JP3717401B2 - Image color correction method in image transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an image color correction method which is intended for image transmission between a pair of computer image processing systems, and which solves the problem of image color mismatch occurring at this time.
[0002]
[Prior art]
  With the development of computer image processing technology and the development of digital data communication technology, digital images can be transmitted from one to the other in a short time regardless of distance. In particular, the recent development of Internet communication technology enables rational management of digital image transmission and reception, and its activities have an impact on daily life. For example, a specific vendor provides information including digital images to an unspecified number of consumers via an Internet communication system and conducts direct business without an intermediary, From the conventional system that has requested photograph processing to a specialist, a system for requesting a specific supplier from the unspecified number of clients via the Internet communication system has appeared. In addition, a photo processor with insufficient computer image processing facilities / capacity will enter into a business alliance with a network system through a well-known digital data transmission method with a vendor with high capabilities in this technology. In some cases, business rationalization has emerged.
[0003]
  However, such a digital image transmission / reception system has just begun, and it is a reality that there are still problems to be solved. One of the problems is a problem of inconsistency in the colors (brightness, contrast, saturation, color balance: hereinafter simply referred to as “color”) of an image transmitted between a pair of opposed computer image processing systems.
[0004]
  In general, in order to store an image as digital data in a computer, the image is read by a scanner or photographed by a digital camera, and then the digital camera is connected to the computer and the digital data of the image is transmitted to the computer and stored. However, in any case, it is unavoidable that the color of the original image and the color of the digital image displayed on the computer monitor are inconsistent. As will be described later, the reason is naturally due to the performance inherent in the reading device and the computer.
[0005]
  The degree of image color mismatch due to this unavoidable cause varies depending on the devices that make up the system, but the more the combination of a pair of opposing image processing systems increases, the more complicated it becomes. It is no exaggeration to say that the development of the digital information transmission system including it cannot be expected.
[0006]
[Problems to be solved by the invention]
  The present invention is a computer image processing system using a pair of computer image processing systems or a combination of a plurality of computer image processing systems, or two computer image processing via a digital image transmission / reception system such as an Internet communication system. It is an object of the present invention to provide a rational and practical image color correction method that solves the problem of image color mismatch when images are transmitted between systems.
[0007]
[Means for Solving the Problems]
  In order to solve such problems, the present invention constitutes a system in which the image color mismatch that occurs when an image is transmitted between mutually independent computer image processing systems A and B constitutes a difference in the reading performance of the image reading device. This color mismatch was developed based on experimental confirmation that the content of the image color mismatch did not change even if the target image was different. .
[0008]
  Based on the knowledge described above, the following basic technical idea of the present invention could be obtained.
  That is, in the image transmission between the corresponding systems A and B, on the premise that there is no change in the factor affecting the color of the digital image displayed on the monitor, the reference color image common to both systems is selected, A correction value to be applied to image color correction for matching the color of the digital image transmitted to one of the systems and displayed on the monitor with the color of the original image is set in advance using the reference color image as a medium, and the correction value is set. The basic technical idea of the present invention is to substantially match the color of the digital image displayed on the monitor of the transmission destination system with the color of the original image by performing the applied image color correction work.
  As a reference color image, a unique color image may be selected between the opposing systems and used for setting the correction value.
[0009]
  Next, a method for color correction of a transmission image based on this basic technical concept will be described in more detail with a representative example.
  First, a reference color image (RGB reference color image) is read by a system A scanner and stored as digital data in a computer memory, and this digital data is transmitted to the system B by a known method such as transmission by MO. The color of the digital image [brightness, contrast, saturation, color balance (RGB)] displayed on the monitor of the system B is known by a known method (color data (hereinafter referred to as the detailed setting dialog displayed on the computer monitor)). By simply operating the computer to adjust (referred to as color data), the color of the reference color image is substantially matched with the eye by visual observation, the deviation from the origin (zero point) of the color data is read, and the reference color image is converted into the system B. In order to substantially match the color of the digital image displayed on the monitor by transmitting the original image to System B in the same operation as This is performed as a preparatory work to be set as a correction value to be applied to the image color correction work, and when the image is transmitted from the system A to the system B of the specific original image, the color substantially matches the original image. The object of the present invention is achieved by the color correction operation of the digital image in which the above-described correction value is applied to the image color correction operation for displaying the digital image on the monitor of the system B.
