JP2011120296A - Imaging device, and method of controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To execute image processing reflecting the intent of a user, without performing re-imaging to an image photographed. <P>SOLUTION: Once imaging data from an imaging element 101 are recorded in a memory 105; an image of a development processing result of imaging data is displayed; when various parameters of white balance processing in digital development processing are determined to be inappropriate for shot images from the display image, an operation for correcting a parameter setting again, and reading imaging data from the memory 105 to be subjected to digital development reprocessing is executed a required number of times; and when image quality intended by a photographer is obtained, it is recorded in a recording medium 117. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for performing digital development processing including a plurality of image processing on an image signal photographed by an image sensor, and recording the digitally processed image on a recording medium after confirming the image on a display unit. It is.

  The spread of digital cameras in the market has rapidly progressed in recent years, and the role as a photographic device is being replaced from a conventional camera using a color film to a digital camera. One of the reasons is to perform digital development processing consisting of a plurality of image processing on the image signal captured by the image sensor, and display it on an image display device such as an attached TFT monitor immediately after shooting. It has a function that can be observed instantaneously. An example of such a digital camera is described in Patent Document 1, for example.

  In film cameras, characteristics such as sensitivity, white balance, and color development are determined by the film loaded in the camera, but in digital cameras, the color of captured images can be changed by changing image processing parameter settings. Can be easily changed.

  FIG. 3 is a block diagram illustrating an example of a configuration of a conventional digital camera including a plurality of color filters.

  The plurality of color filters are assumed to be primary color filters having an arrangement of R (red), Gr1 (green 1), Gr2 (green 2), and B (blue) as shown in FIG. 21, for example. Here, considering the case where Gr1 and Gr2 use different readout amplifiers in terms of circuit configuration, Gr in the R row is Gr1, Gr in the B row is Gr2, and Gr1 and Gr2 are handled as different color components.

  A white balance adjustment processing unit 320 applies white color adjustment data 320 to each color component data 304 of a digital color signal that is captured by the image sensor 301 having a color filter having such an arrangement and A / D converted by the A / D converter 303. A balance adjustment process is performed.

  Here, a white balance control value for performing white balance processing is given as a parameter for each color component. These control values are multiplied for each pixel of each color component, and the ratio of the size of each color signal component in the achromatic portion of the image is R: Gr1: Gr2: B = 1: 1: 1: 1. Is set as follows.

  In the case of auto white balance that automatically obtains a white balance control value suitable for a photographed image from photographed image data, for example, there is a method of obtaining as follows.

  The R: Br ratio and the (R + B) :( Gr1 + Gr2) ratio are obtained from the adjacent R, Gr1, Gr2, and B in the image data, and a star mark 2103 is displayed on the two-dimensional coordinates as shown in FIG. A combination of R, Gr1, Gr2, and B located in a coordinate range 2101 in the vicinity of a locus line 2102 called a black body radiation locus or CIE daylight locus is defined as an achromatic region. Then, integral values SumR, SumGr1, SumGr2, and SumB for each color component in the region are obtained, and the SumR: SumGr1: SumGr2: SumB ratio is obtained therefrom, and the ratio becomes 1: 1: 1: 1. The white balance control values WbR, WbGr1, WbGr2, and WbB are obtained as follows.

WbR = (SumGr1 + SumGr2) / (2 × R) (1)
WbGr1 = (SumGr1 + SumGr2) / (2 × Gr1) (2)
WbGr2 = (SumGr1 + SumGr2) / (2 × Gr2) (3)
WbB = (SumGr1 + SumGr2) / (2 × B) (4)
In auto white balance, this white balance control value is determined for the optimum color temperature of the light source in this image, and WbR for the R filter pixel and WbGr1 for the Gr1 filter pixel in the image data. The white balance adjustment processing is performed by multiplying the pixel of the Gr2 filter by WbGr2 and the pixel of the B filter by WbB.

  In addition to this auto white balance, preset white balance for performing white balance adjustment processing by giving constant control values WbR, WbGr1, WbGr2, and WbB with respect to the color temperature of a predetermined light source, or under the same light source as the light source for photographing There is a manual white balance in which an achromatic object is photographed in advance, and white balance control values WbR, WbGr1, WbGr2, WbB are obtained from R, Gr1, Gr2, B data of the photographed image.

  Next, with respect to the image signal subjected to the white balance processing, the level correction unit 322 uniformly gives the same gain value as a parameter for each color component regardless of the pixel, and multiplies each signal component by this to obtain a signal level. Perform the correction.

  The low-pass filter processing unit 324 performs low-pass filter processing on the image signal subjected to level correction.

  Here, each pixel corresponding to each color filter is separated into four types of two-dimensional planes R, Gr1, Gr2, and B, and the pixel arrangement in which no color filter is assigned to each plane as shown in FIG. 0 is assigned to the pixel at the position and inserted, and filtering processing is performed for each two-dimensional plane.

  Next, matrix processing for replacing each color signal component with another color signal component is performed in the matrix processing unit 326 on the signal 325 output from the low-pass filter processing unit 324. For example, the operation for converting the signal components of (R, Gr1, Gr2, B) into the luminance signal Y of (Y, Cr, Cb) and the signal components of color signals Cr, Cb is a 4 × 3 matrix as shown in the following equation: Calculated by conversion.

... (A)
The image signal converted into the (Y, Cr, Cb) signal component is subjected to contrast adjustment processing 328 using a gamma table. For example, a characteristic table for converting a 10-bit input image signal into an 8-bit image signal as shown in FIG. 7 is given as a parameter, and the gradation and contrast of the image are adjusted.

  Of the image data 329 whose contrast has been adjusted by the gamma table, the Cr and Cb signals are sent separately to the color gain correction unit 330 that is color processing, and the Y signal is sent to the contour enhancement unit 333 that is luminance signal processing.

  Among the signal components of (Y, Cr, Cb) separated into luminance / color signal components, the color gain correction unit 330 performs color gain correction processing on the color signal components Cr, Cb. Here, the color gain correction value is used as a parameter, and the color density is adjusted by multiplying the Cr and Cb values by this gain. By this color gain correction, gain is applied on the Cr-Cb coordinates, and the color saturation can be adjusted.

  Further, the hue matrix conversion unit 332 performs a 2 × 2 matrix operation on the color signal components Cr and Cb, thereby adjusting the hue. Here, the hue angle is converted by giving a 2 × 2 matrix as a parameter and converting the coordinates on the (Cr, Cb) two-dimensional coordinates by the following calculation.

