JP2000230862A - Method and device for creating color chip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply create a color chip that less depends on a light source by referring to a second three-dimensional lookup table(3DLUT) for indicating the relationship between an average color difference and an output signal value, and by selecting drawing conditions that least depend on the light source from a first 3DLUT for indicating the relationship between a chromaticity value and the output signal value. SOLUTION: A 3DLUT creation means 20 creates a first 3DLUT for indicating the relationship between the chromaticity value of a test patch P obtained from a spectrophotometric colorimeter 14 and the output signal value of a digital image- outputting device 12. Also, a 3DLUT creation means 24 creates a second 3DLUT for indicating the relationship between the average color difference of the chromaticity value being obtained by switching a light source 16 and the output signal value. A drawing condition decision means 28 refers to the second 3DLUT from a plurality of drawing conditions obtained from the first 3DLUT by a plural condition selection means 26 to create a desired color chip, and determines drawing conditions that less depend on the second 3DLUT. Then, a drawing condition execution means 30 executes the drawing conditions and density and area modulation methods, and controls the digital image-outputting device 12 for outputting the color chip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for preparing a color chart, and more particularly to a method and apparatus for preparing a color chart using a photographic material.

[0002]

2. Description of the Related Art Conventionally, a color chart used for sensory evaluation of a color is prepared by preparing several kinds of pigments and dyes in advance, and directly mixing them.
It has been produced by coloring or dyeing a reflection or transmission base by a method such as coating. Then, a desired one is obtained from hundreds to thousands of kinds of color charts created in advance.

[0003]

However, it is difficult to obtain a color chart of a desired color with little dependency on a light source with high accuracy, simply, quickly and inexpensively by the above-mentioned conventional color chart preparation method. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a color chart having a small light source dependency and a method and apparatus for easily forming a desired color chart. That is the task.

[0005]

According to a first aspect of the present invention, there is provided a digital image output apparatus, comprising: a plurality of patches formed by a plurality of patches under a plurality of drawing conditions in which a density modulation method and an area modulation method are changed. A set is formed on a color light-sensitive material, the color of each set of patches is measured with a predetermined light source, a chromaticity value is obtained, and for each set of patches, the chromaticity value and In addition to creating a first three-dimensional look-up table representing the relationship with the output signal value when creating a set, the patch set is measured under a plurality of light sources different from the predetermined light source, Calculate the chromaticity values of the patches in the plurality of light sources, calculate the average color difference with the chromaticity values of the predetermined light source, and, for each set of patches, indicate the relationship between the average color difference and the output signal value. Create a 3D lookup table for Drawing conditions for creating a desired color chart are obtained from the first three-dimensional look-up table in a plurality of conditions, and the second three-dimensional look-up table is referred to. Selecting a small number of conditions, determining drawing conditions, and outputting the desired color chart by outputting to the color photosensitive material using the digital image output device according to the determined drawing conditions. To provide a color chart creation method.

[0006] Similarly, in order to solve the above-mentioned problem, a second aspect of the present invention is to provide a digital image output device, wherein a plurality of sets of patches are subjected to color exposure under a plurality of drawing conditions by changing a density modulation method and an area modulation method. Create a material, measure the color of each set of patches with a predetermined light source, determine the chromaticity value, and for each set of patches, the chromaticity value and the digital image output device create the set of patches Create a first three-dimensional look-up table representing the relationship with the output signal value when performing
Using the spectral transmittance or spectral reflectance of each patch obtained by measuring the set of each patch with the predetermined light source and a plurality of light source data obtained and held in advance by measurement, Calculate chromaticity values of the patches in the plurality of light sources, calculate an average color difference with the chromaticity values in the predetermined light source, and, for each set of patches, indicate a relationship between the average color difference and the output signal value. A second three-dimensional look-up table is created, a plurality of drawing conditions for creating a desired color chart are obtained from the first three-dimensional look-up table, and the second three-dimensional look-up table is referred to. By selecting a condition having little light source dependency from the plurality of conditions to determine a drawing condition, and outputting to the color photosensitive material using the digital image output device according to the determined drawing condition. Provides a color chart creation method characterized by generating the desired color chart.

