherein a plurality of the colorimetric sensors are provided.

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