... (B)
On the other hand, the edge enhancement processing unit 333 performs edge enhancement processing on the luminance signal component Y. The parameters here include the number of adjacent pixels to be referred to the pixel to be subjected to contour enhancement, the gain value for edge enhancement, and the offset value that is a threshold value for contour detection to perform edge enhancement.

  For example, as illustrated in FIG. 20, if the reference pixels for contour enhancement are eight pixels (a1 to a8) around the target pixel P for contour enhancement, an average value S of nine pixels including the target pixel P is obtained.

  Next, a difference between the target pixel and the average value S is obtained, and when this difference exceeds the offset value th, a contour emphasis gain value Gain is applied and added to the original target pixel P to thereby perform contour emphasis processing. I do.

P ′ = P + (PS−th) · Gain ((PS) ≧ th)
These parameters are used to adjust the strength of image edge enhancement processing. The contour emphasis can be strengthened by increasing the gain value, and the contour emphasis can be weakened by decreasing the gain value. Further, it is possible to weaken the contour emphasis by increasing the offset value, and to strengthen the contour emphasis by decreasing the offset value.

  As described above, the image signal (Y, Cr, Cb) digitally developed by various image processes is converted into an image file in a general-purpose image format such as a JPEG file in the format unit 309, and the image recording unit 317 is processed. The recording is performed on various recording media that can be removed from the camera body, such as a CompactFlash (registered trademark) memory card.

JP 2003-134530 A

  According to the above description, an image reflecting the intention of the user of the digital camera to various shooting conditions by setting various image processing parameters for digital development processing of the shot image before shooting. It is possible to realize the processing. However, if an image with an image quality that does not reflect the photographer's intention is captured due to changes in shooting conditions during shooting, it is necessary to reset each parameter and take another shot. Since it is not known until the image confirmation after shooting whether the image is optimal, there is a case where re-shooting is repeated, and there is a case where a shooting scene intended by the photographer is missed.

  Therefore, the present invention has been made in view of the above-described problems, and the object thereof is to perform white balance processing that reflects the user's intention on the captured image without re-imaging. Is to do so.

  In order to solve the above-described problems and achieve the object, an imaging apparatus according to the present invention performs imaging processing for capturing a subject image, and performs predetermined processing on a first image signal output from the imaging means. A first storage means for storing the generated second image signal; and a third image signal obtained by subjecting the second image signal to white balance based on a predetermined RGB white balance control value. Image processing means to be generated, display means for displaying the third image signal and chromaticity coordinate system, second storage means for storing the third image signal, and RGB white balance in the image processing means Changing means for changing a control value; and recording instruction means for instructing to read the third image signal from the second storage means and record it on a recording medium, and the display means includes the chromaticity Coordinate system And the chromaticity coordinate point corresponding to the RGB white balance control value used to generate the third image signal and the white balance processing of the second image signal that has been changed by the changing means. The chromaticity coordinate point corresponding to the white balance control value of power RGB is displayed.

  According to the present invention, it is possible to perform white balance processing that reflects a user's intention on a captured image without re-imaging.

1 is a block diagram illustrating a configuration of a digital camera that is an example of an imaging apparatus according to a first embodiment of the present invention. It is a block diagram which shows the structure of the digital camera which is an example of the imaging device which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows an example of a structure of the conventional digital camera. It is a figure which shows the back surface of the digital camera of the 1st Embodiment of this invention. It is a figure which shows the information display part of FIG. It is a figure which shows a gamma table characteristic. It is a figure which shows a gamma table characteristic. It is a figure which shows the back surface of the digital camera of the 2nd Embodiment of this invention. It is a figure which shows the information display part of FIG. 8, and is a figure which shows the state which displayed the image processing menu. It is a figure which shows the information display part of FIG. 8, and is a figure which shows the state which displayed the development result by the standard parameter of white balance. It is a figure which shows the information display part of FIG. 8, and is a figure which shows the display in the case of switching the parameter of a white balance. It is a figure which shows the information display part of FIG. 8, and is a figure which shows the display in the case of switching the parameter of level correction. It is a figure which shows the information display part of FIG. 8, and is a figure which shows the display in the case of switching the parameter of a low-pass filter characteristic. It is a figure which shows the information display part of FIG. 8, and is a figure which shows the display in the case of switching the parameter of a color conversion matrix. It is a figure which shows the information display part of FIG. 8, and is a figure which shows the display in the case of switching the parameter of a gamma characteristic. It is a figure which shows the information display part of FIG. 8, and is a figure which shows the display in the case of switching the parameter of color gain correction | amendment. It is a figure which shows the information display part of FIG. 8, and is a figure which shows the display in the case of switching the parameter of hue adjustment. It is a figure which shows the information display part of FIG. 8, and is a figure which shows the display in the case of switching the parameter of outline emphasis. It is a figure which shows the correspondence table of chromaticity coordinate X and color temperature for calculating | requiring white balance. It is a figure showing the black body radiation locus | trajectory on a chromaticity coordinate for calculating | requiring white balance, or a CIE daylight locus | trajectory, and an achromatic region. It is a figure which shows the relationship between the object pixel at the time of performing an outline emphasis process, and a surrounding pixel. It is a figure explaining the arrangement | sequence of the color filter on the image pick-up element in the imaging part of a digital camera. It is a figure explaining the process for every color component of image data.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing a configuration of a digital camera which is an example of an imaging apparatus according to the first embodiment of the present invention. In the first embodiment, a case where a digital camera is adopted as an example of the imaging device will be described. However, the imaging device according to the first embodiment is a digital video camera, a device with a digital camera (a mobile phone with a digital camera). Etc.).

  In the present embodiment, after confirming the result of developing the photographed image by the digital development processing unit on the image display unit, one or more types of image processing parameters among a plurality of types of image processing of the digital development processing unit are set. Switch and redevelop. Then, after it is confirmed that the re-development result is a desired development result in the image display unit, recording is performed on the recording medium in the recording unit in accordance with an instruction from the recording instruction unit.

