JPH11205619A - Color matching method between different devices and computer readable record medium recording color matching program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform color matching between devices which have different color reproductive ranges by changing each component of the hue, lightness and saturation of a color reproductive range of a conversion source device based on a conversion ratio that is in inversely proportional to perceptive sensitivity ratio and physically displaying them on the conversion source device. SOLUTION: A compression type converting method is applied when a color reproductive area of a CRT monitor which has a wide color reproductive area is shifted into a color reproductive area of a narrow printer. A hue component in which human sensitivity is the highest is left as it is, a conversion ratio that is inversely proportional to sensitivity ratio between components is set to a lightness component and a saturation component, both components are changed to the direction of color conversion that is decided by the conversion ratio and they are shifted from a wide reproductive area to a narrow reproductive area. In such a case, about each point of an outer line of the wide reproductive area, a color change ratio is calculated from the distance of a color space coordinate axis of both outer lines to an (a) axis, the movement distance of each point is calculated based on the maximum change ratio and a converted color reproductive area is acquired by connecting points which are moved as far as a movement distance toward the a axis from each point on the outer line of the wide reproductive area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for producing a printed matter having no apparent discomfort with an original image on a CRT monitor between two devices having different color reproduction ranges, for example, a CRT monitor and a printing (or printing machine). The present invention relates to a color matching method between different devices that enables color conversion as created.

[0002]

2. Description of the Related Art A CRT monitor and a printing machine have different mechanisms for reproducing colors (coloring mechanism). The CRT monitor reproduces colors by additive color mixture using the three primary colors RGB of light. On the other hand, printing is represented by subtractive color mixture using the three primary colors CMY of color materials. CMY is an acronym for cyan, magenta, and yellow, and corresponds to a complementary color of R, G, and B (to be white when combined).

[0003] More specifically, additive color mixing is R
Different colors are formed due to the different proportions of the GB light to be added, and the higher the light intensity, the higher the brightness. On the other hand, the subtractive color mixture is a color formed by the CMY color material selectively absorbing a specific color from white light. As the color is different, the degree of absorption increases and the brightness becomes lower. Color. In addition, each color material of CMY absorbs a color corresponding to each complementary color. For example, a C (cyan) color material absorbs R and reflects GB components.

However, the CRT monitor and the printing use different color expression methods as described above.
Since the color reproduction range of the RT monitor is wider than that of the printing, among the colors of the CRT monitor, there are colors that cannot be reproduced by printing, and therefore, when the colors of the CRT monitor are expressed in printing and a printed matter is created, Often, the color of each point of the original image of the CRT monitor is not faithfully reproduced on the printed matter, giving a feeling of strangeness to humans.

[0005] The conventional method of color reproduction at a printing site is as follows. First, a skilled operator prepares an image obtained through a scanner from a photograph as a manuscript and predicts the finish of a printed matter while comparing the image with a photograph. There is a problem in that the disassembly conditions are set, and the degree of color matching with the original (photograph) of the printed matter depends on the skill of the operator.

On the other hand, digitalization of printing has progressed,
DTR (Desk Top Publ) where font type, size and layout are changed on CRT monitor and editing is advanced
ishing), the information displayed on the CRT monitor is required to be a document, and it is required that the information including colors is reproduced as a printed matter as it is. In order to cope with such a situation, an attempt has been made to create a printed matter in which the colors of each point of the original image on the CRT monitor are faithfully reproduced and the feeling of discomfort to human beings is small.
It is called Color Management System.

The basic concept of this system is the following three points. (A) Adoption of a device-independent color space In order to grasp the relative relationship between different colors for each device, a device-independent color space (for example, a Lab space) is adopted, and all are converted into the color space. Note that a color that can be perceived by humans is composed of three attributes, hue (color type), lightness (brightness), and saturation (brightness). , B can be represented by coordinates in a three-dimensional space having three axes. (A) Description of device characteristics by device profile Describe the color reproduction characteristics that differ for each device. (C) Absorption of differences in color reproduction range due to mapping in a device-independent color space For example, conversion of colors on a CRT monitor into colors that can be expressed by a printing machine (mapping of color reproduction ranges) minimizes discomfort.

[0008] The above system is an ICC (International Col.
or Consortium), for example, Lab color space is adopted as one of the device-independent color spaces, and device profiles and mappings are defined in the form of ICC profiles and Color Management Module, respectively. I have. To cope with this, device manufacturers need to use Labs, prepare profiles that describe the characteristics of their devices, and mappings that are optimal for their devices, and some manufacturers have already sold them, The content of the mapping function called Color Management Module is almost undisclosed.