  The color correction of the transmission image based on the basic technical idea described above naturally makes a difference in specific work depending on the mode of transmission, but the specific contents will be described later in the description of the embodiment.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
  It is a well-known fact that an information transmission system for connecting a pair of computer image processing systems A and B via a communication line has already been completed, and in this case digital data is accurately transmitted. It is also well known that similar results can be obtained when digital data is transmitted to both systems via the MO. Therefore, for convenience of explanation, the present invention will be described with reference to the following embodiment for the case of transmitting an image via the MO.
[0011]
  Before describing the embodiments of the present invention in detail, computer image processing systems A and B used in these experiments will be briefly described. That is, in the experiment conducted for confirming the embodiment of the present invention, a pair of independent computer image processing apparatuses owned by the applicant of the present invention are used, and the monitor is brought close to it particularly for the purpose of confirming the experiment result. Arranged.
  Next, these experimental facilities will be described with reference to FIG. As shown in FIG. 1, a power Macintosh G3 as a computer 1, a Diamond RD 21G manufactured by Mitsubishi Electric as a monitor 2, an Epson inkjet printer 2000C as a printer 3, a Microtech scan mechanism 5 as a scanner 4, and an Olympus servo as an MO driver 5. A system constituted by a computer image processing apparatus using MO 640C is system A, a power Macintosh 9600/300 as a computer 6, a Trinitron GPD-G 500J of Sony Corporation as a monitor 7, and an Epson inkjet printer 2000C as a printer 8. , A computer using a Microtec scan master 4 as the scanner 9 and an Olympus Turbo MO640S as the MO driver 10 The system constituted by the image processing apparatus as system B performs a predetermined experiment.
[0012]
[First embodiment]
  thisEmbodimentAssumes that the original image is transmitted from the system A to the system B via the MO, and the color of the digital image displayed on the monitor of the system B is displayed as a digital image substantially matching the color of the original image by eye measurement. This is a representative example of the present invention. Next, the results of experiments conducted to confirm the results of this embodiment will be described with reference to the flowchart shown in FIG.
  First, a well-known RGB reference color image (FIG. 3) was selected as a reference color image common to the systems A and B, and a fruit photograph (print) shown in FIG. 6 was adopted as a desired transmission original image.
[0013]
  First, as a first step of the preparatory work, this reference color image Z is scanned by the scanner 4 of the system A and stored as digital data in the memory of the computer 1, and this digital data is written to the MO by the MO drive 5, As two steps, the digital data of the MO is stored in the memory of the computer 6 of the system B via the MO drive of the system B, and the digital image Z is stored in the monitor 7.₁ It was displayed as.
[0014]
  Next, as a third step, the digital image Z₁ The computer 6 is operated to adjust the color data [brightness, contrast, saturation, color balance (R, G, B)] by operating the computer 6 so that the color of the monitor visually matches the reference color image Z. The digital image Z of the color substantially matching the color of the reference color image Z on the monitor₂Is displayed, the deviation from the origin (zero point) of the color data generated in this work is read, and in the case of image transmission by this work, the color of the digital image displayed on the monitor of the destination system is displayed. Was set as a correction value α to be applied to image color correction that substantially matches the color of the original image corresponding to the above, and the preparation work was completed. Incidentally, the correction values were lightness (−54), contrast (−9), saturation (0), and color balance [R (−8), G (0), B (−6)].
[0015]
  Next, as a fourth step of this experiment, the fruit print photograph X shown in FIG. 6 is scanned by the scanner 2 of the system A, stored in the memory of the computer, and this data is written to the MO by the MO drive 5. This MO is transmitted to the system B as a digital image X₁ It was displayed as. Next, as a sixth step, the digital image X₁ As a result of applying the correction value α to the image and performing the image color correction operation by operating the computer by the method of step 3, the digital image X having a color substantially matching the original image X visually₂ Could be displayed on the system B monitor.