  In FIG. 1, 101 is an image sensor that is an image pickup unit including a plurality of color filters, and 103 is an A / A that converts a first image signal 102 output from the image sensor 101 into a second image signal 104 that is digital data. D conversion unit, 105 is a first memory for recording the second image signal 104 after A / D conversion, 106 is a digital development processing unit that performs digital development processing including a plurality of image processings, and 107 is digital development. A third image signal (color difference signal) generated by the processing, 109 is a format unit that converts the signal 108 (brightness signal) into an image file, and 111 is an image display unit that displays data 110 obtained by converting the third image signal into a file. , 112 is a second memory for storing data 110 obtained by filing the third image signal, and 117 is a third memory read from the second memory 112. A recording unit 113 records the data 116 obtained by filing the image signal, and 113 records the data obtained by filing the third image signal from the second memory 112 and records the data on the recording medium 117 that can be taken out from the camera. A recording instruction unit that outputs an instruction signal 114.

  The digital development processing unit 106 that performs digital development processing includes a white balance adjustment processing unit 120, a gain processing unit 122 that performs image signal level adjustment, a low-pass filter processing unit 124, and a matrix calculation processing unit 126 that converts the configuration of color components. , A gamma characteristic table conversion processing unit 128 that adjusts contrast, a color gain correction processing unit 130 that applies gain to color components, a hue adjustment processing unit 132 that converts hue, and an outline enhancement processing unit 133.

  Further, a parameter switching instruction unit 134 outputs an instruction signal 137 for switching these image processing parameters, and outputs an instruction signal 135 for reading out the second image signal 136 from the first memory 105 and re-developing it. Of the switching instruction signal 137 to each parameter, the parameter of the white balance adjustment processing unit 120 is 137a, the parameter of the gain processing unit 122 is 137b, the parameter of the low-pass filter processing unit 124 is 137c, and the parameter of the matrix calculation processing unit 126 is 137d. The parameter of the gamma characteristic conversion processing unit 128 is switched by 137e, the parameter of the color gain correction processing unit 130 is 137f, the parameter of the hue adjustment processing unit 132 is switched by 137g, and the parameter of the contour enhancement processing unit 133 is switched by 137h.

  Similar to the conventional example, an image signal 102 composed of (R, G1, G2, B) four color components obtained from the image sensor 101 having four color filters (R, G1, G2, B). Is converted into a digital second image signal 104 by the A / D converter 103.

  This digital image signal 104 will be described later, in addition to being sent to the digital development processing unit 106 when a subsequent shooting is performed by pressing the image adjustment switch 404 on the back surface 400 of the digital camera shown in FIG. It is set to be sent to and held in the first memory 105 that can be read by the re-development instruction signal 135.

  The digital development processing unit 106 performs the first digital development processing on the image signal 104 after photographing. At this time, parameters in various image processing are processed in a default setting state.

  In the present embodiment, the processing in the digital development processing unit 106 includes a white balance adjustment processing unit 120, a level correction unit 122 that performs image signal level adjustment, a low-pass filter processing unit 124, and a matrix calculation process that converts the configuration of color components. Various image processes in a unit 126, a gamma characteristic table conversion processing unit 128 that adjusts contrast, a color gain correction processing unit 130 that applies a gain to a color component, a hue adjustment processing unit 132 that converts a hue, and an outline enhancement processing unit 133 Among them, a case will be described in which re-development is performed by changing a combination of parameters of the gamma characteristic table conversion processing unit 128, the color gain correction processing unit 130, and the contour enhancement processing unit 133 as development parameters.

  FIG. 6 is a diagram illustrating a gamma characteristic table in the present embodiment. Here, the horizontal axis is the input level of this processing unit 10 bits, and the vertical axis is the output level 8 bits.

  In contrast to the default table 601, the curve in the table 602 is a characteristic table for outputting an image with high contrast. The curve in the table 603 is a table of characteristics for outputting an image with low contrast. The gamma characteristic table, which is a parameter, is switched between three types of “default”, “high contrast”, and “low contrast” by a parameter switching instruction command 137e.

  In addition, the color gain correction processing unit 130 increases the color saturation of the development result by multiplying the color gain by 1.2 times in the processing with high color density, whereas the color gain is 1.0 times by default. A process with low color density is multiplied by 0.8 to lower the color saturation of the development result. By the parameter switching instruction command 137f, the parameter color gain correction table is switched between three types of “default”, “high color density”, and “low color density”.

  Furthermore, in the edge enhancement processing unit 133, the gain value of edge enhancement described in the conventional example is set to 1.0 times by default, whereas the edge enhancement strong is 2.0 times, and the edge enhancement weak is 0.0. Double to change the level of edge enhancement. In addition, the offset value is set to 4.0 by default, and 2.0 is given as a setting for enhancing the edge enhancement. In response to the parameter switching instruction command 137h, the contour emphasis table as a parameter is set to “default” (gain value 1.0, offset value 4.0), “strong” (gain value 2.0, offset value 2.0). ), “Weak (outline enhancement off)” (gain value 0.0, offset value arbitrary).

  Combining the above three types of image processing tables, the combination of “gamma characteristic table → default”, “color gain correction table → default”, “outline enhancement table → default” is “development parameter 1”, and “gamma characteristic table → The combination of “High contrast”, “Color gain correction table → High color density”, “Outline enhancement table → High” is “Development parameter 2”, and “Gamma characteristic table → Low contrast” “Color gain correction table → Low color density” “Outline” A combination of “enhancement table → weak (contour emphasis off)” is set as “development parameter 3”.

  Here, a characteristic operation of the present embodiment will be described.

  As described above, when the image adjustment switch 404 on the back side of the digital camera shown in FIG. 4 is pressed and photographing is performed, the image data 104 in FIG. 1 is not subjected to the digital development processing by the digital development processing unit 106. , Sent to and held in the first memory 105. In the digital development processing unit 106, the first digital development processing after photographing is performed in “development parameter 1”, that is, in a default parameter setting state.

  At this time, the third image signals 107 (color difference signals) and 108 (luminance signals), which are the development results, are converted into JPEG files in the format unit 109 and sent to the second memory 112.

  Further, the third image signal converted into the JPEG file is also sent to the display unit 111, and the developed image 502 is displayed on the display unit 501 together with the development parameter selection table 503 as shown in FIG.

  Here, the development parameter to be selected is switched from “development parameter 1” to “development parameter 2” by pressing the cross key 412 on the back of the camera shown in FIG. With this operation, the parameter switching instruction signal 137 is output from the switching instruction unit 134 of FIG. 1, the gamma characteristic table is changed from “default” to “high contrast” by 137e, and the color gain correction processing unit is changed from “default” to “high” by 137f. The parameter setting value is switched from “default” to “strong” by the edge enhancement processing unit 137h for “high color density”.

