JP2007019713A - Color calibration processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color calibration processor capable of performing color calibration processing fast and reducing the amount of information prepared and held previously for the color calibration processing. <P>SOLUTION: The color calibration processor 1 is equipped with a color set acquisition section 2, an area detection section 4, and a calibration processing section 5. The color set acquisition section 2 acquires a color set including a source color and a reference color from an image obtained by an imaging apparatus, the area detection section 4 detects the object area of color calibration having color information similar to the source color, and the calibration processing section 5 calibrates the color information of the object area of color calibration with color information of the reference color. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a color calibration processing device that performs color calibration processing on images obtained from a plurality of imaging devices.

  In a person tracking monitoring system that tracks a person's action using a camera image, the image obtained from the camera is subjected to various image processing by a computer, thereby tracking the action of the person captured by the camera. In such a person tracking monitoring system, a wide monitoring area can be covered by using a plurality of cameras. However, these cameras are arranged at different points, and the illumination conditions of the areas (monitoring areas) photographed by the cameras are also different. As a result, when the same person is photographed with these cameras, the color information of the person's image differs from camera to camera, making it difficult to perform image processing for tracking the person based on the color information. Occurs.

Therefore, conventionally, a method of calibrating color information of each camera image is known in order to maintain color constancy between a plurality of camera images. For example, as a color calibration method based on correlation matrix analysis of color histogram and dynamic programming, a distance metric and a model function for evaluating the radiation component inside the camera are used. A method for deriving a model function is known (for example, see Non-Patent Document 1). Further, as a method of performing color calibration so that the color characteristics of one image match the color characteristics of another image, a method of converting a color space using a color space called Lαβ is known (for example, non-patent document). 2). In addition, as a color calibration method for estimating the lighting conditions of a place photographed by each camera, a set of linear maps is obtained in advance by calculation, and one pair is selected from the set of linear maps. A method is known in which the illumination condition is estimated and the color of each image is calibrated (color constancy is maintained) (see, for example, Non-Patent Document 3).
FM Porikli, “Inter-Camera Color Calibration by Correlation Model Function”, [online], Mitsubishi Electric Research Laboratories, February 2004, [May 23, 2005 search], Internet <URL: http: // www. merl.com/reports/docs/TR2003-103.pdf> E. Reinhard, 3 others, “Color Transfer between Images”, IEEE Computer Graphics and Applications, (USA), University of Utah, 2001, vol. 21, no. 5, p.34-41 DA Forsyth, “A Novel Algorithm for Color Constancy”, International Journal of Computer Vision (UK), Oxford University, August 1990, Volume 5, Issue 1, p. 5-36

  However, in the conventional image color calibration method, since a model function for performing color calibration processing is derived or color space conversion processing is performed, the calculation is very complicated and the calculation amount is very large. For this reason, there is a problem that it takes time to perform arithmetic processing by a computer and it is difficult to perform image processing for color calibration in real time. In addition, the conventional image color calibration method requires a lot of prior work such as preparing a linear map for estimating the illumination condition in advance, and in addition, a large amount of information prepared in advance is required. There was a problem that it was necessary to retain the color calibration processing.

  The present invention has been made to solve the above-described conventional problems, and does not require complicated calculations, can speed up the color calibration process, and does not require a lot of preparatory work. It is an object of the present invention to provide a color proofing processing apparatus that can reduce the amount of information prepared and held in advance for proofing processing.

  The color calibration processing apparatus of the present invention obtains at least one color set including a source color before calibration of each image and a reference color for calibration from a plurality of images obtained by a plurality of imaging devices. An area detection unit for detecting a color calibration target area having color information satisfying a predetermined similarity condition with respect to a source color corresponding to each image from each of the plurality of images; and a color calibration target of the plurality of images It has a configuration including calibration processing means for calibrating the color information of the area to the color information of the reference color.

  With this configuration, the color set acquisition unit acquires a color set including a source color and a reference color from an image obtained by the imaging apparatus. As a result, the amount of information prepared and held in advance for color proofing processing can be reduced. The area detecting unit detects a color calibration target area having color information similar to the source color, and the calibration processing unit calibrates the color information of the color calibration target area to the color information of the reference color. This eliminates the need for complicated calculations as in the prior art, and can speed up the color proofing process.

  In the color calibration processing apparatus of the present invention, the color set acquisition unit acquires the color set from color information of a common object in each image.