[0016]
[Second embodiment]
  The basic technical idea of the present invention relating to image transmission between a pair of opposing systems A and B is second from the view that it is established between opposing image processing devices even in the same system.EmbodimentThe following experiment was conducted. That is, the outline is explained concretely. In this experiment, the original image is first read by the scanner, the read digital data is stored in the memory of the computer, and the digital image is displayed on the monitor of the computer. In addition, it was performed to confirm that the technique based on this technical concept also applies to image color correction in which the color of the digital image substantially matches the color of the original image with the color of the original image. In this experiment, the firstEmbodimentThe print image of the fruit (Fig. 6) used in the above experiment was used as the original image to be tested, and the above-described RGB reference color image Z (Fig. 3) was used as the reference color image as the medium. .
[0017]
  SecondEmbodimentThe experimental results will be described below with reference to the flowchart shown in FIG.
  First, in step 1, the reference color image Z is scanned by the scanner 2 of the system A, stored as digital data in the memory of the computer 1, and the digital image Z is stored in the monitor 2._Three It was displayed as. Next, this digital image Z_Three The color data [lightness, contrast, saturation, color balance (R, G, B)] displayed on the monitor 2 is adjusted by a known method of adjusting the computer 1 by operating the digital image Z._Three The color of the digital image Z is substantially matched with the color of the reference color image Z visually._Four Is displayed on the monitor (second step), and then, as a third step, the deviation from the origin (zero point) of the color data is read and set as a correction value β to be applied to image color correction, and the preparation work is completed. Incidentally, this value was lightness (−39), contrast (−3), saturation (0), and color balance [R (+1), G (0), B (+1)].
  Next, the color matching work for the image, which is the actual work, was performed. That is, as the fourth step, the printed photograph (FIG. 6) as the original image X is scanned by the scanner 4, the digital data is stored in the memory of the computer 1, and the digital image X is stored in the monitor 2 as the fifth step._Three It was displayed as. This digital image X_Three As a result of applying a known image color correction operation by applying the correction value β described above, a digital image X having a color substantially matching the original image X visually_Four Could be displayed on the monitor.
[0018]
  The result of this experiment is that when an independent original image is repeatedly scanned with the same system by a scanner and displayed on a computer monitor, it is easy to display a digital image having a color substantially matching the original image visually, and This shows that the image can be efficiently implemented. Even if extremely accurate color matching is required, the above-described image color correction is performed on the digital image displayed on the monitor by the method of the present invention, and further, This shows that the object can be achieved very efficiently and easily by a so-called finishing process for increasing the degree of color matching by a known method. From this result, the extremely high practical value of the present invention can be understood.
[0019]
[Third embodiment]
  Next thirdEmbodimentWhen the image is transmitted from the system A to the system B, the digital image X in which the image color substantially matches the original image X visually on the monitor 2 also in the system A._Four (Embodiment2) is displayed and this digital image X_Four Is transmitted to the system B via the MO, stored in the memory of the computer 6 of the system B, and the digital image X is stored in the monitor 7._Five This digital image X is displayed as_Five A digital image X of a color that substantially matches the original image X by performing image color correction work on₆ This is an experiment in which is displayed. like thisEmbodimentWhen the image is transmitted from the system A to the system B, the business meeting can be performed in a state in which digital images having the same configuration and substantially matching image colors are displayed on the respective monitors in both systems. It becomes possible. This thirdEmbodimentWill be described with reference to the flowchart of FIG.
[0020]
  This experiment consists of preparatory work and color matching of the actual digital image.EmbodimentSince there is an operation duplicated with No. 2, description will be given omitting the duplicate operation.