  Then, the second image signal recorded in the first memory is read out by the re-development instruction signal 135 output from the switching instruction unit 134, and the digital development processing unit 106 performs the re-digital development process.

  The re-developed third image signals 107 (color difference signals) and 108 (brightness signals) are converted into JPEG files in the format unit 109, and the filed image signal 110 is sent to the second memory 112. An image file 110 that has been overwritten on the digitally developed image file with development parameter 1 ”or recorded in another area and further filed is sent to the display unit 111 and displayed until then. It replaces the image data of the digital development processing result by “development parameter 1” and is displayed as the image data of the digital development processing result by “development parameter 2”.

  Further, the development parameter to be selected is switched from “development parameter 2” to “development parameter 3” by pressing the cross key 412 on the back of the camera shown in FIG. By this operation, the parameter switching instruction signal 137 is output from the switching instruction unit 134 of FIG. 1, the gamma characteristic table is changed from “high contrast” to “low contrast” by 137e, and the color gain correction processing unit is set to “high color density” by 137f. The parameter setting values are switched from “strong” to “weak (contour emphasis off)” by 137h, and the digital enhancement processing is performed in the same manner as described above. The image data of the development result by “development parameter 3” is recorded in the second memory 112 and is displayed on the display unit 111 by replacing “development parameter 2”.

  Furthermore, when the cross key 412 on the back of the camera shown in FIG. 4 is pressed, the original state developed with the original “development parameter 1” is restored.

  Also, by pressing the cross key 409 on the back of the camera shown in FIG. 4, the development parameters can be switched in the reverse order.

  The development parameter is switched and the digital development processing result image 402 appearing on the display unit 111 is observed, and the camera user selects a desired development parameter and presses the parameter selection button 408 shown in FIG. By this operation, a recording instruction command 114 is output from the recording instruction unit 113, and the image file data as a result of the digital development processing based on the selected development parameter is read from the second memory 112 and recorded on the recording medium 117. Is done.

  By switching the development parameters as described above, the standard setting “Development parameter 1” and the standard setting have a stronger contrast, darker color density, enhanced contours, and no post-processing is required. "Development parameter 2" that can be used in the above, and "Development parameter 3" that can be used as a material with a high degree of freedom in post-processing, which has a low contrast with respect to the standard setting, a low color density, and no edge enhancement. The development result is compared with the image 402 displayed on the monitor 401, and the camera user can select and record an image that seems to be optimal.

  In this way, even when an image having an image quality that does not reflect the photographer's intention is captured due to a change in shooting conditions during shooting, digital development processing can be performed by switching and resetting development parameters. It is also possible to easily check whether the set parameters are optimal, eliminating the need to repeat re-shooting, so that the shooting scene intended by the photographer is not missed and the optimal shooting result is obtained. It can be realized at all times.

  In the present embodiment, the development parameter is described in combination with the gamma characteristic table, color gain correction, and edge enhancement processing. However, in addition to this, the white balance adjustment processing unit 120, the matrix calculation processing unit 126, and the hue adjustment processing unit 132 are also described. Can be used to switch the color development characteristics of the developed image, the exposure correction using the level correction unit 122, or the characteristics of the low-pass filter processing unit 124 to switch the tone of the image quality. is there.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.

  FIG. 2 is a block diagram showing a configuration of a digital camera which is an example of an imaging apparatus according to the second embodiment of the present invention. In the second embodiment, a case where a digital camera is adopted as an example of the imaging device will be described. However, the imaging device according to the second embodiment is a digital video camera, a device with a digital camera (a mobile phone with a digital camera). Etc.).

  In the present embodiment, after confirming the result of developing the photographed image by the digital development processing unit on the image display unit, one type of image processing is selected from the plurality of types of image processing of the digital development processing unit, The parameters are switched and re-developed. After confirming that the re-development result is a desired development result on the image display unit, the recording unit records the re-development result on the recording medium in accordance with an instruction from the recording instruction unit.

  In FIG. 2, reference numeral 201 denotes an image pickup element that is an image pickup unit including a plurality of color filters, and 203 denotes an A / A that converts a first image signal 202 output from the image pickup element 201 into a second image signal 204 that is digital data. D conversion unit, 205 is a first memory for recording the second image signal 204, 206 is a digital development processing unit that performs digital development processing including a plurality of image processing, and 209 is a first development generated by digital development processing. 3 is a format unit that converts the image signals 207 (color difference signal) and 208 (luminance signal) into an image file, 211 is an image display unit that displays data 210 that is a file of the third image signal, and 212 is a third image signal. The second memory that holds the data 210 that has been filed, 217 is the third image signal read from the second memory 212 is filed The recording unit 213 for recording the data 216 reads the data obtained by filing the third image signal from the second memory 212 and outputs a recording instruction signal 214 for recording on the recording medium 217 that can be taken out from the camera. The recording instruction unit.

  The digital development processing unit 206 that performs digital development processing includes a white balance adjustment processing unit 220, a gain processing unit 222 that performs image signal level adjustment, a low-pass filter processing unit 224, and a matrix operation processing unit 226 that converts the configuration of color components. , A gamma characteristic table conversion processing unit 228 that performs contrast adjustment, a color gain correction processing unit 230 that applies gain to color components, a hue adjustment processing unit 232 that converts hue, and an outline enhancement processing unit 233.

  Further, among these image processes, 239 is an image processing selection instruction unit that outputs an instruction signal 240 for selecting an image process for switching a parameter. 238 is an image processing selection for selecting an image process for switching a parameter by a selection instruction signal 240. The unit 234 is a parameter switching instruction unit that outputs an instruction signal 237 for switching parameters and outputs an instruction signal 235 for reading out the second image signal 236 from the first memory 205 and re-developing.

  Of the switching instruction signal 237 to each parameter, the parameter of the white balance adjustment processing unit 220 is 237a, the parameter of the gain processing unit 222 is 237b, the parameter of the low-pass filter processing unit 224 is 237c, and the parameter of the matrix calculation processing unit 226 is 237d. The parameter of the gamma characteristic conversion processing unit 228 is switched by 237e, the parameter of the color gain correction processing unit 230 is switched by 237f, the parameter of the hue adjustment processing unit 232 is switched by 237g, and the parameter of the contour enhancement processing unit 233 is switched by 237h.