  With this configuration, the color set acquisition unit acquires the color set from the color information of the common object. Here, the common object refers to the same subject that has been imaged, and the original color information (color information that the subject originally has) of the common object is the same. Therefore, by acquiring the color set from the color information of the common object, the reliability of the acquired color information of the color set is improved.

  In the color proofing processing apparatus of the present invention, the color set acquisition unit includes an object information storage unit that stores object information of the common object.

  With this configuration, the color set acquisition unit determines the common object based on the object information stored in the object information storage unit. For example, based on object information such as shape information and height information of the common object, it is determined whether or not the captured subjects are the same. Thereby, the accuracy of selecting the common object is improved, and the reliability of the color information of the acquired color set is improved.

  In the color calibration processing apparatus of the present invention, the reference color of the color set is set to any one of the source colors corresponding to the images.

  With this configuration, any one of the plurality of source colors of the color set is used as a reference color for the color set. As a result, the amount of information prepared and held in advance for color proofing processing can be reduced.

  Alternatively, in the color calibration processing device of the present invention, the color information of the reference color of the color set is set to an average value of the color information of the source color.

  With this configuration, the average value of the color information of a plurality of source colors of the color set is used as the color information of the reference color of the color set. This also reduces the amount of information that is prepared and stored in advance for the color proofing process.

  In the color calibration processing apparatus of the present invention, the color set acquisition unit includes an area specifying unit for specifying a color set acquisition area for acquiring the color set from each image.

  With this configuration, the color setting acquisition area is specified by the area specifying means, and the color set acquisition means acquires the color set from the color set acquisition area. Thereby, a color set can be acquired from an appropriate region of the image, and the reliability of the color information of the acquired color set is improved.

  In the color calibration processing apparatus of the present invention, the area designating unit has a configuration in which the entire image is designated as the color set acquisition area, and the source color corresponding to each image in the color set is: The average value of the color information of the entire image is set.

  With this configuration, the entire image is designated as the color set acquisition region by the region designating means, and the average value of the color information of the entire image is obtained as the source color of the color set. Thereby, the average value (gray scale) of the color information of the entire image is used as the source color of the color set. Therefore, the number of source color options in the color set is increased, and the amount of information prepared and held in advance for color proofing processing can be reduced.

  In the color calibration processing apparatus of the present invention, the calibration processing means subtracts color information of a source color corresponding to each image from color information of a color calibration target area of each image, and color information of the reference color Is added to calibrate the color information of the color calibration target area.

  With this configuration, when the calibration processing unit calibrates the color information of the color calibration target area, the color information of the source color is subtracted from the color information of the color calibration target area, and the color information of the reference color is added thereto. In other words, the calibration processing means calculates the difference between the source color of the color set and the reference color, and adds the difference to the color calibration target area within the predetermined similarity range from the source color, thereby performing color calibration. Calibrate the color information of the target area. This eliminates the need for complicated calculations as in the prior art, and can speed up the color proofing process.

  In the present invention, by providing the color set acquisition means, the area detection means, and the calibration processing means, it is not necessary to perform complicated calculations, the color calibration processing can be speeded up, and a lot of preparation work is required. In this case, it is possible to provide a color proofing processing apparatus having an effect that the amount of information prepared and held in advance for the color proofing processing can be reduced.

  Hereinafter, a color calibration processing apparatus according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a person who monitors a predetermined area (monitoring area) using two cameras, performs image processing on two images captured by the cameras, and moves between the two images. The color calibration processing apparatus 1 used in the person tracking monitoring system that tracks and monitors the behavior of the (person object to be monitored) will be described as an example (see FIG. 5).

  In the present embodiment, the two cameras are referred to as camera A and camera B. An image captured by the camera A is referred to as a source image A, and an image captured by the camera B is referred to as a source image B. Camera A and camera B are arranged at positions separated from each other, and the shooting areas of camera A and camera B partially overlap. The person to be monitored moves across the source image A of the camera A and the source image B of the camera B (see FIG. 5).

  A block diagram of the color calibration processing apparatus 1 of the present embodiment is shown in FIG. In FIG. 1, a color calibration processing apparatus 1 includes a color set acquisition unit 2 that acquires a plurality of color sets from two images (source image A and source image B) obtained by two cameras (camera A and camera B). A color set storage unit 3 for storing a plurality of acquired color sets, and a color calibration target area having color information satisfying a predetermined similarity condition for the source color (source color A or source color B) corresponding to each image Is detected from each of the two images, and a calibration processing unit 5 that calibrates the color information of the color calibration target areas of the two images to the color information of the reference color.