Conventionally, for example, as a type of mapping for producing a printed matter having little apparent discomfort with respect to an original image on a CRT monitor, a color reproduction area of a CRT monitor is moved toward a color reproduction area of a print toward a center of coordinates. A compression type (see FIG. 1) that compresses at the same ratio to perform color conversion, and a common type that moves only an area that cannot be reproduced by printing to a color reproduction color outline without changing the area common to CRT monitor and printing. There is an area preservation type. Further, the common area preservation type is divided into a method of preserving lightness (see FIG. 2) and a method of preserving saturation (see FIG. 3), but neither of them has obtained a satisfactory result.

[0010]

SUMMARY OF THE INVENTION The object of the present invention is to provide a conventional device between two devices having different color reproduction ranges, for example, a CRT monitor and a printing press. An object of the present invention is to provide an excellent color matching method between different devices including a color conversion rule that can create a printed matter with less apparent unnaturalness. That is, in the conversion of colors between devices having different color reproduction ranges, which are physical masses unique to color devices, the color reproduction range of the conversion source device is converted with respect to the handling of the color reproduction range data, which is the physical mass. It is an object of the present invention to easily achieve correction of color gamut data, which is a physical mass, using a perceptual sensitivity ratio obtained by chromatic means when the color gamut cannot be included in the color gamut of the above device.

[0011]

A first aspect of the color matching method between different devices according to the present invention is to convert colors between devices having different color reproduction ranges, which are physical masses unique to each device. If the color gamut of the source device cannot be included in the color gamut of the destination device, the hue, lightness, and saturation components of the color gamut of the source device are
It is characterized by including changing based on a conversion ratio that is inversely proportional to the perceived sensitivity ratio, and physically displaying on the conversion destination device after being moved into the color reproduction range of the conversion destination device. is there.

A second aspect of the color matching method between different devices according to the present invention is a method of performing color conversion between devices having different color reproduction ranges, which are physical masses unique to each device. If the gamut cannot be included in the color gamut of the destination device, the hue, lightness, and saturation components of the color gamut of the source device are saved as they are without any change. To convert each component of the degree in the direction of color conversion determined by the conversion ratio inversely proportional to the perceptual sensitivity ratio, and to physically display it on the destination device after moving it into the color gamut of the destination device And characterized in that:

A third aspect of the color matching method between different devices according to the present invention is that, in the color conversion between devices having different color reproduction ranges, which are physical masses unique to each device, the color of the conversion source device is If the gamut cannot be included in the color gamut of the destination device, the hue, lightness, and saturation components of the color gamut of the source device are preserved without changing the hue components, and The color of the part that overlaps the color gamut of the other device is preserved as it is, and for the color of the part that does not overlap with the color gamut of the remaining destination device, each component of lightness and saturation is inverted to the perceptual sensitivity ratio. The conversion is performed in a direction determined by a proportional conversion ratio, and the display is physically displayed on the conversion destination device after being moved to the outline of the color gamut of the conversion destination device. Than it is.

According to a fourth aspect of the color matching method between different devices of the present invention, in the configuration of the first to third aspects, the perceptual sensitivity ratio between the brightness component and the saturation component is approximately 2: 1. It is characterized by the following.

The present invention further provides a computer-readable recording medium in which a color matching program for executing the first to fourth color matching methods between different devices is recorded.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a method of converting colors between devices having different color reproduction ranges, which are physical masses unique to a color device, between the conversion source device and the conversion destination device. The procedure of converting to the color coordinates of space and inputting it as color gamut data, and inversely proportional to the previously stored perceptual sensitivity ratio when the color gamut of the source device cannot be included in the color gamut of the destination device A procedure for converting the hue, lightness, and saturation components of the color in the color gamut of the source device based on the conversion ratio to be performed, and a procedure for outputting the converted color gamut data to the destination device, to the computer. The present invention relates to a computer-readable recording medium on which a program to be executed is recorded.

First, the Lab color space will be described. As described above, all colors that can be perceived by humans have three attributes: hue (color type), lightness (brightness), and saturation (brightness).
And can be represented by coordinates in a three-dimensional space (Lab color space) having three axes L, a, and b orthogonal to each other, as shown in FIG.