It is preferable to use an error diffusion method, a pattern dither method or a noise adding method as the area modulation method.

[0008] Further, it is preferable that the drawing conditions are as follows: dot size / practical observation distance <0.00025.

Similarly, in order to solve the above-mentioned problem, a third aspect of the present invention is to form a plurality of sets of patches on a color photosensitive material under a plurality of drawing conditions by changing a density modulation method and an area modulation method. A digital image output device, means for measuring the color of each of the sets of patches with a predetermined light source, and calculating a chromaticity value; for each of the sets of patches, the chromaticity value; Means for creating a first three-dimensional look-up table representing the relationship with the output signal value when creating the set of patches; means for switching the light source when measuring the set of patches; A colorimetric value under a plurality of light sources different from the predetermined light source, obtain a chromaticity value, means for calculating an average color difference with the chromaticity value in the predetermined light source, for each set of patches, the average color difference Second 3 representing the relationship with the output signal value Means for creating an original lookup table, means for obtaining a plurality of conditions from the first three-dimensional lookup table for drawing conditions for creating a desired color chart, and reference to the second three-dimensional lookup table Means for selecting a condition having little light source dependence from the plurality of conditions, and determining a drawing condition; and forming the desired color chart on the color photosensitive material by the determined drawing condition. And a drawing condition executing means for controlling the digital image output device.

Further, in order to solve the above-mentioned problem, a fourth aspect of the present invention is a digital image forming method in which a plurality of sets of patches are formed on a color photosensitive material under a plurality of drawing conditions obtained by changing a density modulation method and an area modulation method. An output device, means for measuring the color of each set of patches with a predetermined light source to determine a chromaticity value, for each set of patches, the chromaticity value, and Means for creating a first three-dimensional look-up table representing a relationship with an output signal value at the time of creating; means for holding a plurality of light source data obtained by measurement in advance; Using the spectral transmittance or spectral reflectance obtained by measuring with a predetermined light source and the light source data stored in advance, the chromaticity values of the patches in the plurality of light sources are obtained, Color at light source Means for calculating the average color difference between the value,
For each pair of patches, means for creating a second three-dimensional look-up table representing the relationship between the average color difference and the output signal value, and drawing conditions for creating a desired color chart,
Means for obtaining a plurality of conditions from the first three-dimensional look-up table, and referring to the second three-dimensional look-up table, select a condition having little light source dependency from the plurality of conditions, and determine a drawing condition. And a drawing condition executing means for controlling the digital image output device to create the desired color chart on the color photosensitive material according to the determined drawing conditions. Provide a creation device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method and an apparatus for preparing a color chart according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings. The present invention provides a data processing unit,
In a hybrid system having a digital output unit, a color chart with little light source dependence is created using a reflective or transmissive color photosensitive material.

FIG. 1 is a block diagram schematically showing a color chart creating apparatus according to a first embodiment of the present invention. In FIG. 1, a color chart creation device 10 includes a digital image output device 12 that outputs a color patch P to a photosensitive material, a spectrophotometer 14 that measures a test patch P output by the digital image output device 12, and the patch. (A predetermined light source and a plurality of light sources different from the light source) 16 and means 18 for switching the light source, a chromaticity value obtained from the spectrophotometer 14 and the digital image output device 12 when the digital image output device 12 creates a test patch P Means for creating a first three-dimensional look-up table (hereinafter, referred to as 3DLUT) indicating the relationship with the output signal value of the first. In addition, the color chart creation device 10
Means 22 for calculating the average color difference of the chromaticity values obtained by measuring the color by the spectral colorimeter 14 by switching the light source 16 by the switching means 18, and the average color difference and the output signal value of the digital image output device 12 Second 3 showing the relationship with
It has means 24 for creating a DLUT. Further, the color chart creating device 10 includes a plurality of condition selecting means 26 for obtaining a plurality of drawing conditions for creating a desired color chart from the first 3DLUT, and from among the plurality of conditions, the second 3DLUT.
The drawing condition determination unit 28 that determines the drawing condition with the least light source dependence, and executes the determined drawing condition, the density modulation method, and the area modulation method to control the digital image output device 12 with reference to FIG. And a drawing condition execution means 30 for outputting a color chart.

