JP2008139709A - Color processing apparatus and method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably achieve faithful color reproduction without being affected by a secular change over the entire part of a display screen of an image display device by performing a color processing in consideration of the intra-surface unevenness and secular change of the luminance and chromaticity of the image display device. <P>SOLUTION: An input section 20 inputs data for profile generation of the image display device 22, luminance distribution information of the display screen, lapse time after turning on of a power source, an image to be displayed on the image display device 22, and its display position information. A profile generating 10 generates the profile of the image display device 22, and generates the corrected profile for color correction of the input image based on the profile, the luminance distribution information, the lapse time, and the display position information. A color matching processing section 11 performs color correction of the input image by using the profile and the corrected profile. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to color correction of an image displayed on an image display device.

  There are various types of image display devices such as cathode ray tube (CRT) displays, liquid crystal displays (LCD), plasma display panels (PDP), front and rear projectors. The color reproduction range (hereinafter referred to as “color gamut”) of these image display devices is different from the color gamut of an image input to the image display device. Therefore, in order to faithfully reproduce the color of the input image on these image display devices, output characteristics (hereinafter referred to as “profile”) of the image display device are acquired. Then, using the profile, the color gamut of the input image is converted to the color gamut of the image display device (hereinafter referred to as “mapping”).

  However, there are cases where a faithful color cannot be reproduced even if mapping is performed using the profile of the image display apparatus. There are two possible causes for this.

  One is the uneven brightness and color in the display screen due to various causes such as uneven light emission of the backlight (LCD), non-uniformity of the display panel (LCD, PDP), and distortion of the lens system (projector). Together, this is called “in-plane unevenness”). As a result, when the profile acquired in the screen center area of the image display device is used, even if the color can be faithfully reproduced in the screen center area, the color is not faithfully reproduced outside the screen center area.

  The other is that the luminance and chromaticity of the image display apparatus fluctuate without being stable over time after the power is turned on (hereinafter referred to as “time-dependent change”). Accordingly, the color gamut during operation of the image display apparatus may be different from the color gamut at the time of profile creation.

  Therefore, as a method of solving the in-plane unevenness, there is generally a method of measuring a whole area in the display screen and acquiring a profile. In addition, there is a method of acquiring in-plane unevenness characteristics of an image display device and correcting in-plane unevenness (for example, Patent Document 1).

  However, it takes an enormous amount of time to create a profile by measuring all the areas in the display screen. In addition, it takes a long time to measure, so that it is easily affected by changes with time.

  A certain color may be out of the color gamut in the center area of the screen and out of the color gamut in areas other than the screen center area. In such a case, as in Patent Document 1, the method of correcting the in-plane unevenness by adjusting the luminance gain of each RGB for each screen area can perform a process of mapping a color outside the color gamut into the color gamut. Therefore, the color balance may be greatly lost.

Japanese Patent Laid-Open No. 2003-143621

  An object of the present invention is to perform color processing in consideration of in-plane unevenness of luminance and chromaticity of an image display device and changes with time.

  The present invention has the following configuration as one means for achieving the above object.

  The color processing according to the present invention inputs profile creation data of an image display device, creates a profile of the image display device from the profile creation data, and inputs brightness distribution information of a display screen of the image display device. , Input an elapsed time after power-on of the image display device, input an image to be displayed on the image display device and display position information of the image, the profile, the luminance distribution information, the elapsed time and the A correction profile for color correction of the image is generated based on display position information, and the image is color-corrected using the profile and the correction profile.

  Also, the profile creation data of the image display device is input, the profile of the image display device is created from the profile creation data, and the image to be displayed on the image display device and the display position information of the image are input. The luminance distribution information of the display screen of the image display device is input within a predetermined time after the input of the image, and the color correction of the image is performed based on the profile, the luminance distribution information, and the display position information. A correction profile is generated, and the image is color-corrected using the profile and the correction profile.

  According to the present invention, it is possible to perform color processing in consideration of in-plane unevenness of luminance and chromaticity of an image display device and changes with time. Accordingly, faithful color reproduction can be stably realized over the entire display screen of the image display device without being affected by changes with time.

  Hereinafter, image processing according to an embodiment of the present invention will be described in detail with reference to the drawings.

[System configuration]
FIG. 1 is a block diagram illustrating a configuration example of an image processing system including the image processing device 21 according to the embodiment.