That is, the brightness depends on the height on the L axis.
Hue is determined by the inclination angle with respect to the a-axis, and saturation is calculated from the L-axis.
Each is represented by a distance. The Lab color space is
It is also called uniform visual perception space.
Color differences are defined to be uniform in all color spaces.
You. For example, there is a color A and a color B, and the color difference is
Each is represented by the distance between them in the Lab color space.
Color coordinates are (L₁, A ₁, B₁), (L_Two, A_Two,
b_Two), The color difference ΔΕ is defined by the following equation.

(Equation 1)

Next, the color perception sensitivity ratio will be described.
Prepare a sample group with the same color difference in the hue, lightness, and saturation directions from the reference sample, and compare and investigate the magnitude of the color difference actually perceived by humans.
The difference in human visual sensitivity (perceptual sensitivity ratio) to lightness and saturation is clarified (see Color difference evaluation by object (I), Hitoshi Komatsubara et al., Color Research, vol. 29, No. 2, 1982).

Therefore, the inventor prepared a sample called a standard color difference pair, attached a sensor capable of measuring the amount of light emission, and controlled the sensor to display a certain color accurately on a CRT monitor. As shown in FIG. 5, an experiment was performed in which sample images were displayed opposite to each other, and a large number of subjects quantitatively answered the color difference.

That is, on the CRT monitor, a sample to be evaluated (a reference sample of each color and a sample in which hue, lightness, and saturation are changed) is arranged on the left side of the figure, and a color difference (lightness) of 4 is displayed on the right side. A standard color difference pair of a reference gray color with a step change is arranged. The aim is to quantitatively understand the perceived color difference by letting you answer which of the standard color difference pairs on the right is the same as the perceived color difference between the samples to be evaluated on the left. What you want to do. As shown in FIG. 5, when a brightness difference is a target, a standard color difference pair of a reference gray color changed by four levels is arranged. The same applies to the case where the saturation difference and the hue difference are targets. This is to clarify how much different it looks when converted to lightness. In order to quantitatively grasp the color difference, the color difference ΔE shown in Expression (1) is used. Based on four basic colors (yellow, green, blue, red) that are often used in the world of color evaluation, with hue, lightness, and saturation changed in at least two steps (color difference 2 and 5) Is a sample. Basic 4
The Lab value recommended by the CIE (International Commission on Illumination) is used for the color. The color difference is set in at least two stages in order to determine the difference in sensitivity between the small color difference and the large color difference. It is generally said that a person can discriminate a color difference when the color difference is about 2 or more, and when the color difference is about 5, a difference is surely recognized. Therefore, at least two types are selected. FIG.
Shows the case where the yellow lightness is changed by 5. When a color is perceived, there is a visual characteristic called a color perception mode. When the background of the color chart is white or printed on blank paper, it is called a surface color mode. On the other hand, when the background is black, it is called an aperture color mode. The former is perceived as the surface of an object, and the latter is perceived as if the part emits light. In the case of printing (printing machine), since the final evaluation is a printed matter, it is necessary to be in the surface color mode. Therefore, the background of each color chart is white. While changing the evaluation sample under the above conditions, the subject is asked to answer the number of the standard color difference pair corresponding to the color difference perceived by the evaluation sample, and a questionnaire survey is performed.

Based on the results of the questionnaire, the visual sensitivity to three attributes of color (hue, lightness, and saturation) is quantitatively evaluated. Table 1 shows the results obtained by changing the color difference by 5, and Table 2 shows the results obtained by changing the color difference by 2 (hereinafter referred to as “color difference 5”, respectively).
Group "and" two groups of color difference ". ) Are shown.
The sample was divided into two groups of color differences and five groups of color differences, and the brightness, hue, and saturation directions were changed, respectively, and yellow, green, blue, and red were performed. Are shown in Tables 1 and 2. The larger the numerical value, the larger the difference in perceived color. Table 3 shows
The values obtained by simply averaging the results of the two color difference groups and the five color difference groups are shown.

[0023]

[Table 1]

[0024]

[Table 2]

[0025]

[Table 3]

Next, since the color difference of the second color difference group is 0.4 times as large as that of the fifth color difference group, the result of the color difference two group among the questionnaire results of the subject is multiplied by 0.4. The value multiplied by 0.4 is called the perceived color difference equivalent amount of the two color difference groups. The color difference equivalent amounts of the five color difference groups are the same values. The horizontal axis represents the actual color difference (in this case, 2 and 5), and the vertical axis represents the perceived color difference equivalent amount.
Plot to get a regression line. The slope of the regression line is sensitivity. When the hue is 1, the visual sensitivity based on Table 3 is hue 1.0, lightness 0.90, and saturation 0.42.
The above is the case where the color difference is changed by 2 and 5, but the influence is also affected by the target color difference, the number of test subjects, the quality, and the like. As a result of several questionnaire surveys and analysis, when the hue was fixed at 1.0, the lightness was 1.0 to 0.5.
7. Saturation is preferably in the range of 0.7 to 0.3, and more preferably, hue: lightness: saturation = 1.0:
It turned out to be 0.9: 0.5.

