JP2009079171A - Method and program for determining formulation of multicolored pattern coating harmonizing with surrounding colors - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a program for determining the formulation of a multicolored pattern coating for forming a multicolored pattern coating film harmonizing with surrounding colors. <P>SOLUTION: The multicolored pattern coating comprises a transparent component for forming a coating film and three kinds of colorant particles. The method for determining the formulation of the multicolored pattern coating includes a step (S4) of setting target colors out of colors same as the surrounding colors and colors similar to the surrounding colors and to determine the tri-stimulus values for the target colors, a step (S5) of selecting one target color among the target colors, a step (S6) of selecting three kinds of the colorant particles from the data base in which the information identifying the colorant particles and their corresponding tri-stimulus values are recorded and a step (S7) of determining the formulation of the colorant particles by solving a set of simultaneous equations with the tri-stimulus values for the target color as constants, the tri-stimulus values for the selected three kinds of the colorant particles as coefficients and the amount of formulation of the selected three kinds of the colorant particles as variables. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for determining the composition of a multicolored pattern-forming paint so that the multicolored paint film formed on the object in harmony with the surrounding color, that is, based on the surrounding color, the multicolored pattern-forming paint The present invention relates to a method for determining the type and amount of colored particles to be blended in the stencil.

  In some cases, a colorful pattern design is imparted to the interior wall surface or exterior wall surface of a building for the purpose of imparting characteristics. In order to give a colorful pattern design to an object, it is painted using a paint for forming a colorful pattern, and a colorful pattern coating film is formed on the surface of the object. When a colorful pattern design is imparted to a wall surface, a colorful pattern is often imparted to a part of the wall surface instead of making the entire wall surface a colorful pattern. In that case, it is important to harmonize the portion to which the colorful pattern is given and the surrounding color. As a method of harmonizing the multi-colored paint film with the surroundings, a method of designing the multi-colored pattern so that the color when the multi-colored pattern is observed from a distance that cannot recognize the fine pattern of the multicolored pattern and the surrounding color are approximated There is.

  In order to carry out the above method, for example, bring a sample of a plurality of paints for forming a multicolored pattern with different composition to the part where the multicolored pattern design is actually given, Whether or not to apply a paint for forming a multicolored pattern is selected, or a color sample corresponding to the surrounding color is compared with a sample of a plurality of paints for forming a multicolored pattern. When determining the actual pattern to be applied using a paint sample for forming a multicolored pattern, it is difficult to recall the case of painting a large area from a relatively small paint sample. There is a possibility that it becomes a multi-colored pattern that is not in harmony with. Furthermore, there are few color variations in the paint swatches for forming the multicolored pattern, and there are cases where it is not possible to select a paint swatch that matches the surrounding colors.

On the other hand, Patent Document 1 below discloses a method for easily and quickly determining a raw material paint for a multicolor pattern forming paint (hereinafter also referred to as a multicolor paint). That is, in the following Patent Document 1, an image image of a multicolored paint film is prepared, the types of colors constituting the image image are analyzed, the colors constituting the analyzed multicolored paint film image, The area ratio that the color occupies in the image of the multicolor pattern coating film is determined, and the blending ratio of each colored paint particle is determined based on the determined area ratio.
JP-A-9-220508

  However, until now, there has been no known technique for determining the composition of a paint for forming a multicolor pattern that can form a multicolored paint film that matches the surrounding color.

  For example, the above-mentioned Patent Document 1 merely discloses a method for determining the composition of a paint for forming a multicolored pattern that can form a multicolored pattern from the image of the multicolored paint film. There is no description or suggestion regarding the harmony between and the surrounding colors.

  The object of the present invention is in harmony with surrounding colors when a multicolored paint is formed on a colored base material by applying a multicolored paint containing a transparent paint film forming component and irregular colored particles. An object of the present invention is to provide a method and program for determining a paint for forming a multicolor pattern, which can determine the composition of the multicolor paint for forming a multicolor paint film and the visual characteristics of the substrate.

  In the present invention, the multicolored pattern coating film formed on the base material having the same color as the surrounding color or an approximate color is separated by a distance (for example, about 5 to 10 m) to the extent that a fine pattern of the multicolored pattern cannot be recognized. The composition of the colored particles contained in the multicolor pattern-forming coating material is determined so as to give the impression that the color is the same or similar to the surrounding color when visually observed.