  First, as a first step, the digital image Z is transferred to the MO by the system A._Four Is transmitted to the system B as a second step, stored in the memory of the computer 6 of the system B, and the digital image Z is stored in the monitor 7._Five Was displayed. As a third step, the digital image Z displayed on the monitor 7 of the system B_Five The color correction operation is performed by adjusting the color data displayed on the monitor, corrected to a color that substantially matches the color of the original reference color image Z by visual inspection, and the deviation from the origin (zero point) of the color data is read. , Digital image Z_Five The digital image X of the original image X displayed on the monitor 7 in the same step operation as_Five Correction value applied to image color correction work performed forδAnd set up as finished. By the way, this correction valueδWas lightness (−15), contrast (−6), saturation (0), and color balance [R (−7), G (0), and B (−5).
[0021]
  Next, a description will be given of the image color correction work of the present application in which the original image X is transmitted from the system A to the system B and a digital image whose image color substantially matches the original image is visually displayed on the monitor of the system B.
  That is, as the fourth step, the digital image X corresponding to the original image X_Four Is written to the MO, and this MO is transmitted to the system B as a fifth step, and the digital image X is transmitted to the monitor 7 of the system._Five It was displayed as. Next, as a sixth step, the digital image X_Five The correction value forδAs a result of applying image color correction work (by computer operation), a digital image X that substantially matches the original image X visually₆ Can be displayed on the monitor 7.
[0022]
  More thanEmbodimentFrom the experimental results of 1, 2, and 3, the aforementioned correction values α, β,δI grasped the fact that there was an interesting relationship between them. That is, it has been found that the following relationship holds between these correction values.
            α − β ≒δ
  This relationship has been confirmed by repeated experiments.
  Furthermore, when a correction value to be applied when an image is transmitted from the system A to the system B is selected by these repeated experiments, the correction value and the absolute value are made the same when the image is transmitted from the system B to the system A. It has also been confirmed that the same image color correction result as described above is obtained by applying a correction value in which positive and negative are reversed.
[0023]
  As mentioned above, eachEmbodimentIn this experiment, the computer performs the color correction of the digital image displayed on the monitor 7 in the system B, and the color data (brightness, contrast, saturation, color balance) displayed on the monitor is based on the correction values described above. In the above embodiment, when the image is constantly transmitted between the systems A and B, or when a large number of images are transmitted and processed at the same time, the above-described embodiments are used. As described above, correction of the image color for each digital image by computer operation is somewhat complicated even if the method of the present invention is superior to the conventional method.
[0024]
[Fourth embodiment]
  However, the problem is that the image color correction action program corresponding to each image processing pattern is prepared by preparing the correction values described above, and this action program is installed in the corresponding computer to perform image color correction. Solved by doing the work. Next, an experiment when an action program is employed as the fourth embodiment will be described. Incidentally, since the creation of such an action program is already known as described in the manual of Adobe Photoshop 5.5 J, for example, the detailed explanation of the creation of the action program is omitted. In addition, this experimentEmbodimentSince it takes the form that is carried out following the work step 5 of 1 experiment,EmbodimentThis experiment is limited to explaining the work after step 3.
[0025]
  thisEmbodimentIn the experiment as No. 4, the work step 4 as the preparatory work was carried out as follows. That is, first, in the system B, the digital image Z is displayed on the monitor.₁ Is displayed, that is, the aforementioned correction value α, that is, lightness (−54), contrast (−9), saturation (0), color balance [R (−8), G (0), B (−6) )] Was applied to create an action program by a known method. Next, this action program was installed as the action program 1 in the computer 6 of the system B. Following the above preparatory workEmbodimentDigital image X for a plurality of original images of different colors by working steps 4 to 5 in one experiment₁ Is displayed on the monitor 7 of the system B, and the computer 6 is operated to call the action program 1 to perform image color correction work.EmbodimentWithout adjusting the individual color data displayed on the monitor as in the experiments 1, 2, and 3, color correction for each color data is automatically performed one after another by the action of the computer.EmbodimentThe same result as that of the experiment 1 was obtained.
[0026]
  In addition, since so-called batch processing is known in which a plurality of digital images stored as digital data in a computer memory are collectively processed, when it is necessary to correct the color of a plurality of transmission images, the system A and When images are regularly transmitted between the systems B, the work efficiency can be further improved by adopting this batch processing method. This fact is also confirmed by the experiment conducted after the experiment of this embodiment.