Next, the fact that the color reproduction range differs depending on the device will be described. The difference in color reproduction range depending on the device is measured by taking up a CRT monitor and a laser printer. The spectral distribution of the light source and the spectral reflectance of the object vary according to the wavelength. (Since the CRT monitor is a light-emitting type, no light source is required. ), Thereby obtaining the color coordinates of the color space. Further, the color coordinates of the white color coordinates were converted into the color coordinates of the Lab color space, and the color reproduction range of the CRT monitor and the laser printer was obtained. The results are shown in FIGS. According to them, the printed matter has a wider color gamut in some areas, but as a whole, CR
It is understood that the T monitor has a wider color reproduction range.

Finally, a color matching method between different devices in consideration of the perceptual sensitivity ratio of the present invention will be described.
Although the present invention relates to color conversion between devices having different color reproduction ranges, the target device is not limited to a device between a CRT monitor and printing, and is also effective for a combination of input devices such as a scanner and a digital camera. It is.

In a first mode of the color matching method between different devices according to the present invention, in the color conversion between devices having different color reproduction ranges, the color reproduction range of the conversion source device is changed to the color reproduction range of the conversion destination device. If it cannot be included in the color conversion, the hue, lightness, and saturation components of the color in the color gamut of the conversion source device are changed based on the conversion ratio inversely proportional to the perceptual sensitivity ratio, and the color reproduction of the conversion destination device is changed. It is characterized by being moved into the area. Therefore, the conversion ratio of each component is set in inverse proportion to the sensitivity ratio of each component of hue, lightness and saturation, and the color reproduction of a device with a wide color reproduction range in the direction of color conversion determined by the conversion ratio Since the gamut is changed as much as possible to match the color gamut of a device having a narrow color gamut, the sense of discomfort between the colors reproduced by the two is significantly reduced as compared with that of the conventional example.

According to a second aspect of the color matching method between different devices of the present invention, in the configuration of the first aspect, the hue component having the highest human sensitivity is stored as it is without changing, and the brightness / saturation of the hue component is not changed. It is characterized in that each component is changed in a color conversion direction determined by a conversion ratio inversely proportional to the perceptual sensitivity ratio, and is moved to within a color reproduction range of a conversion destination device. Therefore, in the direction of color conversion determined by the conversion ratio between the two components, which is set substantially in inverse proportion to the sensitivity ratio between the lightness component and the saturation component, the outline of the color gamut of a device with a wide color gamut Are transferred within the color gamut of a device with a narrow color gamut, so that the discomfort between the colors reproduced by the two is minimized. This has been confirmed, for example, from the results of a questionnaire for comparing and evaluating the discomfort between a CRT monitor and a printed matter for a large number of color samples with a conventional color conversion method.

In a third aspect of the color matching method between different devices according to the present invention, in the configuration of the first aspect, the hue component having the highest human sensitivity is not changed and stored as it is, and the conversion source is not changed. Of the device gamut colors of the device, the color of the part that overlaps with the color gamut of the conversion destination device is preserved as it is, and the color of the part that does not overlap with the color gamut of the remaining conversion destination device is It is characterized in that each component of the saturation is converted in a direction determined by a conversion ratio inversely proportional to the perceptual sensitivity ratio, and is shifted to the outline of the color reproduction range of the device of the conversion destination. Therefore, for example, from the results of the questionnaire in which the discomfort between the CRT monitor and the printed matter with respect to a large number of color samples is compared and evaluated with the conventional color conversion method, it is possible to obtain a printed matter that is much less uncomfortable than in the second embodiment. Many respondents answered that

According to a fourth aspect of the color matching method between different devices of the present invention, in the configuration of the first to third aspects, the perceptual sensitivity ratio between the lightness component and the saturation component is approximately 2: 1. It is characterized by the following. The term “approximately 2: 1” specifically means a range from 2: 0.6 to 2: 1.4, and a value within or near that range is sufficient. Therefore, it becomes clear that the sensitivity ratio between the lightness component and the saturation component is approximately 2: 1. Based on this, mapping is performed, and color matching between different devices is more accurately performed.