  That is, the method for determining the composition of the multicolor pattern forming paint according to the present invention is such that the multicolored pattern formed by coating the multicolored pattern forming paint on the colored base material matches the surrounding color of the multicolored pattern. A method for determining the composition of the multicolor pattern forming paint, wherein the multicolor pattern forming paint contains a transparent coating film forming component and three kinds of colored particles, and the tristimulus value with the surrounding color or A first step of determining a tristimulus value approximate to the tristimulus value as a tristimulus value of a target color; a second step of designating each color of the three kinds of colored particles; and the tristimulus of the target color The three solutions of the simultaneous equations with the value as a constant, the tristimulus value of the three kinds of colored particles as a coefficient, and the blending amount of the colored particles as variables are defined as the blending amounts of the three kinds of colored particles. And a third step of determining.

  The first step is a step of determining, as the plurality of target colors, a color that is the same as the tristimulus value of the surrounding color and a color that approximates the tristimulus value of the surrounding color, and the second step is , A step of selecting three kinds of colored particles from a set of elements that correspond to information specifying the colored particles and the tristimulus values of the colored particles to form a colored particle set, Before, the method further includes a fourth step of selecting one target color from the plurality of target colors, wherein the third step includes the target color selected in the fourth step and the set in the second step. And the tristimulus values of the three kinds of colored particles constituting the colored particle set selected from among the above.

  The third step includes a fifth step of determining whether or not the three solutions of the simultaneous equations include negative values, and a case where the three solutions include negative values. And a sixth step of excluding the three solutions from the determined blending amount.

In the third step, the color difference in the L ^* a ^* b ^* space between the color represented by the tristimulus values obtained by substituting the three solutions of the simultaneous equations into the simultaneous equations and the surrounding color is determined. A seventh step of determining whether the color difference is 5 or more, and an eighth step of excluding the three solutions from the determined blending amount when the color difference is 5 or more.

  Further, the third step excludes the three solutions from the determined blending amount if a solution that is 90% or more is included when the three solutions of the simultaneous equations are expressed in percentage. A ninth step can be included.

  Further, the third step excludes the three solutions from the determined blending amount if a solution that is 5% or less is included when the three solutions of the simultaneous equations are expressed in percentage. A tenth step can be included.

The method may further include an eleventh step of determining a color having a color difference of 10 or less from the surrounding colors in the L ^* a ^* b ^* color system as the color of the base material.

  In addition, the first step to the fourth step are repeatedly executed to determine one colored particle set from the colored particle set for which the blending amount has been determined, and three types of colored particles constituting the colored particle set The method further includes a twelfth step of determining, as the color of the base material, a color that is the same as or similar to the additive mixed color obtained by using the three stimulus values and the three blending amounts corresponding to the three kinds of the colored particles. Good.

  The program for determining the composition of the multicolor pattern forming paint according to the present invention is executed by a computer equipped with a recording means, and the multicolor pattern formed by coating the multicolor pattern forming paint on a colored substrate is A program for determining the composition of a paint for forming a colorful pattern so as to harmonize with surrounding colors, wherein the paint for forming a colorful pattern includes a transparent coating film forming component and three kinds of colored particles, In addition, the first function of determining the tristimulus values of the surrounding colors and the tristimulus values approximate to the tristimulus values as tristimulus values of a plurality of target colors, information for specifying colored particles, and the colored particles A third function of selecting three types of colored particles from the database recorded in the recording means in association with the tristimulus values of the target, and selecting a plurality of colored particles as target colored particles, and a plurality of functions determined by the first function Of the target color The third function of selecting one target color from the above, the tristimulus values of the selected target color as constants, the tristimulus values of the three types of target coloring particles as coefficients, and the three types of target coloring Solving simultaneous equations with the compounding amount of the particles as a variable, determining the obtained solution as the compounding amount of the target colored particles, and recording it in the recording means in correspondence with the information for specifying the target colored particles It is characterized by realizing functions.