  The color set includes source colors (source color A and source color B) before calibration for each of two images (source image A and source image B) and a reference color for calibration. The reference color of the color set is a color that serves as a reference for proofreading the source color. In the present embodiment, the reference color of the color set is set to be the same as one of the two source colors corresponding to the two images. Here, the reference color of the color set is set to the source color B corresponding to the source image B (see FIG. 6). That is, the source color B is treated as a reference color as it is, and the source color A is calibrated with reference to the source color B (reference color). The block diagram in FIG. 1 is a configuration diagram in the case where the source image B is used as a reference image and the color calibration processing is performed on the source image A. However, in the case where the color calibration processing is performed on the source image B, the source image A And the input signal (image signal) of the source image B are switched.

  FIG. 2 is a block diagram showing a main configuration of the color set acquisition unit 2 shown in FIG. As shown in FIG. 2, the color set acquisition unit 2 includes an area specifying unit 6 for a user to specify a color set acquisition area for acquiring a color set from two images (source image A and source image B). An object information storage unit 8 that stores object information of a common object (a common subject reflected in both images), and a color set from color information of the common object in the color set acquisition area based on the object information of the common object. And a color set generation unit 7 for generation.

  For example, in the area designating unit 6, a predetermined area of a common object (for example, a person's head area, a tree leaf area, a road non-paved area, etc.) in a portion where two images overlap is subjected to image trimming processing by the user. Etc. (see FIG. 5). The area specified by the area specifying unit 6 is output to the color set generating unit 7. The object information storage unit 8 stores object information of common objects (for example, area information, color information, average color information, histogram information, shape information, height information, parts information, etc.). . In the present embodiment, the object information of these common objects is extracted by image processing from the common object portion of the image (source image A or source image B) obtained by the camera. The object information stored in the object information storage unit 8 is output to the color set generation unit 7.

  Then, the color set generation unit 7 specifies a common object for obtaining a color set based on the region information and color information of the common object, and the color of the common object in the region designated by the region designation unit 6 Generate a color set from the information. As described above, the color set acquisition unit 2 is configured to acquire a color set from the color information of the common object in a portion where two images overlap (see FIGS. 5 and 6).

  A specific example of the color set acquired in this way is shown in FIG. As shown in the second to fourth stages in the table of FIG. 6, in the present embodiment, for example, a red color set (red 1, red 2, red 2 from the head region of a person wearing a red hat). ) Is acquired. Also, a green color set (green 2, green 4, green 4) is acquired from the leaf area of the tree. Furthermore, a brown color set (brown 6, brown 8, brown 8) is acquired from the unpaved area (soil area) of the road.

  Further, the area designating unit 6 is configured so that the entire image (source image A or source image B) can be designated as a color set acquisition area. As shown at the bottom of the table in FIG. 6, the source colors (source color A and source color B) of the color set acquired by the color set acquisition unit 2 are average values (that is, color information) of all the images (that is, , Gray scale color information corresponding to luminance). In this case, a gray scale color set (gray 10, gray 20, gray 20) is acquired from the average value of the color information of the entire image. Also in this case, the reference color of the color set is set to be the same as the source color B.

  In the color set storage unit 3, the color set acquired by the color set acquisition unit 2 is input and stored. The color set stored in the color set storage unit 3 is output to the region detection unit 4 and used for detection of the color calibration target region, and is output to the color calibration processing unit 5 to output color information of the color calibration target region. Used for calibration processing.

The area detection unit 4 performs color calibration having color information satisfying a predetermined similarity condition from each image (source image A or source image B) with respect to the source color (source color A or source color B) of the color set. A target area is detected. Here, an area satisfying the following two conditional expressions, that is, the absolute value of the difference between the hue H of the area and the hue Hs of the source color is smaller than a predetermined threshold hue difference ΔH, and the area. A region where the absolute value of the difference between the saturation S of the source color and the saturation Ss of the source color is smaller than a predetermined threshold saturation difference ΔS is detected as a color calibration target region having color information that is the same as or similar to the source color. The
0 ≦ | H−Hs | <ΔH
0 ≦ | S−Ss | <ΔS

The calibration processing unit 5 subtracts the color information of the source color of each image from the color information of the color calibration target area of each image and adds the color information of the reference color by using the following formula, thereby performing color calibration. Calibration processing of the color information of the target area is performed.
PRED = (pred−rv1) + rv2
PGREEN = (pgreen−gv1) + gv2
PBLUE = (pblue−bv1) + bv2
Here, (pred, pgreen, pblue) are RGB values before calibration of the color calibration target area, and (PRED, PGREEN, PBLUE) are RGB values after color calibration processing. (Rv1, gv1, bv1) is the RGB value of the source color (source color A or source color B), and (rv2, gv2, bv2) is the RGB value of the reference color.