  Similar to the conventional example, an image signal 202 composed of (R, G1, G2, B) four color components obtained from the image sensor 201 having four color filters (R, G1, G2, B). Is converted into a digital second image signal 204 by the A / D converter 203.

  The digital image signal 204 will be described later in addition to being sent to the digital development processing unit 206 when a subsequent shooting is performed by pressing the image adjustment switch 804 on the rear surface 800 of the digital camera shown in FIG. The re-development instruction signal 235 is set so as to be sent to and held in the readable first memory 205.

  The digital development processing unit 206 performs the first digital development processing on the image signal 204 after photographing. At this time, parameters in various image processing are processed in a default setting state.

  In the present embodiment, the processing in the digital development processing unit 206 includes a white balance adjustment processing unit 220, a level correction unit 222 that performs image signal level adjustment, a low-pass filter processing unit 224, and a matrix calculation process that converts the configuration of color components. Various image processes of a unit 226, a gamma characteristic table conversion processing unit 228 that performs contrast adjustment, a color gain correction processing unit 230 that applies gain to color components, a hue adjustment processing unit 232 that converts hue, and an outline enhancement processing unit 233 Yes, before or after shooting, the image processing menu switch 813 in FIG. 8 is pressed to display the type of image processing on the display screen, the cross keys 809 to 812 are pressed to select the type of image processing, and the set button 808 is pressed. Press this button to switch parameter settings from multiple image processes. To determine.

  By this operation, the third image signals 207 (color difference signals) and 208 (luminance signals) that have been photographed and have been subjected to the digital development processing with the default parameters for the first time are converted into JPEG file format image data in the format unit 209. The image signal 210 is recorded in the second memory 212 and sent to the display unit 211 for display. At this time, the display unit 211 also displays the parameter setting state of the selected image processing. Since this is the first digital development processing result, the default parameter setting value for the selected image processing is displayed as the “standard” setting value.

  Hereinafter, characteristic operations in the present embodiment will be described separately for each case where each image processing is selected.

  First, a description will be given of the case of switching the parameter setting values of the white balance adjustment processing unit 220 in the image processing.

  When an image processing menu switch 813 and cross keys 809 to 812 in FIG. 8 are used to select image processing for switching white balance parameter setting from among image processing in digital development processing, and a set button 808 is pressed, a display unit 801 is displayed. In FIG. 10A, an image 1002 of the digital development processing result by the first “standard” setting value and chromaticity coordinates 1005 representing a point set as a white point of white balance are displayed.

  The R, Gr1, Gr2, and B values that are the basis of the chromaticity coordinates here are obtained from the reciprocals of WbR, WbGr1, WbGr2, and WbB used for white balance control, respectively.

R = 1 / WbR (5)
Gr1 = 1 / WbGr1 (6)
Gr2 = 1 / WbGr2 (7)
B = 1 / WbB (8)
The chromaticity coordinates X and Y have the horizontal axis X (1004) direction as an axis along the black body radiation locus or the daylight locus so that the user can easily grasp the position of the white point. In order to express coordinates and to perform calculations in the camera quickly and easily,
X = (BR) / Yi (9)
The sum-difference calculation represents the Red to Blue direction, that is, the color temperature direction.

  As for the relationship between X and color temperature, an X-color temperature table as shown in FIG. 18 is prepared in advance.

Similarly, the vertical axis Y (1003)
Y = {(R + B)-(Gr1 + Gr2)} / Yi (10)
In this case, it is defined by expressing the Green to Magenta direction.

  Here, Yi is for normalizing the color coordinate XY with the luminance component, and for example, the following expression defined in the NTSC standard may be used.

Yi = 0.299 × R + 0.587 × (Gr1 + Gr2) /2+0.144×B
... (11)
FIG. 10A shows the chromaticity coordinates XY obtained from the white balance control value used in the image processing in the first digital development processing after shooting on the display unit 1001 together with the development result image. The white balance at this time may be any of the control values of auto white balance, preset white balance and manual white balance described in the conventional example.

  Next, in order for the photographer to change the color reproduction of the image of the digital development processing result by the white balance adjustment processing by changing the parameter setting value, the target white point coordinates are changed from the default (X, Y) coordinates. The cross keys 809 to 812 are moved to (X ′, Y ′) on the chromaticity coordinates. In FIG. 10B, the asterisk is the default chromaticity coordinate (X, Y) (1005), and the asterisk is the chromaticity coordinate (X ′, Y ′) (1006) to be changed. The cross keys 810 and 811 are keys that move at regular intervals in the Red to Blue (color temperature) directions, respectively. The cross keys 809 and 812 are keys at regular intervals in the Green and Magenta directions in the + and-directions, respectively. The key to move.

  After moving to the target point, by pressing the set button 808, a signal for reading the second image signal 236 from the first memory 205 and a signal 237a for switching the parameter setting value are output from the parameter switching instruction unit 234 of FIG. To start re-phenomenon processing.

  Since the control value which is a new parameter in the white balance adjustment processing is based on (Gr1 + Gr2) / 2, as can be seen from the equations (1) to (4) of the conventional example, (Gr1 + Gr2) / 2 = 1. Substituting into the expression (10) as 0 times, substituting (X ′, Y ′) into the expressions (9) and (10) allows R ′: Gr ′: B corresponding to (X ′, Y ′). 'The ratio is obtained, and new control values WbR', WbGr1 ', WbGr2', WbB 'which are parameters of the white balance adjustment process changed from the equations (5) to (8) are obtained. Using this parameter, digital re-development processing is performed, and the image file 210 as a development result is sent to the second memory 212 to be recorded and displayed on the display unit 211.

  By repeating this operation, when the image data of the color reproduction result desired by the photographer can be confirmed by the image 1002 reproduced on the display unit 211, the recording instruction unit 213 records the image by pressing the recording instruction switch 805 in FIG. The instruction signal 214 is output, and the image file recorded in the second memory 212 is sent to the recording unit 217 and recorded on the recording medium.

  As described above, by changing the “standard” setting value of the parameter of the white balance processing calculation and recording the re-developed image, an image having a color reproduction desired by the photographer can be obtained.

  Here, the cross keys 809 to 812 are used to set the target value of the white balance white point, change the parameters, and perform the redevelopment. However, each time one of the cross keys 809 to 812 is pressed, it moves. The white balance control value changed based on the numerical value of the (X ′, Y ′) coordinates (1006) may be obtained and re-developed to display the resulting image.

  Next, a case where the setting value of the parameter of the level correction unit 222 is switched in the image processing will be described.