[0027]
[Fifth embodiment]
  nextEmbodiment5 shows experimental results assuming the case where the image color correction method of the present invention is used for a photo work based on a network method that is expected in the future.
  Currently, the so-called network-based photography industry, including printing, is a well-known fact both inside and outside of Japan. Yes. The following business method is given as an example of the specific mode. In other words, an organization with sufficient computer image processing technology and a so-called relay job that requests an organization a real job simply by receiving a request for image processing (image correction, processing, etc.) from the client A digital image processing network composed of an organization that specializes in the construction of a digital image processing network is constructed. For example, the entire country of Japan is divided into several blocks, one organization is provided for each block, and the organization that exists in each block Naturally, a business method for performing the above-described business by a configured network is assumed. Assuming this business mode, the following experiment was performed assuming that system B was organization B and system A was organization B.
[0028]
  In the experiment of this embodiment 5, specifically, the RGB reference color image Z is selected as the reference color image common to this network in the same manner as in the above-described embodiments 1 to 4, and the print of Mt. Bandai brought by the client When system A receives an order to create an enlarged photo based on photo X (original image: FIG. 7), performs a predetermined operation by system B, and delivers the final product (enlarged photo) to the client via system A Assumed. More specifically, the requester specifies the composition (image trimming) and the color balance of the image components in FIGS. 8 and 9 and the dimensions of the final product for the enlarged image of the original image (X). Therefore, the system A creates a specification (S) based on this designation, scans the original photograph image (X) and the specification (S) with its own scanner, and stores them in the computer 1 of the system A. , Write this data to MO and transmit to system B The system B stores the data from the MO in the computer 6 and displays the digital image (X ₁ ) For the digital image (S) of the specification (S) displayed on the monitor in the same manner. ₁ ) To execute a predetermined image processing, thereby obtaining a digital image (X ₇ ) Is displayed on the system B monitor, and this digital image (X ₇ ) To the system A, the image color is adjusted in accordance with the reverse transmission method described in paragraph [0022], and the digital image (X ₈ ) Is displayed and this digital image (X ₈ ) To system A (via MO), the digital image (X ₇ ) And the image composition and image color composition (X ₉ ) Was displayed.
[0029]
  Since the RGB reference color image is used as the reference color image in this experiment, the correction value α in the first embodiment is used as it is as the correction value applied to the color correction of the digital image performed in the system B. Therefore, in this experiment, the above-mentioned specification S was first prepared as a preparatory work. Next, as a first step, Mt. Bandai's printed photograph X and specification S are scanned with the scanner of system A, stored as digital data on the monitor of computer 1, and an MO in which this data is written is created and transmitted to system B. Digital image X on the monitor 7₁ , S₁ Was displayed.
[0030]
  This digital image X₁ , Digital image S₁ Apply the above correction value α, ie, brightness (−54), contrast (−9), saturation (0), and color balance [R (−8), G (0), B (−6)] Then, the image color correction is performed, and the digital image X having the same configuration as the original image X and the specification S on the monitor 7 and substantially matching the color is displayed. ₂  And digital specification S₂ Was displayed. And image X ₂  This digital specification S₂ The digital image X specified by the client referring to ₇  Is displayed on the monitor 7 of the system B.
[0031]
  Next, this digital image X ₇ The digital image having the same image configuration and substantially matching color is displayed on the monitor 2 of the system A. If the digital image is transmitted from the system B to the system A, it is natural that a change in the image color is unavoidable. Therefore, preliminary work based on the technical idea of the present invention is necessary, but the first and second embodiments described above are required. Correction values obtained from the experiments of α, βδ= Value obtained by reversing the sign of (α-β)−δThat is, the image color correction operation using the lightness (+15) contrast (+6), saturation (0), and color balance [R (+7), G (0), B (+5)] is applied to the digital image X. ₇  The correction digital image X ₈  Was displayed on the monitor 7. This digital image X ₈  As a result of transmitting the digital data of the digital image X to the system A via the MO, the digital image X is displayed on the monitor 2 of the system A. ₇  Digital image X with the same image configuration and substantially matching colors ₉ Could be displayed.