  The image display device 22 is a CRT, LCD, PDP, front or rear projector, or the like. The colorimeter 23 can measure color information such as XYZ tristimulus values of the object, and supplies profile data and luminance distribution information of the image display device 2 to the image processing device 1.

  The image input device 24 is a digital camera, a digital video camera, or the like, and supplies captured images and videos to the image processing device 21 or stores them in the external storage device 25. The external storage device 25 is a storage device having a large storage capacity capable of storing images and moving images, such as a hard disk drive (HDD) or an optical disk drive.

  The timer 27 monitors the power-on of the image display device 22, and measures an elapsed time after the power is turned on. The local bus 29 is a bus that interconnects the above configurations to enable data communication, and is a serial bus such as USB or IEEE1394, for example.

  The input unit 20 of the image processing device 21 inputs the profile data from the colorimeter 23 and the luminance distribution information from the image input device 24. Further, the elapsed time is input from the timer 27, and an image or video and its display position information are input from the image input device 24, the external storage device 25, or the like. The input data is stored in the profile storage unit 12, the luminance distribution storage unit 14, the elapsed time storage unit 15, the display position storage unit 16, and the input image storage unit 17, respectively. The display position information indicates a display position when a corresponding image or video is displayed on the image display device 22. Further, the display position information is not necessarily designated in advance, and can be set in the image processing device 21 by operating an input device 204 described later.

  The profile creation unit 10 creates a profile of the image display device 22 and a correction profile described later using data stored in the profile storage unit 12, the luminance distribution storage unit 14, the elapsed time storage unit 15, and the display position storage unit 16. To do. Then, the created profile and correction profile are stored in the correction profile storage unit 13.

  The color matching processing unit 11 uses the profile and the correction profile stored in the profile storage unit 12 and the correction profile storage unit 13 corresponding to the image and video stored in the input image storage unit 17 to process the image and video. Perform color matching (color correction). Then, the image and video subjected to the color matching process are stored in the output image storage unit 18.

  The output unit 19 outputs the image or video stored in the output image storage unit 18 to the image display device 22 together with the corresponding display position information stored in the display position storage unit 16. The image display device 22 displays an image or video at a position indicated by the display position information on the display screen.

[Configuration of image processing apparatus]
FIG. 2 is a block diagram illustrating a configuration example of the image processing apparatus 21.

  The CPU 201 uses the RAM 202 as a work memory, controls the entire image processing apparatus 21 via the system bus 209 according to programs stored in the ROM 203 and the HDD 207, and executes various processes including image processing described later. To do. The RAM 202 is used by the CPU 201 as a work area in which a program executed by the CPU 201 is loaded and various data is temporarily stored during control and processing by the CPU 201. The ROM 203 stores a boot program and various data.

  The HDD 207 stores an operating system (OS), various application programs, various data, and the like. The storage areas of the profile storage unit 12, the correction profile storage unit 13, the luminance distribution storage unit 14, the elapsed time storage unit 15, the display position storage unit 16, the input image storage unit 17, and the output image storage unit 18 described above are RAM 202. And assigned to HDD 207.

  The input device 204 is a pointing device such as a keyboard and a mouse for inputting user instructions. The input / output port 206 is an interface with the local bus 29 and corresponds to the input unit 20 and the output unit 19 described above.

  A network interface card (NIC) 205 is an interface with an external network 26 such as a LAN or the Internet. The image processing device 21 can input an image or video supplied from an external server via the external network 26 or store it in the external storage device 25 via the local bus 29.

  Note that the profile creation unit 10 and the color matching processing unit 11 illustrated in FIG. 1 may be configured by software or hardware.

[Image processing]
FIG. 3 is a flowchart showing image processing performed by the image processing apparatus 21, which is executed by the CPU 201.

  First, as will be described in detail later, the CPU 201 inputs profile creation data for the image display device 22. Then, the profile creation unit 10 is controlled to create a profile of the image display device 22 and store it in the profile storage unit 12 (S101). Although details will be described later, the luminance distribution information of the image display device 22 is input and stored in the luminance distribution storage unit 14 (S102). If the profile and luminance distribution information of the image display device 22 are already stored in the profile storage unit 12 and the luminance distribution storage unit 14, the processes in steps S101 and S102 are omitted.

  Next, the CPU 201 inputs an image or video frame to be displayed on the image display device 22 and display position information thereof, and stores them in the input image storage unit 17 and the display position storage unit 16 in association with each other ( S103). Then, the elapsed time after power-on of the image display device 22 is input and stored in the elapsed time storage unit 15 (S104).