  When the image processing menu switch 813 and the cross keys 809 to 812 in FIG. 8 are used to select image processing for switching the level correction parameter setting from among the image processing in the digital development processing, and the set button 808 is pressed, the display unit 1101 FIG. 11 shows an image 1102 as a result of the digital development processing with the first “standard” set value as shown in FIG. 11 and a gain value 1103 for level correction. In the first digital development processing result, since the photographing result with the appropriate exposure which is “standard” is displayed, “× 1.0” is displayed as shown in FIG.

  When the cross key 809 is pressed, the sequential display changes to “× 1.2”, “× 1.4”,..., And when the cross key 812 is pressed, the sequential display changes to “× 0.8”. , “× 0.6”, and so on. When the photographer reaches a desired gain value, the set value 808 is updated by the signal 237b as the changed parameter setting value of the level correction unit 222 when the set button 808 is pressed. At this time, re-digital development processing is performed using this parameter, and the development result image file 210 is sent to the second memory 212 for recording and displayed on the display unit 211.

  By repeating this operation, when the image data of the exposure desired by the photographer can be confirmed by the image 1102 reproduced on the display unit 211, a recording instruction signal is received from the recording instruction unit 213 by pressing the recording instruction switch 805 in FIG. 214 is output, and the image file recorded in the second memory 212 is sent to the recording unit 217 and recorded on the recording medium.

  As described above, by changing the “standard” setting value of the level correction processing parameter and recording the re-developed image, an image with an exposure desired by the photographer can be obtained.

  Here, the cross-keys 809 and 812 are used to set the gain value that is the target of level correction, change the parameters, and perform redevelopment. However, every time one of the cross-keys 809 and 812 is pressed once. Re-development may be performed with the changed level correction gain value, and the resulting images may be sequentially displayed.

Also, here, the gain value is set to a notation of “× 1.0”, “× 1.2”,..., But “standard” is set to “0” using exposure control based on the EV value. +1.0 ”,“ +2.0 ”,... For example, when“ +1.0 ”, the image signal is multiplied by 2 times, and when“ +1/3 ”, 2 ^(1/3) times. Processing such as applying a gain of may be performed.

  Next, a case where the set value of the parameter of the low-pass filter processing unit 224 is switched in the image processing will be described.

  When the image processing menu switch 813 and cross keys 809 to 812 in FIG. 8 are used to select image processing for switching the low-pass filter parameter setting from among the image processing in the digital development processing, and the set button 808 is pressed, the display unit 1201 FIG. 12 shows an image 1202 and a low-pass filter characteristic 1203 as a result of the digital development processing by the first “standard” set value as shown in FIG. In the result of the first digital development processing, it is displayed that the “standard” is the 3-tap filter “1-2-1” in both the horizontal and vertical directions.

  Here, when the cross key 812 is pressed, the sequential display becomes “LPF2: horizontal 1-2-5-2-1, vertical 1-2-5-2-1” “LPF3: horizontal 1-0-3-0. −1, vertical 1-2-1 ”. When the photographer obtains a desired image, when the set button 808 is pressed, the set value of the parameter changed to the low-pass filter at that time is updated by the signal 237c. At this time, re-digital development processing is performed using this parameter, and the development result image file 210 is sent to the second memory 212 for recording and displayed on the display unit 211.

  By repeating this operation, when the image desired by the photographer can be confirmed by the image 1202 reproduced on the display unit 211, the recording instruction signal 214 is output from the recording instruction unit 213 by pressing the recording instruction switch 805 in FIG. Then, the image file recorded in the second memory 212 is sent to the recording unit 217 and recorded on the recording medium.

  As described above, by changing the “standard” setting value of the low-pass filter parameter and recording the re-developed image, it is possible to obtain an image with a resolution desired by the photographer. In addition, by switching the low-pass filter characteristics, it is possible to cope with the occurrence of a false color in the image.

  In this example, the target characteristic of the low-pass filter is selected using the cross keys 809 and 812, and the parameters are changed to perform redevelopment. However, each time the cross key 809 or 812 is pressed, the change is made. Depending on the characteristics of the low-pass filter, redevelopment may be performed and the resulting images may be displayed sequentially.

  Next, a description will be given of the case of switching the parameter setting values of the matrix calculation processing unit 226 that converts the configuration of the color components in the image processing.

  When the image processing menu switch 813 and the cross keys 809 to 812 in FIG. 8 are used to select image processing for switching the color matrix parameter setting from among the image processing in the digital development processing, and when the set button 808 is pressed, the display unit 1301 is selected. 13, together with the image 1302 of the result of the digital development processing by the first “standard” set value as shown in FIG. 13, the development result by “matrix 1 (standard)” in which the first digital development processing result is “standard” in 1303. Is displayed.

  Here, when the cross key 812 is pressed, the display sequentially changes to “matrix 2”, “matrix 3”, and “matrix 4”. In each matrix table, a matrix table having 4 × 3 element values m11 to m34 that can change the color reproduction in the formula (A) of the conventional example is prepared. When the photographer sets a desired matrix table, when the set button 808 is pressed, the setting value of the parameter changed to the color matrix table at that time is updated by the signal 237d. At this time, re-digital development processing is performed using this parameter, and the image file 210 of the development result is sent to the second memory 212 to be recorded and displayed on the display unit 211.

  By repeating this operation, when the image data of the color reproduction desired by the photographer can be confirmed by the image 1302 reproduced on the display unit 211, the recording instruction unit 213 presses the recording instruction switch 805 in FIG. The signal 214 is output, and the image file recorded in the second memory 212 is sent to the recording unit 217 and recorded on the recording medium.

  As described above, by changing the “standard” setting value of the color matrix parameter and recording the re-developed image, it is possible to obtain an image having a color reproduction desired by the photographer.

  In this example, the cross-keys 809 and 812 are used to select the target table of the color matrix table, change the parameters, and perform redevelopment. However, every time one of the cross-keys 809 and 812 is pressed once, Re-development may be performed using the changed color matrix table, and the resulting images may be sequentially displayed.

  It is also possible to individually select numerical values m11 to m34 of each element of the color matrix by using the cross keys 809 to 812 and the set button 808, and re-develop it by changing the size of these numerical values.

  Next, a description will be given of the case of switching the parameter setting values of the gamma characteristic table conversion processing unit 228 that performs contrast adjustment in image processing.