  ADVANTAGE OF THE INVENTION According to this invention, the mixing | blending of the coating material for multicolor pattern formation and the color of a base material which form a multicolored paint film in harmony with the surrounding color can be determined accurately and efficiently.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a schematic configuration of a computer system used for carrying out a method for determining the composition of a multicolor pattern forming paint for forming a multicolor pattern paint film that harmonizes with surrounding colors according to an embodiment of the present invention. It is. This system includes a processing device 101 having an operation unit, an image display device (hereinafter abbreviated as a display device) 102 connected to the processing device 101 and capable of displaying a full color image, and an object 104 to which a multicolored pattern is applied. And a measuring device 103 that acquires the color information of the image and transfers it to the processing device 101 via a predetermined interface.

  The processing apparatus 101 is a computer, for example, and includes a keyboard and a mouse as operation means. The display device 102 is, for example, a CRT display device or a liquid crystal display device. The measuring device 103 is, for example, a colorimeter, a spectrocolorimeter, a spectrophotometer, a luminance meter, a video camera (CCD camera), or the like. The interface for transferring data between the measuring apparatus 103 and the processing apparatus 101 is not limited to a wired interface, and may be a wireless interface, such as a recording medium (flexible disk, magneto-optical disk, IC memory, etc.). ) And its reading means.

  First, the paint for forming a multicolor pattern for forming a multicolor paint film will be described. The paint for forming a multicolor pattern includes a vehicle component that forms a transparent coating film and minute irregular colored particles. The average particle size of the colored particles can be arbitrarily determined within a range of 0.1 to 5 mm, and the particle size distribution is close to a lognormal distribution. When the paint for forming a multicolored pattern is applied, the colored particles of the same color come into contact with each other and overlap to form a continuous amorphous region (spot) of the same color. By blending colored particles of different colors in combination, a paint capable of forming various multicolored paint films can be produced.

  Here, the color of the colored particles is determined by the type and amount of the coloring material contained in the colored particles. The ratio of the entire colored particles to the vehicle component is limited by the storability of the paint, the workability when forming the coating, the performance of the coating, and the like. Further, in the paint for forming a multicolor pattern, 1 to 3 kinds of colored particles are usually used from the viewpoint of the design of the multicolor pattern coating film formed and the stability of the multicolor pattern formation. In the present invention, as described later, three kinds of colored particles are used.

  When forming a multicolored paint film, it is usually formed by coating a colored base material with a paint for forming a multicolored pattern. The color of the substrate is determined according to the design of the multi-pattern coating film. Usually, the color is determined so that there is no sense of incongruity even when it is not completely concealed by the paint for forming a colorful pattern.

  FIG. 2 is a diagram conceptually showing a target coating state. The left side of FIG. 2 is a plan view, in which (A) is a base material, and (B) is a multicolor pattern formed using a multicolor pattern forming paint having a blending amount determined by a method described later. FIG. 2C is a cross-sectional view, in which the uppermost layer is a multi-colored coating film, and the undercoat under it is a base material. A small figure in the uppermost layer represents each colored particle, and a space between the colored particles is a binder (vehicle).

  Next, the method for determining the composition of the multicolor pattern forming paint according to the embodiment of the present invention will be described in detail. FIG. 3 is a flowchart for explaining a method for determining the composition of the paint for forming a colorful pattern using the system shown in FIG. In the following description, the processing performed by the processing apparatus 101 in response to an operation by an operator (such as a designer) is performed by an internal arithmetic element (hereinafter referred to as a CPU) from a recording means (such as a hard disk drive). Data is read out to an internal temporary storage means (hereinafter referred to as memory) and is performed using the memory as a work area, and the CPU appropriately records the processing results in the recording means.

In addition, it is assumed that information (color name, code, etc.) for specifying colored particles and tristimulus values as color information of the colored particles are associated with each other in the recording means inside the processing apparatus 101 in a database. The tristimulus value means a psychophysical quantity that expresses a color as a numerical value in a format that matches a human sense. Specific examples include XYZ values, L ^* a ^* b ^* values, RGB values, and the like. There are various methods for obtaining the tristimulus value of the color of the colored particles. For example, a tristimulus value of a desired color system can be obtained from the spectral reflectance and tristimulus values obtained by measuring the color of actual colored particles. Alternatively, the tristimulus value can be calculated by performing known CCM (Computer Color Matching) from the composition of the colorant (coloring pigment, dye, etc.) blended in the actual colored particles.