  That is, the calibration processing unit 5 according to the present embodiment calculates a difference between the source color and the reference color of the color set, and adds the difference to the color calibration target area within a predetermined similar range from the source color. As a result, calibration is performed to replace the color information of the color calibration target area so that the color information is shifted by the difference.

  In the above-described calibration processing, replacement is performed while maintaining a similar state (that is, a color difference between the source color and the similar portion) in the color calibration target region, and this calibration processing can be said to be shift replacement. In addition, the calibration processing unit 5 may calibrate the color information of the color calibration target area by replacing the color calibration target area within a predetermined similar range from the source color with the value of the reference color itself. In this case, the calibration processing unit 5 performs, for example, a calibration process for replacing the RGB values (pred, pgreen, pblue) before calibration in the color calibration target area with the RGB values (rv2, gv2, bv2) of the reference color.

  The operation of the color calibration processing apparatus 1 configured as described above will be described with reference to FIGS.

  FIG. 3 is a flowchart showing the overall operation of the color calibration processing apparatus 1. When color calibration processing is performed on two images (source image A and source image B) captured by two cameras (camera A and camera B) using the color calibration processing apparatus 1 of the present embodiment, First, the color set acquisition unit 2 acquires a plurality of color sets from overlapping portions of two images, and stores the total number n of acquired color sets as a variable (S1).

  Next, it is determined whether or not the number n of acquired color sets is 0 (S2). If the number n of color sets is determined to be larger than 0 as a result of the determination processing of the number n of color sets, one color set is selected from the color sets, and the current number n of color sets is set to n−1. (S3).

  Then, the area detection unit 4 has color information satisfying a predetermined similarity condition with respect to the source color (source color A or source color B) of the color set from each image (source image A or source image B). A color calibration target area is detected (S4).

  Here, the color calibration target area detection process (S4) will be described in detail. FIG. 4 is a flowchart showing the operation of the color calibration target area detection process. When performing the color calibration target area detection process, first, the entire image is divided into N × N block areas, and the total number A (= N × N) of block areas is stored as a variable (S41).

  Next, among the source colors (source color A or source color B) of the selected color set, a reading process of a source color (for example, source color A) corresponding to an image (for example, source image A) to be color calibrated is performed. (S42).

  Thereafter, one block area is selected from the block areas divided into N × N, and the current block area number A is set to A-1 (S43).

  Then, the hue H and the saturation S are calculated from the color information of the block area (S44). After that, the difference between the hue H of the block area and the hue Hs of the source color is compared with a predetermined threshold hue difference ΔH, and the difference between the saturation S of the block area and the saturation Ss of the source color Then, a similarity determination process between the hue H and the saturation S is performed by comparing the predetermined threshold saturation difference ΔS (S45). Specifically, the absolute value of the difference between the hue H of the block area and the hue Hs of the source color is smaller than a predetermined threshold hue difference ΔH, and the saturation S of the block area and the saturation of the source color. When the absolute value of the difference from Ss is smaller than a predetermined threshold saturation difference ΔS, it is determined that the color information of the block area is the same as or similar to the color information of the source color.

  As a result of the similarity determination process (S45), when it is determined that the color information of the block area is the same as or similar to the color information of the source color, the block area is set as a color calibration target area (S46). On the other hand, when it is determined that the color information of the block area is not similar (dissimilar) to the color information of the source color, the block area is not set as a color calibration target area.

  Then, it is determined whether or not the current block area number A is 0 (S47). If the current block area number A is larger than 0, one block area is selected from the block areas. The process returns to the selection process (S43). On the other hand, if the number A of current block areas is 0 as a result of the determination process (S47), the color calibration target area detection process (S4) is terminated.

  After performing the color calibration target area detection process (S4) as described above, the calibration processing unit 5 performs the color information calibration process for the color calibration target area (S5). Specifically, the color information (rv1, gv1, bv1) of the source color of each image is subtracted from the color information (pred, pgreen, pblue) of the color calibration target area, and the color information (rv2, By adding (gv2, bv2), the color information (PRED, PGREEN, PBLUE) after the color calibration processing is calculated, and the color information of the color calibration target area is calibrated.