  When the image processing menu switch 813 and the cross keys 809 to 812 in FIG. 8 are used to select image processing for switching the gamma table parameter setting from among the image processing in the digital development processing, and the set button 808 is pressed, a display unit 1401 is displayed. In FIG. 14, an image 1402 and “gamma 1 (standard)” of the digital development processing result by the first “standard” setting value are displayed in a table 1403 and a characteristic graph 1404.

  Here, when the cross key 812 is pressed, the display sequentially changes to “gamma 2” and “gamma 3”. Each gamma characteristic table has a characteristic table as shown in FIG. Here, the characteristic of “gamma 1” is 601, which is a standard characteristic, the characteristic of “gamma 2” is 602, a characteristic having a stronger contrast than “gamma 1”, and the characteristic of “gamma 3” is 603, “gamma 1”. The contrast is weaker than that.

  When the photographer obtains a desired contrast, when the set button 808 is pressed, the setting value of the parameter changed to the gamma characteristic table at that time is updated by the signal 237e. At this time, re-digital development processing is performed using this parameter, and the development result image file 210 is sent to the second memory 212 for recording and displayed on the display unit 211.

  By repeating this operation, when the image having the contrast desired by the photographer can be confirmed by the image 1402 reproduced on the display unit 1401, the recording instruction signal 214 is received from the recording instruction unit 213 by pressing the recording instruction switch 805 in FIG. Is output, and the image file recorded in the second memory 212 is sent to the recording unit 217 and recorded on the recording medium.

  As described above, an image having a contrast desired by the photographer can be obtained by changing the “standard” setting value of the parameter of the gamma characteristic table and recording the re-developed image.

  In this example, the cross-keys 809 and 812 are used to select the target table of the gamma characteristic table, change the parameters, and perform redevelopment. However, every time one of the cross-keys 809 and 812 is pressed once. Re-development may be performed using the changed gamma characteristic table, and the resulting images may be sequentially displayed.

  Next, a description will be given of the case of switching the parameter setting values of the color gain correction processing unit 230 that applies gain to the color components Cr and Cb in the image processing.

  When the image processing menu switch 813 and the cross keys 809 to 812 in FIG. 8 are used to select image processing for switching the color gain correction parameter setting from among the image processing in the digital development processing, and the set button 808 is pressed, the display unit An image 1502 as a result of the digital development processing with the first “standard” setting value as shown in FIG. 15 and a gain value 1503 for level correction are displayed in 211. In the first digital development processing result, the photographing result with the color gain of 1 times that is “standard” is displayed, so “× 1.0” is displayed as shown in FIG.

  When the cross key 809 is pressed, the sequential display changes to “× 1.2”, “× 1.4”,..., And when the cross key 812 is pressed, the sequential display changes to “× 0.8”. , “× 0.6”, and so on. When the photographer has reached a desired color gain value, when the set button 808 is pressed, the color gain value at that time is updated by the signal 237 f as the parameter setting value changed by the color gain correction unit 230. At this time, re-digital development processing is performed using this parameter, and the development result image file 210 is sent to the second memory 212 for recording and displayed on the display unit 211.

  By repeating this operation, when the image having the color density desired by the photographer can be confirmed by the image 1502 reproduced on the display unit 211, the recording instruction unit 213 presses the recording instruction switch 805 in FIG. The signal 214 is output, and the image file recorded in the second memory 212 is sent to the recording unit 217 and recorded on the recording medium.

  As described above, by changing the “standard” setting value of the parameter of the color gain correction process and recording the re-developed image, it is possible to obtain an image with an exposure desired by the photographer.

  Here, the cross-keys 809 and 812 are used to set a gain value that is a target for color gain correction, and parameters are changed to perform redevelopment. However, every time one of the cross-keys 809 and 812 is pressed once. Re-development may be performed with the gain value of color gain correction changed to, and the resulting images may be displayed sequentially.

  Next, a description will be given of the case of switching the parameter setting values of the hue adjustment processing unit 232 that rotates the hues of the color components Cr and Cb in the image processing.

  When the image processing menu switch 813 and the cross keys 809 to 812 in FIG. 8 are used to select image processing for switching the hue adjustment parameter setting from among the image processing in the digital development processing, and the set button 808 is pressed, the display unit 1601 FIG. 16 shows a digital development processing result image 1602 and a hue adjustment table 1603 according to the first “standard” setting value. In the first digital development processing result, the photographing result by the hue adjustment which is “standard” is displayed, so “standard” is displayed as shown in FIG.

  When the cross key 809 is pressed, the sequential display changes to “+1”, “+2”,..., And when the cross key 812 is pressed, the sequential display changes to “−1”, “−2”,. It will change. In each hue rotation table, a hue rotation table having 2 × 2 element values that can change the color reproduction in the formula (B) of the conventional example is prepared. The 2 × 2 matrix of the formula (B) is a matrix that gives a rotation angle θ on the CrCb color coordinates, and an equal rotation angle is set for each stage of each table.

  When the photographer has reached the desired hue table, when the set button 808 is pressed, the hue rotation matrix at that time is updated by the signal 237g as the setting value of the parameter changed by the hue adjusting unit 232. At this time, re-digital development processing is performed using this parameter, and the development result image file 210 is sent to the second memory 212 for recording and displayed on the display unit 211.

  By repeating this operation, when the image of the color reproduction desired by the photographer can be confirmed by the image 1602 reproduced on the display unit 211, a recording instruction signal is received from the recording instruction unit 213 by pressing the recording instruction switch 805 in FIG. 214 is output, and the image file recorded in the second memory 212 is sent to the recording unit 217 and recorded on the recording medium.

  As described above, by changing the “standard” setting value of the parameter of the hue adjustment process and recording the re-developed image, it is possible to obtain an image having a color reproduction desired by the photographer.

  Here, the description has been made of performing the redevelopment by changing the parameters by setting the hue rotation table that is the target of hue adjustment using the cross keys 809 and 812, but every time one of the cross keys 809 or 812 is pressed once. It is also possible to re-develop with the hue rotation table changed to, and display the resulting images sequentially.

  Next, a case where the set value of the parameter of the contour enhancement processing unit 233 is switched in the image processing will be described.

  When an image processing menu switch 813 and cross keys 809 to 812 in FIG. 8 are used to select image processing for switching outline emphasis parameter setting from among image processing in digital development processing, and a set button 808 is pressed, a display unit 1701 is selected. FIG. 17 shows an image 1702 as a result of the digital development processing with the first “standard” setting value as shown in FIG. 17, a partially enlarged image 1704 of the image, and an outline emphasis table 1703. In the first digital development processing result, the image pickup result by the outline emphasis that is “standard” is displayed, and therefore “standard” is displayed as shown in FIG.