  In step S1, the measurement device 103 is operated by the observer, and the tristimulus values of the surrounding colors to be harmonized or the data for obtaining the tristimulus values are measured. The measured data is transmitted to the processing apparatus 101 and recorded in the recording means. The color system is not particularly limited, and may be three stimulus values that can display colors as numerical values and have no correlation with each other. There are various methods for acquiring the tristimulus values of the surrounding colors. For example, the following method can be given.

  When the colorful pattern is applied to a part of the wall surface or the like, the color of the surrounding wall surface becomes the color of the surrounding of the colorful pattern coating film, so that the surrounding wall surface can be directly measured. The color measurement method is not particularly limited. Ordinary colorimeters, spectrocolorimeters, and spectrophotometers can be used. When the luminance meter is used, the processing device 101 may acquire the spectral reflectance as data obtained by measurement and obtain the tristimulus value by calculation. When a tristimulus value direct reading meter is used as the color meter, the measured value can be directly used as the tristimulus value. Alternatively, in the case of using a colorimeter that cannot directly determine the tristimulus value of the desired color system, the processing apparatus 101 uses the tristimulus of the desired color system from the obtained tristimulus value of the color system. The value may be converted using a known function.

  If color measurement is not possible directly around the area to which the multicolored pattern is applied, a tristimulus value of the surrounding color can be obtained using a luminance meter. Alternatively, by using a video camera, the surroundings of the part to which the colorful pattern is applied can be imaged, and the processing apparatus 101 can obtain the tristimulus values from the image data obtained by imaging.

  In the following, it is assumed that the sRGB (standard RGB) values (Rt, Gt, Bt) of the surrounding colors are calculated by the processing device 101 from directly measured or transferred data.

  In step S <b> 2, the processing apparatus 101 determines the color of the base material for forming a colorful pattern that matches the surrounding color. The color of the substrate is determined based on the tristimulus values of the surrounding colors determined in step S1. As described later, there are various methods for determining the color of the substrate from the tristimulus values of the surrounding colors. Here, to simplify the explanation, it is assumed that the color of the base material is determined as a color (Rt, Gt, Bt) having the same tristimulus values as the surrounding colors.

  When the color of the base material is applied by coloring paint, if the tristimulus value is determined, the paint for forming the base material can be determined by a known method. For example, the composition of the paint can be determined by performing known CCM with the determined tristimulus value as a target.

  In step S <b> 3, the operator operates the processing device 101 to designate (at least three) candidate colored particles to be blended in the colorful pattern forming paint from the database of the recording means. Here, it is assumed that N kinds of colored particles having code numbers 1 to N are designated.

  In step S4, the processing apparatus 101 obtains tristimulus values (Rs, Gs, Bs) that approximate the tristimulus values (Rt, Gt, Bt) of the surrounding colors determined in step S1, and determines the tristimulus of the surrounding colors. Along with the stimulus values (Rt, Gt, Bt), they are recorded as “tristimulus values of the target color”. For example, in the sRGB space, the tristimulus values (Rs, Gs, Bs) are determined so that the geometric distance from the sRGB values (Rt, Gt, Bt) of surrounding colors is 1 or less. If the color difference in the sRGB space is 1 or less, the colors actually look the same. Here, since the sRGB value is represented as a digital value (for example, an integer of 0 to 255 if it is 8 bits), tristimulus values (Ri, Gi, Bi) of a finite number of target colors are obtained. Further, the set of tristimulus values (Ri, Gi, Bi) of the target color is obtained by calculating both the tristimulus values (Rt, Gt, Bt) of the surrounding color and the tristimulus values (Rs, Gs, Bs) approximated thereto. Including.

  In step S5, the processing apparatus 101 reads one tristimulus value (Ri, Gi, Bi) of the target color determined in step S4 from the recording unit.

  In step S6, the processing apparatus 101 selects three types of colored particles from the colored particles specified in step S3 without overlapping, and the colored particles (hereinafter referred to as “target colored particles”) for which the blending amount is to be obtained. The tristimulus values of the target colored particles are read out from the recording means. The selected three types of target colored particles are colored particles 1, colored particles 2 and colored particles 3, and the corresponding tristimulus values are (Rj, Gj, Bj) (j is 1, 2 or 3).