The digital image output device 12 is a digital output device for color patch exposure, for example, CSI (CYMBOL).
Laser imagers such as LightJet of IC SCIENCE), Lambda of DURST, PHISUL of Fuji Photo Film, etc.
Alternatively, an LED printer or the like is exemplified. The spectrophotometer 14 is a test patch measurement spectrophotometer,
A densitometer in which the light source 16 and the switching means 18 are integrated and which can switch the light source may be used. It is sufficient that the color of the test patch can be measured by switching a plurality of different light sources, and the present invention is not particularly limited to these.

Further, a first 3DLUT creating means 20, an average color difference calculating means 22, a second 3DLUT creating means 24,
The computer (inside or outside the digital image output device 12) performs the function of each of the plural condition selection unit 26, the drawing condition determination unit 28, and the drawing condition execution unit 30.

The operation of the first embodiment will be described below. The digital image output device 12 changes the RGB output signal values by changing the average intensity (density modulation) and the amplitude (area modulation), and outputs the RGB output signal values to a color photosensitive material under a plurality of drawing conditions, as described later. First and second 3DL
A plurality of types (a plurality of sets) of test patches for creating a UT are created. In the group of a plurality of patches, for example, patches of a plurality of colors are arranged stepwise according to the density, and the maximum value of the difference in log exposure amount between adjacent patches is, for example, within 1.0. As described above, among the three primary colors, a patch of a color that is most likely to cause flare in an image output device is arranged in a stepwise manner as a solid patch in accordance with the density, and the other two color patches are arranged on the solid patch in a density. It is created so as to be arranged in stages according to it, but the creation method is not limited to this. The spectrocolorimeter 14 measures the colors of the plurality of test patches and converts them into colorimetric values. The first 3DLUT creating means 20 associates this colorimetric value with the output signal value of the digital image output device 12,
A plurality of types of 3DLUTs having different amplitudes are created. (This operation is to create a table by a drawing method using both area modulation and density modulation (average intensity change).)

On the other hand, the light source 16 is switched to the switching means 18.
, The light source is switched to a predetermined light source and a plurality of light sources different from the predetermined light source, and the colorimetry is similarly performed by the spectrophotometer 14 to calculate the chromaticity value. The average color difference calculating means 22 calculates an average color difference ΔE of a plurality of chromaticity values of each patch obtained by switching the plurality of light sources, as an amount indicating the light source dependence of each set of patches on the plurality of light sources.

The second 3DLUT creating means 24 regards the average color difference ΔE as a point in a three-dimensional space having coordinates (ΔE, ΔE, ΔE) and expands it into three dimensions. Corresponding to the output signal values of
Create a DLUT.

The plurality of condition selecting means 26 sets the drawing conditions for creating a desired color chart to the plurality of first 3DLUTs.
Find multiple conditions from Then, the drawing condition determination unit 28 refers to the second 3DLUT, selects a drawing condition with little light source dependence (that is, a small average color difference ΔE), and determines the drawing condition. Drawing condition execution means 30
Then, the digital image output device 12 is controlled according to the determined drawing conditions to expose the color photosensitive material. here,
As the area modulation method, an error diffusion method, a pattern dither method, a noise imparting (mask) method, or the like can be applied. Further, as the drawing dots, it is preferable that dot size / practical observation distance <0.00025. As described above, a target color chart with little dependence on the light source can be easily created.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The color chart making method of the present invention will be described more specifically below with reference to embodiments. Digital image output device 1
As No. 2, a film recorder LightJet 2080 manufactured by CSI was used, and Fuji Color Paper SUPER FA9 manufactured by Fuji Photo Film Co., Ltd. was used as a color photosensitive material. The drawing conditions are
Under the condition of 25 μm / pixel (RES40), the magnification is 200%, that is, 50 μm / pixel. In advance, the film recorder used Fire Ware (software for film recorder output) for SUPER FA9 output, and the output conditions were appropriately set by the method described in the manual.