  When the cross key 809 is pressed, the display is sequentially changed to “+1” and “+2”, and when the cross key 812 is pressed, the display is sequentially changed to “−1” and “−2”. . Each of the contour enhancement tables is prepared as a table for changing the strength of contour enhancement as in the conventional example.

As in the conventional example, the number of adjacent pixels to be referred to the pixel to be contour-enhanced, the edge emphasis gain value, and the offset value that is the edge detection threshold to be edge-enhanced are each prepared as a set to enhance contour emphasis. Make the table changeable. In any case, the adjacent pixels to be referenced are 8 pixels,
In “Standard”, edge enhancement gain value: 1.0, offset value: 4.0
At “+1”, edge enhancement gain value: 2.0, offset value: 2.0
In “+2”, edge enhancement gain value: 3.0, offset value: 1.0
In “−1”, the edge enhancement gain value: 0.5, the offset value: 4.0
In “−2 (outline emphasis off)”, edge emphasis gain value: 0.0 and offset value: arbitrary are set.

  When the photographer has reached the desired contour emphasis table, when the set button 808 is pressed, the contour emphasis table at that time is updated by the signal 237h as the setting value of the parameter changed by the contour emphasis processing unit 233. At this time, re-digital development processing is performed using this parameter, and the development result image file 210 is sent to the second memory 212 for recording and displayed on the display unit 211.

  By repeating this operation, when the image of the sharpness desired by the photographer can be confirmed by the images 1702 and 1704 reproduced on the display unit 211, the recording instruction unit 213 can press the recording instruction switch 805 in FIG. The signal 214 is output, and the image file recorded in the second memory 212 is sent to the recording unit 217 and recorded on the recording medium.

  As described above, by changing the setting value of the “standard” parameter of the contour enhancement process and recording the re-developed image, it is possible to obtain an image with sharpness desired by the photographer.

  Here, the cross-keys 809 and 812 are used to set a table that is a target for contour enhancement, change the parameters, and perform redevelopment. However, each time the cross-keys 809 and 812 are pressed once, the change is made. Re-development may be performed using the contour emphasis table, and the resulting images may be displayed sequentially.

  It is also possible to individually switch numerical values for each reference peripheral pixel number for edge emphasis, edge emphasis gain value, and offset value.

  In this way, even when an image having an image quality that does not reflect the photographer's intention is captured due to a change in shooting conditions during shooting, digital development processing can be performed by switching and resetting development parameters. It is also possible to easily check whether the set parameters are optimal, eliminating the need to repeat re-shooting, so that the shooting scene intended by the photographer is not missed and the optimal shooting result is obtained. It can be realized at all times.

  As described above, according to the first and second embodiments, the shooting data from the image sensor is temporarily recorded in the memory, the image of the digital development processing result of the shooting data is displayed, and the digital development is performed. If the various image processing parameters at the time of processing are inappropriate for the captured image, the parameter setting is corrected again, the captured data is read from the memory, and re-digital development processing is performed, and the image quality intended by the photographer By realizing the above with respect to the photographed image, it is possible not to miss the photographing scene intended by the photographer and always realize the optimum photographing result.

(Other embodiments)
In addition, an object of each embodiment is to supply a storage medium (or recording medium) on which a program code of software that realizes the functions of the above-described embodiments is recorded to a system or apparatus, and a computer (or CPU) of the system or apparatus Needless to say, this can also be achieved by reading and executing the program code stored in the storage medium. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention. Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an operating system (OS) running on the computer based on the instruction of the program code. It goes without saying that a case where the function of the above-described embodiment is realized by performing part or all of the actual processing and the processing is included.

  Furthermore, after the program code read from the storage medium is written into a memory provided in a function expansion card inserted into the computer or a function expansion unit connected to the computer, the function is determined based on the instruction of the program code. It goes without saying that the CPU or the like provided in the expansion card or the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.

  When the present invention is applied to the above storage medium, the storage medium stores program codes corresponding to the procedure described above.

Claims (6)

Imaging means for capturing a subject image;
First storage means for storing a second image signal generated by performing a predetermined process on the first image signal output from the imaging means;
Image processing means for generating a third image signal by applying white balance processing to the second image signal based on a predetermined RGB white balance control value;
Display means for displaying the third image signal and the chromaticity coordinate system;
Second storage means for storing the third image signal;
Changing means for changing RGB white balance control values in the image processing means;
Recording instruction means for instructing to read out the third image signal from the second storage means and record it on a recording medium;
In the chromaticity coordinate system, the display means is changed by the chromaticity coordinate point corresponding to the RGB white balance control value used to generate the third image signal, and the second chromaticity coordinate system. And an chromaticity coordinate point corresponding to an RGB white balance control value to be used for white balance processing of the image signal.   The imaging apparatus according to claim 1, wherein the chromaticity coordinate system includes an axis indicating a color temperature direction.   The imaging apparatus according to claim 2, wherein the chromaticity coordinate system includes axes indicating green and magenta directions.   A chromaticity coordinate point corresponding to the RGB white balance control value used for generating the third image signal displayed by the display means is a point set as a white point in the chromaticity coordinate system. The imaging device according to claim 1, wherein the changing unit determines a change amount of the RGB white balance control value in accordance with a user operation amount from the set point. A first storage step of storing, in the first storage means, a second image signal generated by subjecting the first image signal output from the imaging means for capturing the subject image to predetermined processing;
An image processing step of generating a third image signal by performing a white balance process on the second image signal based on a predetermined RGB white balance control value;
Displaying the third image signal and the chromaticity coordinate system on a display means;
A second storage step of storing the third image signal in a second storage means;
A change step of changing the white balance control value of RGB in the image processing step;
A recording instruction step for instructing to read out the third image signal from the second storage means and record it on a recording medium,
In the chromaticity coordinate system, the display step is changed by the chromaticity coordinate point corresponding to the white balance control value of RGB used for generating the third image signal, and the second step. And a chromaticity coordinate point corresponding to an RGB white balance control value to be used for white balance processing of the image signal of the image signal displayed on the display means.   A non-transitory computer-readable storage medium storing a program for causing a computer to execute the control method for an imaging apparatus according to claim 5.

Images