In step S7, the processing apparatus 101 uses the tristimulus values of the three types of target colored particles read out in step S6 to reproduce the target color tristimulus values (Ri, Gi, Bi). The blending amount of particles (the ratio (weight%) of the weight of each kind of colored particles to the total weight of the colored particles) is determined and recorded. When three kinds of colored particles 1, colored particles 2, and colored particles 3 are blended in the paint for forming a colored pattern, the blended amount of each colored particle is x mass% of colored particles 1, and colored particles Suppose that 2 is y mass% and the colored particles 3 are z mass%. Here, x + y + z = 100. Moreover, the magnitude | size of a colored particle shall be 0.5-1 mm as an average particle diameter. Since this particle size is larger than the wavelength of visible light, the color obtained by mixing three kinds of colored particles is proportional to the area of the spots formed by the colored particles. Assuming that the specific gravity of the three colored particles is almost the same, it is considered that there is additive color mixing, so the following formulas 1 to 3 hold.
Ri = xR1 + yR2 + zR3 (Formula 1)
Gi = xG1 + yG2 + zG3 (Formula 2)
Bi = xB1 + yB2 + zB3 (Formula 3)
These are simultaneous equations in which Ri, Gi, Bi are constants, Rj, Gj, Bj (j is 1, 2 or 3) are coefficients, and x, y, z are variables. Therefore, the processing apparatus 101 can determine the blending amounts of the colored particles 1, the colored particles 2, and the colored particles 3 by obtaining x, y, and z from the above simultaneous equations. In addition, since the method of calculating | requiring the solution of a linear simultaneous equation by numerical calculation is well-known, description is abbreviate | omitted.

In step S8, the processing apparatus 101 determines whether or not the blending amounts (x, y, z) of the three types of target colored particles obtained in step S7 are applicable to the production of a multicolor pattern forming paint. For example, when the obtained blending amount is a negative value, it is not actually possible to produce a paint for forming a colorful pattern. Therefore, the processing apparatus 101 determines whether or not the result of step S7 corresponds to the following condition, and proceeds to step S9 only when all the conditions are not satisfied, and otherwise proceeds to step S10. To do.
First condition: Any of x, y, and z is negative.
Second condition: In the L ^* a ^* b ^* color system, the color difference from surrounding colors is greater than 5.
3rd condition: The compounding quantity of 1 type of colored particles is 90% or more.
4th condition: The compounding quantity of 1 type of colored particles is 5% or less.

  In any of these cases, the target multicolor pattern cannot be formed using the selected three kinds of colored particles. That is, when the first condition is satisfied, the multicolor pattern forming paint cannot be manufactured as described above.

Further, when the second condition is satisfied, it does not look the same color as the surrounding colors. In XYZ space and sRGB space, the relationship between the geometric distance and the color difference perceived by humans differs depending on the location in the space, so it is necessary to make a judgment based on the distance in the L ^* a ^* b ^* space that matches the human sense. is there. Therefore, in order to exclude the case where the same color as the surrounding colors does not appear, the tristimulus values (Ri, Gi, Bi) of the target color and the tristimulus values (Rt, Gt, Bt) of the surrounding colors are calculated. The second condition is that the color difference obtained by converting into L ^* a ^* b ^* values is greater than 5. Since two colors having a color difference of 5 or less in the L ^* a ^* b ^* color system appear to be the same color, in this specification, the color difference from the surrounding colors in the L ^* a ^* b ^* color system is A color that is 5 or less is referred to as “the same color as the surrounding colors”.

  Further, when the third condition is satisfied, the colorful pattern becomes monotonous and is not preferable in design. Furthermore, when the fourth condition is satisfied, spots cannot be recognized in the colorful pattern.

  In step S <b> 9, the processing apparatus 101 records x, y, and z determined in step S <b> 7 in association with colored particle information (information for specifying three types of colored particles).