  When the color information proofreading process for one selected color set is completed in this way, a determination process is performed again as to whether or not the current number n of color sets is 0 (S2). The above processing is repeated until the current number n of color sets becomes zero.

  Then, as a result of the determination process (S2) of the current number n of color sets, if the number of color sets is 0, the user selects whether to use the gray scale (S6).

  If the user selects not to use the grayscale, the color proofing process ends. On the other hand, when the user selects to use the gray scale, the entire image is set as the color set acquisition region by the region specifying unit 6 of the color set acquisition unit 2 (S7). Then, the color set generation unit 7 of the color set acquisition unit 2 acquires a grayscale color set from the entire image (S8).

  Then, the entire image is set as a color calibration target region by the region detection unit 4 (S9), and the gray scale color information of the color calibration target region of the entire image is calibrated by the color calibration processing unit 5 (S10). All color proofing processes are completed.

  The image subjected to color calibration processing (color calibrated image) as described above is output to the tracking monitoring processing unit of the person tracking monitoring system, and the tracking monitoring processing unit based on the color information of the image Image processing for tracking monitoring is performed.

  According to the color calibration processing apparatus 1 of the embodiment of the present invention, the color set acquisition unit 2 is obtained by the imaging device by providing the color set acquisition unit 2, the area detection unit 4, and the calibration processing unit 5. A color set including a source color and a reference color is obtained from the generated image. As a result, the amount of information prepared and held in advance for color proofing processing can be reduced. The area detection unit 4 detects a color calibration target area having color information similar to the source color, and the calibration processing unit 5 calibrates the color information of the color calibration target area to the color information of the reference color. This eliminates the need for complicated calculations as in the prior art, and can speed up the color proofing process. Accordingly, color calibration image processing can be performed in real time.

  In the color calibration processing apparatus 1 of the present embodiment, the color set acquisition unit 2 acquires a color set from the color information of the common object. Here, the common object refers to the same subject (for example, a person, a tree, a road, etc.) captured in a portion where images overlap, and the original color information (color information inherent to the subject) of the common object is The same thing. Therefore, by acquiring the color set from the color information of the common object, the reliability of the acquired color information of the color set is improved.

  In the color calibration processing apparatus 1 of the present embodiment, the color set acquisition unit 2 includes the object information storage unit 8, so that the color set acquisition is performed based on the object information stored in the object information storage unit 8. Part 2 determines a common object. For example, based on the object information such as the shape information and height information of the common object, a determination is made as to whether or not the subjects captured in the overlapping portions of the images are the same. Thereby, the accuracy of selecting the common object is improved, and the reliability of the color information of the acquired color set is improved.

  Further, in the color calibration processing apparatus 1 of the present embodiment, any one source color among a plurality of source colors of the color set is used as a reference color of the color set. As a result, the amount of information prepared and held in advance for color proofing processing can be reduced.

  In the color calibration processing apparatus 1 of the present embodiment, since the color set acquisition unit 2 includes the area specifying unit 6, the area specifying unit 6 specifies a color set acquisition area, and the color set acquisition area The color set acquisition unit 2 acquires a color set. Thereby, a color set can be acquired from an appropriate region of the image, and the reliability of the color information of the acquired color set is improved.

  In the color calibration processing apparatus 1 according to the present embodiment, the entire image is designated as the color set acquisition region by the region designating unit 6, and the average value of the color information of the entire image is obtained as the source color of the color set. Thereby, the average value (gray scale) of the color information of the entire image is used as the source color of the color set. Therefore, the number of source color options in the color set is increased, and the amount of information prepared and held in advance for color proofing processing can be reduced.

  Further, in the color calibration processing apparatus 1 of the present embodiment, when the calibration processing unit 5 calibrates the color information of the color calibration target area, the color information of the source color is subtracted from the color information of the color calibration target area. The color information of the reference color is added. In other words, the calibration processing unit 5 calculates the difference between the source color of the color set and the reference color, and adds the difference to the color calibration target area within the predetermined similarity range from the source color, thereby obtaining the color. Calibrate the color information of the calibration target area. This eliminates the need for complicated calculations as in the prior art, and can speed up the color proofing process.

  The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.