[0032]
  As a result, in the system A, the digital image X is obtained by a known method by a printer owned by the user. ₉ An enlarged print image based on the image can be created. In system B, digital image X ₇  Of course, it is possible to print according to the client's specifications based on the specifications and to transfer the work to the system.
[0033]
  Mentioned aboveEmbodimentSince both the systems A and B that were tested in the above are equipped with a scanner that reads an image, the original image is read by this scanner and stored as digital data in the memory of the computer. Since the digital data can be stored in the computer memory by a known technique, it is stored as digital data in the computer memory of the image processing system that is the transmission source, and the digital image displayed on the monitor is transmitted to the corresponding system. Alternatively, when digital data as an original image is stored in a memory of a computer of a system that is a transmission source via an MO and the digital image displayed on the monitor of the system is transmitted to another system, the digital image is transmitted. Also for color matching of digital images displayed on the previous monitor Naturally image color correction method of the present invention can be applied as it is.
[0034]
  More thanEmbodimentThe following became clear from the experiment. In other words, regardless of the selection of the reference color image, it is affected by the environment of the installation location where the work is performed, for example, lighting, etc., due to the visual color comparison, and there is a reading error by the observer Therefore, it cannot be avoided that the correction value setting applied to the image color correction work is accompanied by an error, which adversely affects the result of the image color correction according to the present invention. However, as a result of repeated experiments, it was found that if the following measures were taken, substantial effects could be expected. In other words, this correction value setting operation is obtained by an average value of results obtained by carrying out the same environment by a plurality of workers, or, in the case of one worker, obtained by repeated experiments (each experiment is carried out independently). It was found that the influence of the aforementioned error can be avoided to a considerable extent by setting the average value of the obtained data.
[0035]
【The invention's effect】
  As described above, the image color mismatch problem that cannot be avoided in the case of image transmission between the opposed systems A and B is obtained by applying a correction value set with a reference color image common to both systems as a medium. The image color correction method in the image transmission according to the present invention is a network system directly based on the image transmission because the image color can be corrected substantially more efficiently than the conventional method. In the case where the business by the company or the work that combines a plurality of independent image processing systems is performed within the same business organization, it can be expected to greatly contribute to the business transaction business that is performed through the advertisement through the Internet.
[Brief description of the drawings]
FIG. 1 Typical of the basic inventionEmbodimentExplanatory drawing which shows the outline | summary of the apparatus of the computer image processing systems A and B in FIG.
2 was implemented as image transmission between a pair of computer image processing systems A and B shown in FIG.EmbodimentThe flowchart which shows the content of 1 experiment.
3 is a diagram of an RGB reference color image used as a reference color image Z common to the system A and the system B in the image transmission shown in FIGS.
[Fig. 4]EmbodimentThe flowchart which showed the work content of 2.
[Figure 5]EmbodimentThe flowchart which showed the work content of 3. FIG.
[Fig. 6]EmbodimentThe diagram which shows the content of the print photograph of the fruit employ | adopted for 1 experiment.
[Fig. 7]Embodiment5 is a diagram showing the contents of a flint photograph of Mount Bandai used in the experiment of No. 5.
[Fig. 8]EmbodimentFIG. 6 is a diagram showing a part (trimming display) of a specification used in the experiment of 5.
FIG. 9EmbodimentFIG. 6 is a diagram showing a part of a specification (color balance display of an image) used in the experiment of 5.
[Explanation of symbols]
1 ... System A computer
2 ... System A monitor
3 ... System A printer
4 ... System A scanner
5 ... System A MO drive
6 ... System B computer
7 ... System B monitor
8 ... System B printer
9 ... System B scanner
10 ... System B MO drive
11 ... Background (sky)
12 ... Mt. Bandai
13 ... Unkai
14, 15, 26, 17 ... mountain waves

Claims (6)

Mutually independent computer image processing system A, an image color correction method in an image transmission between B,
Both systems include at least digital data storage means, calculation means, transmission / reception means, and at least system A is constituted by a computer system having an image input device.