Using the above equipment, the first and second 3D
A set of a plurality of test patches for creating an LUT was created under the above setting conditions. At this time, the signal values (RGB) of the film recorder are output by three types of drawing methods in which the average intensity and the amplitude are changed. That is, in addition to density modulation (continuous tone) drawing, a drawing method (area modulation) in which two kinds of amplitude changes are added.
Is used. Specifically, the two types are prepared by exposing light and shade in a pine pattern in a pixel unit, and preparing two types having different signal level ratios. For example, one is an arbitrary signal and 255 (white), and the other is an arbitrary signal and (255 + arbitrary signal) × 0.5. Thus, 3
A set of types of 3DLUT test patches is created.

The set of three types of test patches just created is separated.
Measured with a light colorimeter (Tokyo Denshoku TC1800),
CIE1976L * a * b * chromaticity obtained under light source
Calculate the value. Then, for each set of test patches,
Table showing the correspondence between the chromaticity values and the output values of the film recorder.
First three 3DLUTs are created. Also, at the same time, light
Each of the three patches when switching sources to different light sources
The quantity indicating the light source dependence of the set is determined. With this different light source
Are (1) a fluorescent lamp for color evaluation (a predetermined light source serving as a reference),
(2) A light source, (3) C light source, (4) D50, (5) D
55, (6) D65, (7) FL2, (8) FL7,
(9) Nine light sources of FL11. With these 9 light sources,
For a set of patches, nine density values (L_i ^*, A _i ^*,
b_i ^*) Is obtained. Fluorescent lamp for color evaluation based on this
The value according to (1) (L₁ ^*, a₁ ^*, B₁ ^*), Compared to
And the color difference ΔE ′ ΔE ′ = ｛(L₁ ^*-L_i ^*)^Two+ (A₁ ^*-A_i ^*)
^Two+ (B₁ ^*-B_i ^*)^Two｝^1/2 Is calculated. This average color difference ΔE is represented by (Δ
E, ＥE, ＥE) to extend three-dimensionally
The second 3DLUT representing the correspondence with the coder output value is
Three are created according to a set of three types of test patches.

Then, drawing conditions for creating a desired color chart are obtained. For example, now the desired color chart is (L ^* ,
a ^* , b ^* ) = (25,0,0), (40,0,0),
It is assumed that (65, 0, 0). For each patch, three sets of signal values are obtained from the three types of first 3DLUTs. The stability of the tint with respect to the change of the light source of the patch created when these three sets of signal values are given is evaluated with reference to the second 3DLUT, and the average color difference ΔE is the smallest and the most stable. Determine drawing conditions that are excellent in performance.

Finally, the color paper is exposed under the determined drawing conditions to create a desired color chart. The prepared color chart was measured by the above-mentioned apparatus, and the chromaticity value was calculated. Table 1 is based on the conventional method, and Table 2 is based on the present invention. In each table, chart 1 is (L ^* , a ^* , b ^* ) = (25,
0, 0), and chart 2 is (L ^* , a ^* , b ^* )
= (40,0,0), and chart 3 shows (L ^* , a
^* , B ^* ) = (65, 0, 0).

[0024]

[Table 1]

[0025]

[Table 2]

FIG. 2 shows the results. In FIG. 2, ○ indicates a case where the conventional L ^* = 25.
Is the conventional L ^* = 40, △ is the conventional L ^* = 65
Is the case. In addition, ● represents the case where L ^* = 25 of the present invention, Δ represents the case where L ^* = 40 of the present invention, and ▲ represents the case where L ^* = 65 of the present invention. 3 to 5 are shown separately for easy understanding. When FIG. 3 shows that L ^* = 25,
FIG. 4 shows the case where L ^* = 40, and FIG. 5 shows the case where L ^* = 65. In both cases, (A) is the related art and (B) is the present invention. In FIGS. 3 to 5, the numbers in the drawings represent the numbers of the light sources. As a whole, it can be seen that the present invention, which is black and solid, is less dependent on the light source and has better stability than the conventional one represented by white.

Next, a second embodiment of the present invention will be described. In the present embodiment, when creating the second 3DLUT, instead of actually switching the light source for each patch and performing color measurement, a plurality of light source data measured in advance is stored, and chromaticity is measured using the data. The value is obtained.