  For example, in the above description, the example in which the reference color of the color set is set to any one of the source colors has been described. In addition, as shown in FIG. 7, the color information of the reference color of the color set is Even if it is set to the average value of the color information of the source color, it can be similarly implemented. In this case, the average value of the color information of a plurality of source colors of the color set is used as the color information of the reference color of the color set. As a result, the amount of information prepared and held in advance for color proofing processing can be reduced.

  In the above description, the case where there are two cameras serving as imaging devices has been described as an example, but in addition, even when there are three or more imaging devices (camera A, camera B, camera C,...). It can be implemented similarly. In that case, the source colors (source color A, source color B, source color C,...) Of the color set are images of the respective imaging devices (source image A, source image B, source image C,. ...) are set respectively. In the example of the color set shown in FIG. 8, the reference color of the color set is set to be the same as the source color B.

  In the above description, the calibration processing unit 5 subtracts the color information of the source color of each image from the color information of the color calibration target area of each image, and adds the color information of the reference color, thereby performing color calibration. The example in which the calibration process for shifting and replacing the color information of the target area has been described. In addition, the calibration processing unit 5 sets the color calibration target area within the predetermined similar range from the source color to the value of the reference color itself. The color information of the color calibration target area may be calibrated by replacing the color information.

  In the above description, the example in which the object information of the common object is extracted from the image obtained by the imaging device has been described. However, the object information transmission in which the object information of the common object transmits the object information specified by the user is also described. Even if it is transmitted from a device and the object information storage unit 8 receives the object information from the device, it can be similarly implemented. Further, the object information of the common object may be prepared in advance in another device such as a database, and can be similarly implemented even when the object information storage unit 8 receives the object information of the common object from the device. .

  In the above description, the arrangement of the imaging devices has been described with a configuration in which images overlap, but other arrangements of imaging devices in which images do not overlap may be used. In this case, a person who moves in the imaging area of a plurality of imaging devices can be recognized as a common object based on object information such as shape information and height information of the person.

  As described above, the color calibration processing apparatus according to the present invention can speed up the color calibration processing and can reduce the amount of information prepared and held in advance for the color calibration processing. It has an effect and is useful as a color calibration processing device that performs color calibration processing on images obtained from a plurality of imaging devices.

The block diagram of the color proofreading processing apparatus of embodiment of this invention The block diagram of the color proofreading processing apparatus of embodiment of this invention FIG. 3 is a flowchart for explaining the operation of the color calibration processing apparatus according to the embodiment of the present invention. Flow chart for explaining operation of region detection processing in the embodiment of the present invention Explanatory drawing which shows the camera image in embodiment of this invention Table of color sets in the embodiment of the present invention Table of color sets in other embodiments of the present invention Table of color sets in yet another embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Color calibration processing apparatus 2 Color set acquisition part 3 Color set storage part 4 Area | region detection part 5 Calibration processing part 6 Area | region designation | designated part 7 Color set production | generation part 8 Object information storage part

Claims (8)

Color set acquisition means for acquiring at least one color set including a source color before calibration of each image and a reference color for calibration from a plurality of images obtained by a plurality of imaging devices;
A region detecting means for detecting a color calibration target region having color information satisfying a predetermined similarity condition with respect to a source color corresponding to each image from each of the plurality of images;
A color calibration processing apparatus, comprising: calibration processing means for calibrating color information of color calibration target areas of the plurality of images to color information of a reference color.   The color calibration processing apparatus according to claim 1, wherein the color set acquisition unit acquires the color set from color information of a common object in each image.   The color calibration processing apparatus according to claim 2, wherein the color set acquisition unit includes an object information storage unit that stores object information of the common object.   4. The color calibration processing apparatus according to claim 1, wherein a reference color of the color set is set to any one of the source colors corresponding to the respective images.   4. The color calibration processing apparatus according to claim 1, wherein color information of a reference color of the color set is set to an average value of color information of the source color.   The said color set acquisition means is provided with the area | region designation | designated part which designates the color set acquisition area | region which acquires the said color set from each said image, The Claim 1 thru | or 5 characterized by the above-mentioned. Color proofing processing device. The area designating unit designates the entire image as the color set acquisition area,
The color calibration processing apparatus according to claim 6, wherein the source color corresponding to each image of the color set is set to an average value of color information of the entire image. The calibration processing means subtracts the color information of the source color corresponding to each image from the color information of the color calibration target region of each image, and adds the color information of the reference color to thereby add the color calibration target region. 8. The color calibration processing apparatus according to claim 1, wherein the color information is calibrated.

Images