  Next, the CPU 201 inputs data of one pixel of an image or video frame (hereinafter referred to as “target pixel”) from the input image storage unit 17 (S105), and the display position information stored in the display position storage unit 16 Based on the above, the display position of the target pixel is calculated (S106). As will be described in detail later, the profile creation unit 10 is controlled to create a correction profile for correcting in-plane unevenness and temporal change for the pixel of interest based on the display position and elapsed time, and the correction profile storage unit 13 (S107).

  Next, as will be described in detail later, the CPU 201 controls the color matching processing unit 11 and uses the profile and the correction profile stored in the profile storage unit 12 and the correction profile storage unit 13 to color the data of the target pixel. A matching process is performed (S108). Then, the data of the pixel of interest subjected to the color matching process is stored in the storage position corresponding to the pixel of interest in the output image storage unit 18 (S109).

  Next, the CPU 201 determines whether or not color matching processing has been performed on all the pixels of the image or video frame to be displayed on the image display device 22 (S110). If there is a pixel that has not undergone color matching processing, the processing returns to step S105, and the processing of steps S106 to S109 is performed on the next pixel of interest. In addition, when the color matching processing for all pixels is completed, the image or video stored in the output image storage unit 18 and the corresponding display position information stored in the display position storage unit 16 are output to the image display device 22 ( S111).

  Next, the CPU 201 determines whether or not it is one image to be displayed on the image display device 22 (S112), and when displaying one image, the process ends here. When a plurality of images or videos are displayed, the process returns to step S103, and the above-described process is performed on the next image or video frame.

[Create profile]
The creation of a profile in step S101 will be described.

  The profile in the first embodiment includes the input signal value input to the image display device 22 and the tristimulus value output (displayed) by the image display device 22 when an arbitrary time has elapsed after the image display device 22 is turned on. Is a look-up table (LUT) showing the relationship of Further, it is assumed that the image display device 22 receives an RGB signal and can display the three primary colors of RGB in 256 gradations.

  The CPU 201 inputs an RGB signal with an arbitrary gradation step to the image display device 22 and causes the image display device 22 to display a color pattern having a plurality of color patches. The operator uses the colorimeter 23 to measure the color patch displayed on the image display device 22, and inputs the tristimulus value of the measurement result to the image processing device. The CPU 201 determines the relationship between the tristimulus value and the RGB value input to the image display device 22 based on the measurement value information added to the measurement value or the measurement order, and associates the RGB value with the tristimulus value. Create a 3D LUT (3DLUT). If this 3DLUT is used, tristimulus values for arbitrary RGB values can be calculated by interpolation. Note that L * a * b * values may be used as colorimetric values instead of tristimulus values.

  Note that if it takes time to measure a color patch in order to acquire a profile, it is affected by changes over time. However, if the number of color patches (the number of samples) is reduced by shortening the measurement time, the accuracy of the interpolation calculation using the profile is lowered. Therefore, it is necessary to reduce the number of samples as long as the accuracy of the interpolation calculation can be maintained. For example, a profile may be created using gamma values of RGB colors instead of 3DLUT. Alternatively, the accuracy of the interpolation calculation may be maintained while reducing the number of samples by using a GOG (gain-offset-gamma) model that estimates the tristimulus values output from the image display device. That is, the profile creation method is not limited to the above as long as desired accuracy of the interpolation calculation can be obtained.

[Obtain luminance distribution]
Next, acquisition of luminance distribution information in step S102 will be described.

  The CPU 201 sequentially inputs RGB signals (R, G, B) = (255, 0, 0), (0, 255, 0), (0, 0, 255) to the image display device 22, Display the color corresponding to the RGB signal on the entire display screen. Then, the image input device 24 is controlled to sequentially photograph the screen of the image display device 22, and an image of the photographing result is input as luminance distribution information. At that time, the elapsed time at the time of shooting is input from the timer 27 and added to the luminance distribution information. It is assumed that the image input device 24 is calibrated so that a luminance value can be output. Accordingly, the image data output from the image input device 24 represents the luminance distribution of each of R, G, and B on the display screen.

  FIG. 4 is a diagram for explaining the luminance distribution information stored in the luminance distribution storage unit 14.