FIG. 6 is a block diagram schematically showing a color chart creating apparatus according to the second embodiment. This embodiment is different from the first embodiment in that there is no means for switching the light source, but instead a light source data holding means 132 for holding light source data on a plurality of representative light sources measured in advance. is there. The plurality of representative light source data held by the light source data holding unit 132 include (1) a fluorescent lamp for color evaluation (a predetermined light source serving as a reference), (2) an A light source, (3) a C light source, and (4) ) D50, (5) D55, (6) D65,
(7) FL2, (8) FL7, and (9) FL11. The units other than the light source data holding unit 132 are the same as those in the first embodiment.

In the creation of the second 3DLUT in the second embodiment, the light sources used are the same as those in the first embodiment, but switching of various light sources other than the basic predetermined fluorescent lamp for color evaluation is actually performed. Instead of switching the light source, the light source is switched by using light source data stored in the light source data storage unit 132 in advance. That is, each patch is multiplied by a spectral absorption waveform (spectral transmittance or spectral reflectance) measured by the spectrophotometer 114 using a predetermined light source as a base and light source data in a database of the light source data holding unit 132. , And a spectral colorimetric value is obtained. At this time, by switching the light source data, a result similar to that of actually switching a plurality of light sources in the first embodiment is obtained.

Thereafter, the average color difference calculating means 122 calculates the average color difference of the plurality of chromaticity values of each patch obtained by switching the plurality of light source data, and calculates the second color difference.
In the DLUT creating means 124, a plurality of second 3DLUTs are created as in the first embodiment. The following processing is the same as in the first embodiment, and the drawing condition with a small average color difference, that is, with little light source dependence is determined.
The digital image output device 112 creates a color chart with little light source dependence based on the drawing conditions.

In the concrete example of the second embodiment, the equipment used, the photosensitive material and the like are the same as those of the first embodiment. Also in the present embodiment, a color chart with little light source dependence similar to that of the first embodiment can be created with the same level of simplicity.

As described above, in any of the above-described embodiments, a color chart with little dependence on the light source can be easily created. In particular, when the measurement is actually performed by switching a plurality of light sources as in the first embodiment, a color chart with little light source dependency can be easily created in a material containing fluorescence.

Although the method and apparatus for preparing a color chart according to the present invention have been described in detail above, the present invention is not limited to the above-described embodiment, and may be made within the scope of the present invention.
Of course, various improvements and changes may be made.

[0034]

As described above, according to the present invention, by using a hybrid system having a processing section and a digital output section and a color photosensitive material, it is possible to easily produce a color chart with little light source dependence. . In particular, when the measurement is actually performed by switching a plurality of light sources, it is possible to easily create a color chart with little light source dependence in a material containing fluorescent light.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a color chart creation device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an effect of the present invention in comparison with a conventional example.

FIGS. 3A and 3B are explanatory diagrams showing the effect of the present invention when L ^* = 25, as compared with the conventional art, where FIG. 3A is the conventional art and FIG. 3B is the present invention.

FIGS. 4A and 4B are explanatory diagrams showing the effects of the present invention when L ^* = 40, as compared with the conventional case, where FIG. 4A is the conventional case and FIG.

FIGS. 5A and 5B are explanatory diagrams showing the effects of the present invention when L ^* = 65, as compared with the related art, where FIG. 5A is the related art and FIG.

FIG. 6 is a block diagram schematically illustrating a color chart creation device according to a second embodiment of the present invention.

[Explanation of symbols]

 10, 110 color chart creation device 12, 112 digital image output device 14, 114 spectral colorimeter 16, 116 light source 18 (light source) switching means 20, 120 first 3DLUT creation means 22, 122 average color difference calculation means 24, 124 Second 3DLUT creating means 26, 126 Multiple condition selecting means 28, 128 Drawing condition determining means 30, 130 Drawing condition executing means 132 Image data holding means

Claims (6)