First , an operation for preparing a reference color image (Z) having a color (brightness, contrast, saturation, color balance) such as an RGB reference color image as a reference color image common to both the systems;
The reference color image (Z) is stored as digital data in the A system via the image input device, and this data is transmitted to the other B system by a known method, and the digital image (Z ₁₎ is transmitted to the monitor. ) And display this digital image (Z ₁ ) As a target and a digital image (Z ₂ ) that substantially matches the color of the corresponding reference color image (Z) ) By a known method, and reading the deviation value α from the zero point (origin) in the color data displayed on the monitor in this color correction work;
The original image (X) is transmitted from the system A to the system B by the same method as the transmission method of the reference color image (Z), and the digital image (X ₁ ) is transmitted to the monitor of the system B. ) And the image color correction using the correction value α is performed on the digital image, and the digital image (X ₂ ) having a color substantially matching the color of the corresponding original image (X) is displayed. ) Is displayed on the monitor of the B system, and an image color correction method for image transmission is provided. An image color correction method in image transmission between computer image processing systems A and B independent of each other,
Both systems include at least digital data storage means, calculation means, transmission / reception means, and at least system A is constituted by a computer system having an image input device.
First, an operation for preparing a reference color image (Z) having a color (brightness, contrast, saturation, color balance) such as an RGB reference color image as a reference color image common to both the systems;
In the system A having an image input device, the digital data of the reference color image Z is stored through this device, and the digital image (Z _Three ) And a digital image (Z) in which the color of the digital image is substantially matched with the color of the reference color image Z by a known method. _Four ), And the deviation value from the origin (zero point) in the color correction data of the monitor display is converted into the monitor display digital image (Z _Three ) To obtain the color correction value β of
In addition, digital images (Z _Four ) From system A to system B and a digital image (Z _Five ) And display this digital image (Z _Five ) For a digital image (Z) that has been color-corrected by a known method so that the image color substantially matches the color of the reference color image (Z). ₆ ) And reading the deviation value from the origin (zero point) of the color correction data on the monitor display to obtain a correction value δ to be applied to this correction,
The original image (X) is stored in the system A via the image input device, and the digital image (X _Three ), The image is corrected by applying the correction value β to the digital image, and a digital image (X _Four ) And display this digital image (X _Four ) To system B and digital image (X _Five ) Is displayed, and the digital image (X _Five ) Is applied to the digital image color correction to which the correction value δ is applied, and the digital image (X ₆ ) Is displayed on the system B monitor
An image color correction method in image transmission, comprising: 3. The method of correcting an image color in image transmission according to claim 1, wherein the reference color image is an RGB reference color image. Color correction of the digital image displayed on the monitor is not performed manually for each of “lightness, contrast”, “saturation”, and “color balance”, and an action based on the correction value is performed. Install the computer program on your computer
3. The method of correcting an image color in image transmission according to claim 1, wherein color correction of a monitor display image as a transmission destination is performed by applying the action program. 5. The method of correcting image colors in image transmission according to claim 4, wherein when there are a large number of original images to be subjected to image color correction, the action program is applied by a known batch process. . An image color correction method in image transmission according to claim 1 or 2,
Along with the original image (X), a specification (S) describing the desired trimming for the original image (X) and the desired color configuration for image composition is transmitted from the system A to the system B, and the original image (X ) Digital image (X ₁ ) With the digital specification image (S ₁ ) And then applying these correction values α to these digital images (X ₁ ), (S ₁ ) Color correction and a digital image (X) whose color substantially matches the original image (X) on the monitor. ₂ ) And specifications (S) and digital images of specifications (S ₂ ), And a digital image (S ₂ ) According to the digital image (X ₂ ) Trimming and image component color correction by a known method to obtain a desired digital image (X ₇ ) Is displayed on the monitor,
This digital image (X ₇ ) As a correction value obtained by reversing the sign of the correction value δ, that is, a digital image (X ₈ ) On a monitor and then this digital image (X ₈ ) From system B to system A, the desired digital image (X ₇ ) And the digital image (X ₉ ) Is displayed, and the image color correction method in image transmission is characterized by the following.

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