  Reference numeral 601 represents an R luminance distribution information group, reference numeral 602 represents a G luminance distribution information group, and reference numeral 603 represents a B luminance distribution information group. The time axis t corresponds to an elapsed time axis after the image display device 22 is turned on, the y axis corresponds to the y coordinate axis of the display screen, and the x axis corresponds to the x coordinate of the display screen. In other words, the luminance values of RGB at the position (x, y) on the display screen at the elapsed time t are Lr (x, y, t), Lg (x, y, t), Lb (x, y, t) Can be expressed as However, the acquisition timing of the luminance distribution information is discrete, and the luminance value at the elapsed time after the latest acquisition timing is acquired by a prediction calculation. Therefore, the luminance distribution storage unit 14 may store the number of pieces of luminance distribution information necessary for predicting the luminance value.

  The acquired luminance distribution information (captured image) may not be stored in the luminance distribution storage unit 14 as it is. For example, an approximate expression obtained by polynomial approximation of the acquired brightness distribution may be stored in the brightness distribution storage unit 14. That is, it is only necessary to store the luminance distribution information in which the luminance can be calculated by giving the display position (x, y) and the elapsed time t in the luminance distribution storage unit 14.

  Further, if the chromaticity unevenness is caused by the RGB luminance unevenness, the chromaticity unevenness can be corrected by acquiring the RGB luminance distribution information.

[Create correction profile]
Next, creation of a correction profile in step S107 will be described.

When 3DLUT indicating the correspondence between RGB values and tristimulus values is represented by f (R, G, B) ^T , the tristimulus values [XYZ] ^T corresponding to arbitrary RGB values (R, G, B) are expressed by the formula ( It can be calculated as in 1).
┌ ┐
│X│
│Y│ = f (R, G, B) ^T
│X│
└ ┘
┌ ┐ ┌ ┐ ┌ ┐
│Xr│ │Xg│ │Xb│
= │Yr│ ・ r + │Yg│ ・ g + │Yb│ ・ b + f (0,0,0)
│Zr│ │Zg│ │Zb│
└ ┘ └ ┘ └ ┘
┌ ┐┌ ┐
│Xr Xg Xb││r│
= │Yr Yg Yb││g│ + f (0,0,0)… (1)
│Zr Zg Zb││b│
└ ┘└ ┘
Where [Xr Yr Zr] ^T , [Xg Yg Zg] ^T , and [XYZ] ^T are (R, G, B) = (255,0,0), (0,255,0), (0,0,255), respectively Represents the tristimulus value of time
[rgb] ^T represents the mixing ratio of each primary color
T represents a transposed matrix

The mixing ratio [rgb] ^T of primary colors can be expressed by the formula (2).
┌ ┐
│r│
│g│ = A ^-1 {f (R, G, B) ^T -f (0,0,0) ^T }… (2)
│b│
└ ┘
Where ┌ ┐
│Xr Xg Xb│
A = │Yr Yg Yb│
│Zr Zg Zb│
└ ┘

The tristimulus value [XYZ] ^{T at the} display position (x, y) and the elapsed time t is the luminance distribution Lr = Lr (x, y, t), Lg = Lg (x, y, t), Lb = Lb ( Assuming that x, y, t), the correction profile g (R, G, B, x, y, t) ^T is used to calculate with the equation (3).
┌ ┐
│X│
│Y│ = g (R, G, B, x, y, z, t) ^T
│Z│
└ ┘
┌ ┐ ┌ ┐ ┌ ┐
│Xr│ │Xg│ │Xb│
= │Yr│ ・ r '+ │Yg│ ・ g' + │Yb│ ・ b '… (3)
│Zr│ │Zg│ │Zb│
└ ┘ └ ┘ └ ┘
Where r '= r ・ Lr / Yr = r ・ Lr (x, y, t) / Yr
g '= g ・ Lg / Yg = g ・ Lg (x, y, t) / Yg
b '= b ・ Lb / Yb = b ・ Lb (x, y, t) / Yb
┌ ┐ ┌ ┐
│X│ │r│
∴│Y│ = A [1 / Yr 1 / Yg 1 / Yb] │g│ [Lr Lg Lb]
│Z│ │b│
└ ┘ └ ┘
= A [1 / Yr 1 / Yg 1 / Yb] A ^-1 {f (R, G, B) ^T -f (0,0,0) ^T } [Lr Lg Lb]… (4)

In step S108, the RGB mixing ratio [rgb] ^T for reproducing the tristimulus values corresponding to the RGB data of the target pixel obtained from the profile is calculated using the correction profile shown in the equation (4). Then, the RGB data corresponding to the RGB mixing ratio is used as the pixel-of-interest data after the color matching process.