[Claims] 1. A digital image output device creates a plurality of patch sets on a color photosensitive material under a plurality of drawing conditions in which a density modulation method and an area modulation method are changed, and measures each of the patch sets with a predetermined light source. A first three-dimensional representation of the relationship between the chromaticity value and the output signal value when the digital image output device creates the set of patches for each set of patches; Creating a look-up table, measuring the color of each set of patches under a plurality of light sources different from the predetermined light source, obtaining chromaticity values of the patches at the plurality of light sources, and calculating chromaticity values of the predetermined light sources. And a second three-dimensional look-up table representing a relationship between the average color difference and the output signal value is created for each set of patches, and a drawing for creating a desired color chart is made. The condition is the first 3
A plurality of conditions are obtained from a dimensional lookup table, a drawing condition is determined by referring to the second three-dimensional lookup table, and a condition having little light source dependence is selected from the plurality of conditions. A color chart creating method, wherein the desired color chart is created by outputting to the color photosensitive material using the digital image output device according to conditions. 2. A plurality of sets of patches are formed on a color photosensitive material by a digital image output device under a plurality of drawing conditions in which a density modulation method and an area modulation method are changed, and each of the sets of patches is measured by a predetermined light source. A first three-dimensional representation of the relationship between the chromaticity value and the output signal value when the digital image output device creates the set of patches for each set of patches; While creating a look-up table, the spectral transmittance or spectral reflectance of each patch obtained by measuring the set of each patch with the predetermined light source, and a plurality of light sources obtained and held in advance by measurement Using the data, a chromaticity value of each patch in the plurality of light sources is calculated, an average color difference with a chromaticity value in the predetermined light source is calculated, and for each set of patches, the average color difference and the output are calculated. Relation to signal value Create a second 3-dimensional look-up table representing the drawing conditions for creating the desired color chart, the first 3
A plurality of conditions are obtained from a dimensional lookup table, a drawing condition is determined by referring to the second three-dimensional lookup table, and a condition having little light source dependence is selected from the plurality of conditions. A color chart creating method, wherein the desired color chart is created by outputting to the color photosensitive material using the digital image output device according to conditions. 3. A color chart creating method according to claim 1, wherein an error diffusion method, a pattern dither method, or a noise adding method is used as the area modulation method. 4. The color chart creating method according to claim 1, wherein the drawing conditions are: dot size / practical observation distance <0.00025. 5. A digital image output device for forming a plurality of sets of patches on a color photosensitive material according to a plurality of drawing conditions obtained by changing the density modulation method and the area modulation method, and colorimetrically measuring each of the sets of patches with a predetermined light source. Means for calculating a chromaticity value, and for each set of patches, a first value representing a relationship between the chromaticity value and an output signal value when the digital image output device creates the set of patches. Means for creating a three-dimensional lookup table; means for switching the light source when measuring the set of patches; and measuring the color of each set of patches under a plurality of light sources different from the predetermined light source to obtain a chromaticity value. Means for calculating an average color difference with the chromaticity value of the predetermined light source; and a second three-dimensional lookup table representing a relationship between the average color difference and the output signal value for each set of patches. The means to create the desired color chart The drawing condition for forming the first 3
Means for obtaining a plurality of conditions from a dimensional look-up table; means for referring to the second three-dimensional look-up table, selecting a condition having little light source dependency from the plurality of conditions, and determining a drawing condition; And a drawing condition executing means for controlling the digital image output device to form the desired color chart on the color photosensitive material according to the determined drawing conditions. 6. A digital image output device for forming a plurality of sets of patches on a color photosensitive material according to a plurality of drawing conditions obtained by changing the density modulation method and the area modulation method, and colorimetrically measuring each of the sets of patches with a predetermined light source. Means for calculating a chromaticity value, and for each set of patches, a first value representing a relationship between the chromaticity value and an output signal value when the digital image output device creates the set of patches. Means for creating a three-dimensional lookup table; means for holding a plurality of light source data obtained by measurement in advance; and spectral transmittance or spectral reflection obtained by measuring the set of patches with the predetermined light source. Means for calculating chromaticity values of the plurality of light sources of each patch using the ratio and the light source data stored in advance, and calculating an average color difference between the chromaticity values of the predetermined light sources, For each set of patches Means for creating a second three-dimensional look-up table representing a relationship between the output signal value and the average color difference, the drawing conditions for creating the desired color chart, the first 3
Means for obtaining a plurality of conditions from a dimensional look-up table; means for referring to the second three-dimensional look-up table, selecting a condition having little light source dependency from the plurality of conditions, and determining a drawing condition; And a drawing condition executing means for controlling the digital image output device to form the desired color chart on the color photosensitive material according to the determined drawing conditions.