The present invention further provides a computer-readable recording medium on which a color matching program for executing the first to fourth color matching methods between different devices is recorded.

Further, as an embodiment of the present invention, a first detecting means for detecting color gamut data based on Lab space of a conversion source device, which is a physical mass,
Second detection means for detecting color gamut data based on Lab space, and color reproduction of the conversion source device detected by the first detection means. Means for converting each component of hue, lightness, and saturation of the color reproduction gamut data of the conversion source device based on a conversion ratio inversely proportional to the perceptual sensitivity when it cannot be included in the gamut;
A color matching apparatus by a computer between different devices including means for outputting the converted color reproduction area data to a conversion destination device is also conceivable. Regarding the method of converting the color gamut data of the conversion source device, each component of hue, lightness, and saturation of the color gamut data of the conversion source device is
Not only the method of performing conversion based on the conversion ratio inversely proportional to the perceptual sensitivity but also the above-described methods can be applied.

As an embodiment of the present invention, there is provided means for inputting color gamut data of a printer (conversion destination) based on Lab space, and a CRT (conversion source) Lab recorded in advance.
Means for converting each component of hue, lightness, and saturation of color gamut data of a CRT based on a conversion ratio inversely proportional to perceptual sensitivity when the color gamut based on space cannot be included in the color gamut of the printer. A computer-based color matching device including a unit for outputting the converted color reproduction area data to a printer is also conceivable. Regarding the method of converting the color gamut data of the CRT which is the conversion source device,
Not only the method of converting each component of the hue, lightness, and saturation of the color gamut data of T based on the conversion ratio inversely proportional to the perceptual sensitivity, but each of the above methods can be applied.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the color reproduction range of a CRT monitor having a wide color reproduction range (hereinafter referred to as "wide reproduction range") is shifted to the color reproduction range of a narrow printing press (hereinafter referred to as "narrow reproduction range"). Here is an example. Embodiment 1 A conversion method according to the present invention is applied to a compression type conversion method, and is referred to as a visual characteristic consideration type compression type. The hue component with the highest human sensitivity was preserved without change. A sensitivity ratio between components (for example, 2:
A conversion ratio (for example, 1: 2) inversely proportional to 1) was set.
Further, both components were changed in the direction of color conversion determined as shown in FIG. 9 according to the conversion ratio, and moved from a wide reproduction range to a narrow reproduction range. In FIG. 10, the length of a line segment extending from an arbitrary point on the outline of the wide reproduction range toward the a-axis (a = 0) in the color conversion direction and cut by the outline of the narrow reproduction range,
Further, the ratio (referred to as a change rate) to the length of the line segment cut by the a-axis was examined for each point of the contour line in the wide reproduction range, and the largest one (maximum change rate) was selected. . Next, the product of the length of a line segment extending from any point on the outline of the wide reproduction range toward the a-axis and cut by the a-axis and the maximum rate of change was determined. This product is the moving distance for each point on the outline of the wide reproduction range. Further, by connecting a point moved on each line segment toward the a-axis from an arbitrary point on the outline of the wide reproduction range by the moving distance, a converted outline of the new color reproduction range was obtained.

By the way, the lightness component and the saturation component are changed in the direction of the color conversion determined as shown in FIG. 9 by the conversion ratio, and there are two methods for shifting from the wide reproduction range to the narrow reproduction range. There is. As shown in FIG. 10 of the first embodiment, when changing each component of lightness and saturation in a wide reproduction range, one of them is changed at a fixed ratio based on some reference. Therefore, depending on the case, the converted new color reproduction range may be narrower than the narrow color reproduction range. Another example will be described in the second embodiment.

Embodiment 2 This is an application of the conversion method of the present invention to a common area preserving type method, which is referred to as a visual characteristic consideration type common common area. The hue component with the highest human sensitivity was preserved without change. A conversion ratio (for example, 1: 2) that is inversely proportional to a sensitivity ratio between components (for example, 2: 1) with respect to a lightness component and a saturation component.
It was set. Further, both components were changed in the direction of color conversion determined as shown in FIG. 9 according to the conversion ratio, and moved from a wide reproduction range to a narrow reproduction range. As shown in FIG.
Of the colors in the color gamut of the device with a wide color gamut, those colors that overlap with the color gamut of the device with a narrow color gamut are preserved as they are, and those that do not overlap with the color gamut of the other narrow devices are The respective components of lightness and chroma were changed in a direction determined by a conversion ratio inversely proportional to the sensitivity ratio, and were moved to the outline of the color reproduction range of a device having a narrow color reproduction range.