[Color matching processing]
Next, the color matching process in step S108 will be described.

Using the profile g (R, G, B, x, y, t) ^T that corrects the in-plane unevenness and change over time, the pixel data (R, G, B) of the target pixel is input to the image display device 22. Convert to signal value. Here, if the data of the pixel of interest exists outside the color gamut of the image display device 22, it is mapped within the color gamut of the image display device 22. Many mapping methods have been proposed, and any method may be used. For example, a line connecting a color outside the color gamut with a color within the color gamut of the image display device 22 (usually a gray color with a brightness value of 50%) and a color outside the color gamut is drawn, Map out-of-range colors. Of course, the mapping method is not limited to this, and a method of mapping a color outside the color gamut to a color having the smallest color difference among the colors within the color gamut of the image display device 22 may be used.

  In this manner, based on the profile of the image display device 22, luminance distribution information, elapsed time, and display position, a correction profile for correcting in-plane unevenness and temporal change is created to correct an image or video. Accordingly, faithful color reproduction can be stably performed on the entire display screen of the image display device 22 without being affected by changes with time.

  The image processing according to the second embodiment of the present invention will be described below. Note that the same reference numerals in the second embodiment denote the same parts as in the first embodiment, and a detailed description thereof will be omitted.

[System configuration]
FIG. 5 is a block diagram illustrating a configuration example of an image processing system including the image processing device 21 according to the second embodiment. The difference from the image processing device 21 according to the first embodiment illustrated in FIG. There is no point.

[Image processing]
FIG. 6 is a flowchart showing image processing by the image processing apparatus 21, which is executed by the CPU 201.

  First, as described above, the CPU 201 inputs profile data for the image display device 22, creates a profile for the image display device 22, and stores the profile in the profile storage unit 12 (S101). If the profile of the image display device 22 is already stored in the profile storage unit 12, the process of step S101 is omitted.

  Next, as described above, the CPU 201 inputs an image or video frame to be displayed on the image display device 22 and its display position information, and associates them with the input image storage unit 17 and the display position storage unit. It stores in 16 (S103). Subsequently, as described above, the luminance distribution information of the image display device 22 is input and stored in the luminance distribution storage unit 14 (S201).

  Next, the CPU 201 inputs the data of the target pixel (S105), calculates the display position (S106), creates a correction profile (S202), color matching processing (S108), A series of processing of data storage (S109) is executed. However, the creation of the correction profile (S202) differs from the first embodiment in that the correction profile is created based on the display position without using the elapsed time.

  Next, as in the first embodiment, the CPU 201 repeats steps S105 to S109 until color matching processing is performed on all pixels of the image or video frame to be displayed on the image display device 22 based on the determination in step S110. When the color matching processing for all pixels is completed, an image or video and display position information are output (S111), and it is determined whether or not the image displayed on the image display device 22 is a single image (S112). If one image is displayed, the process ends. If a plurality of images or videos are displayed, the process returns to step S103. Then, the next image or video frame input (S103) and luminance distribution information input (S201) are repeatedly read, and the above-described processing is performed on the next image or video frame.

  For example, video often has a frame rate of 10 fps to 30 fps. It is considered that it is not necessary to acquire luminance distribution information for each frame when displaying such a video. Of course, even when a plurality of images are continuously displayed, it is considered unnecessary to acquire the luminance distribution information at short time intervals. Therefore, for example, new luminance distribution information may be acquired at a predetermined interval every several tens of images or several tens of frames (or several fields) or before a predetermined time elapses. In the case of the second embodiment, since it is not necessary to predict a change with time, the luminance distribution storage unit 16 may store the luminance distribution information for one measurement.

  As described above, in the second embodiment, the luminance distribution information is acquired immediately before displaying an image or video frame on the image display device 22. That is, a luminance distribution including a change with time is acquired. Therefore, even when the geometric conditions such as the display angle and the display size are indefinite and the luminance distribution information cannot be acquired in advance like a projector, a correction profile that corrects in-plane unevenness and temporal change can be created.

[Create correction profile]
Next, creation of a correction profile in step S202 will be described.

In the second embodiment, since the luminance distribution information is acquired immediately before or near the time when the image or video frame is displayed, the luminance distribution including the temporal change is acquired. Tristimulus values [XYZ] ^{T at the} display position (x, y) are corrected when the luminance distribution is Lr = Lr (x, y), Lg = Lg (x, y), Lb = Lb (x, y) Using the profile g (R, G, B, x, y) ^T , it is calculated by the equation (5).
┌ ┐
│X│
│Y│ = g (R, G, B, x, y, z) ^T
│Z│
└ ┘
┌ ┐
│r│
= A [1 / Yr 1 / Yg 1 / Yb] │g│ [Lr Lg Lb]
│b│
└ ┘
= A [1 / Yr 1 / Yg 1 / Yb] A ^-1 {f (R, G, B) ^T -f (0,0,0) ^T } [Lr Lg Lb]… (5)

[Other embodiments]
Note that the present invention can be applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, and a printer), and a device (for example, a copying machine and a facsimile device) including a single device. You may apply to.

  Another object of the present invention is to supply a storage medium (recording medium) that records software for realizing the functions of the above-described embodiments to a system or apparatus, and a computer (CPU or MPU) of the system or apparatus executes the software. Is also achieved. In this case, the software itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the software constitutes the present invention.

  In addition, the above functions are not only realized by the execution of the software, but an operating system (OS) running on a computer performs part or all of the actual processing according to instructions of the software, and thereby the above functions This includes the case where is realized.

  In addition, the software is written in a function expansion card or unit memory connected to the computer, and the CPU of the card or unit performs part or all of the actual processing according to instructions of the software, thereby This includes the case where is realized.

  When the present invention is applied to the storage medium, the storage medium stores software corresponding to the flowchart described above.

FIG. 2 is a block diagram illustrating a configuration example of an image processing system including the image processing apparatus according to the embodiment. Block diagram showing a configuration example of an image processing device, A flowchart showing image processing by the image processing apparatus; The figure explaining the luminance distribution information memorize | stored in a luminance distribution memory | storage part, Block diagram showing a configuration example of an image processing system including an image processing apparatus of Example 2, It is a flowchart which shows the image processing by an image processing apparatus.

Claims (9)

Data input means for inputting data for profile creation of the image display device;
Luminance distribution input means for inputting luminance distribution information of a display screen of the image display device;
Time input means for inputting an elapsed time after power-on of the image display device;
An image to be displayed on the image display device; and image input means for inputting display position information of the image;
Generating means for generating a profile of the image display device from the profile generation data, and generating a correction profile for color correction of the image based on the profile, the luminance distribution information, the elapsed time, and the display position information; ,
A color processing apparatus comprising: correction means for color correcting the image using the profile and the correction profile.   2. The color processing apparatus according to claim 1, wherein the generation unit creates the correction profile for each pixel of the image, and the correction unit performs color correction for each pixel of the image.   3. The correction profile is generated by predicting the luminance of the display position of the pixel to be corrected based on the luminance distribution information, the elapsed time, and the display position information. The color processing apparatus described in 1.   4. The color processing apparatus according to claim 1, wherein the correction profile is a profile that corrects unevenness in luminance and chromaticity in the display screen and changes over time. Data input means for inputting data for profile creation of the image display device;
An image to be displayed on the image display device; and image input means for inputting display position information of the image;
A luminance distribution input means for inputting luminance distribution information of the display screen of the image display device within a predetermined time after the input of the image;
Generating means for creating a profile of the image display device from the profile creation data, and generating a correction profile for color correction of the image based on the profile, the luminance distribution information and the display position information;
A color processing apparatus comprising: correction means for color correcting the image using the profile and the correction profile. Enter the profile creation data for the image display device,
Create a profile of the image display device from the profile creation data,
Input luminance distribution information of the display screen of the image display device,
Enter the elapsed time after turning on the image display device,
Input an image to be displayed on the image display device and display position information of the image,
Based on the profile, the luminance distribution information, the elapsed time, and the display position information, a correction profile for color correction of the image is generated,
A color processing method, wherein the image is color-corrected using the profile and the correction profile. Enter the profile creation data for the image display device,
Create a profile of the image display device from the profile creation data,
Input an image to be displayed on the image display device and display position information of the image,
Within a predetermined time after the input of the image, the luminance distribution information of the display screen of the image display device is input,
Based on the profile, the luminance distribution information and the display position information, a correction profile for color correction of the image is generated,
A color processing method, wherein the image is color-corrected using the profile and the correction profile.   8. A computer program for controlling the image processing apparatus to realize the color processing according to claim 6 or 7.   9. A computer-readable recording medium on which the computer program according to claim 8 is recorded.

Images