Comparative Examples 1 to 3 In Comparative Example 1, a compression type in which a color reproduction range of a CRT monitor is compressed to a color reproduction range of printing at the same ratio toward the center of coordinates to perform color conversion is used. Comparative Example 2 and Comparative Example 3 use a common area preservation type in which an area common to a CRT monitor and printing is kept as is, and only an area that cannot be reproduced by printing is moved to a color reproduction color outline. No. 2 used a method for preserving brightness, and Comparative Example 3 used a method for preserving chroma.

In order to evaluate the color conversion methods according to Examples 1 and 2 and Comparative Examples 1 to 3, G (edge) and B
For the color with b = 0 in the Lab space corresponding to (blue),
An evaluation was performed to rank a number of subjects in order of similar color. Table 4 shows the results. The printed matter with the least apparent discomfort to the original on the CRT monitor is
The first place and the most unusual printed matter are the fifth place, and the average ranking is shown in Table 4. B (blue) shows that according to the present invention, the ranking average values were 1.2 and 1.8, whereas
G (green) slightly varied and ranked at the 2.0th and 2.4th ranks, but in both cases, the result was that the feeling of discomfort was smaller than in the conventional example.

[0041]

[Table 4]

[0042]

According to the present invention, it is possible to minimize the discomfort that a printed matter gives a human being.
The color of each point of the original image on the T monitor can be reproduced as a printed matter as it is.

[Brief description of the drawings]

FIG. 1 is a graph showing a color gamut conversion method (compression type) as a conventional example.

FIG. 2 is a graph showing a color reproduction range conversion method (common region preservation type in which lightness is preserved) as a conventional example.

FIG. 3 is a graph showing a color reproduction range conversion method (common region preservation type in which saturation is preserved) as a conventional example.

FIG. 4 is a perspective view showing a Lab color space.

FIG. 5 is a conceptual diagram showing a method for investigating a perceptual sensitivity ratio using a CRT monitor screen.

FIG. 6 is a graph showing a color gamut on an ab plane.

FIG. 7 is a graph showing a color gamut on the La plane.

FIG. 8 is a graph showing a color gamut on a bL plane.

FIG. 9 is a conceptual diagram showing a color conversion method.

FIG. 10 is a graph showing a color gamut conversion method as an embodiment of the present invention.

FIG. 11 is a graph showing a color gamut conversion method as an embodiment of the present invention.

Claims (5)

[Claims] Claims: 1. In a color conversion between devices having different color reproduction ranges, which are physical physical masses unique to each device, when a color reproduction range of a conversion source device cannot be included in a color reproduction range of a conversion destination device. Changing each component of hue, lightness, and saturation of the color reproduction range of the conversion source device based on a conversion ratio inversely proportional to the perceived sensitivity ratio, and within the color reproduction range of the conversion destination device. And performing physical display on the conversion destination device after the transfer. 2. A method of converting colors between devices having different color reproduction ranges, which are physical masses unique to each device, wherein the color reproduction range of the conversion source device cannot be included in the color reproduction range of the conversion destination device. The hue / brightness / saturation components of the color gamut of the conversion source device are stored without changing the hue components, and the brightness / saturation components are inversely proportional to the perceptual sensitivity ratio. A color matching method between different devices, comprising: performing conversion in the direction of color conversion determined by the above method; and displaying the converted data in the color gamut of the conversion destination device and then physically displaying the converted color on the conversion destination device. 3. The color conversion between devices having different color reproduction ranges, which are physical masses unique to each device, wherein the color reproduction range of the conversion source device cannot be included in the color reproduction range of the conversion destination device. The hue, lightness, and saturation components of the color gamut of the conversion source device are stored without changing the hue components, and the color of the portion that overlaps with the color gamut of the conversion destination device is unchanged. Save and convert each component of lightness / saturation to the direction determined by the conversion ratio inversely proportional to the perceptual sensitivity ratio, for the color of the portion that does not overlap with the color gamut of the remaining conversion destination device. And then physically displaying the data on the outline of the color gamut of the conversion destination device and then physically displaying the color on the conversion destination device. 4. The color matching method between different devices according to claim 1, wherein a perceptual sensitivity ratio between the lightness component and the saturation component is approximately 2: 1. 5. A computer-readable recording medium on which a color matching program for executing the color matching method between different devices according to claim 1 is recorded.