  In step S10, the processing apparatus 101 has performed the processes in steps S7 to S9 for all combinations that select three types of colored particles without overlapping from the N types of colored particles specified in step S3. Determine whether. If there is a combination that has not been processed, the process returns to step S6, a combination other than the combination that has already been processed is determined, and the processes of steps S7 to S9 are performed. If there remains a combination that has not been processed, the process proceeds to step S11. As described above, the combination of the colored particles capable of reproducing the tristimulus values (Ri, Gi, Bi) of one target color and the blending amount in the combination can be determined.

  In step S11, the processing apparatus 101 determines whether or not the processing in steps S6 to S9 has been performed for all the target colors determined in step S4. If there is a target color that has not been processed, the process returns to step S5, a target color other than the target color that has already been processed is selected, and the processes of steps S6 to S9 are performed. If there are no target colors that have not been processed, the process ends.

  By the above, the color of a base material, three types of colored particles, and the compounding quantity of a colored particle can be determined. Then, apply a paint that can reproduce the color of the base material, and then apply a paint for forming a multicolored pattern that is manufactured by mixing the determined colored particles with the vehicle component in the determined blending amount. For example, it is possible to form a multicolored paint film that matches the surrounding color. The mass ratio between the vehicle component and the entire colored particles is specified in the range of vehicle / colored particles = 60/40 to 70/30, and is usually 65/35. In the above, the color of the base material is determined to be the same tristimulus color as the surrounding color (see step S2), but the color of the base material can be determined by various methods as will be described later. .

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment.

  For example, regarding the method of acquiring color information in step S1, if the structure or the like to which the colorful pattern is applied is in the planning stage or the design stage, the tristimulus values of surrounding colors are acquired from the design drawing or CAD data. be able to. If the tristimulus value of the surrounding color is not directly known from the design drawing or CAD data, for example, if the color sample number of the surrounding color is known, the color sample identical to that color sample number is measured, and Similarly, tristimulus values can be acquired. When CAD data includes data relating to color, it is possible to calculate tristimulus values by performing arithmetic processing. In addition, although it is inferior in accuracy than the above, by comparing the color of the part to which the colorful pattern is applied with a plurality of color samples, that is, by visually observing and selecting a color sample that approximates the surrounding color, May be determined.

In addition, regarding the determination of the color of the base material in step S2, the color that appears to be the same color as the surrounding color or an approximate color can be set as the color of the base material. “The same color as the surrounding color” means a color having a color difference of 5 or less from the surrounding color in the L ^* a ^* b ^* color system as described above. Further, “a color approximate to the surrounding color” means a color having a color difference from 5 to 10 in the L ^* a ^* b ^* color system with a color difference from the surrounding color. In that case, in consideration of the material cost of the coating material forming the base material and the painting workability, a color approximate to the surrounding color can be determined as the color of the base material. For example, by using a color in which the saturation and brightness are slightly changed from those of the surrounding colors, there is an effect that it is easy to identify the site where the multicolored paint film is formed.

Also, by slightly increasing the brightness or lowering the saturation than the same color as the surrounding colors, the color of the base material is determined, and the amount of color pigments to be incorporated into the colored paint forming the base material is reduced. May be. Adjustment of the lightness and saturation of the base material can be carried out appropriately. For example the lightness can be increased by 5 to 10 of L ^* in the L ^* a ^* b ^* color system. Alternatively, the L ^* value to be increased may be changed in accordance with the surrounding L ^* value without making it a constant value. As for saturation, the C ^* value in the L ^* C ^* h color system can be lowered by 5-10, as opposed to making L ^* higher than the surrounding colors. The saturation of the base material may be changed in accordance with the surrounding C ^* value.

In addition, it is preferable to use tristimulus values of the L ^* a ^* b ^* color system and the L ^* C ^* h color system because they are close to visual sensations. Here, the tristimulus values of the L ^* a ^* b ^* color system and the L ^* C ^* h color system can be converted into sRGB values which are data formats in the sRGB space.

Further, the simultaneous equations for obtaining the blending amount of the colored particles are not limited to the equations 1 to 3 using the sRGB values, and simultaneous equations using the L ^* a ^* b ^* values obtained by converting the sRGB values can be used. In that case, the simultaneous equations may be determined with a color having a color difference of 1 or less from surrounding colors as a target color in the L ^* a ^* b ^* space. Since the L ^* a ^* b ^* space is suitable for visual sensation, it is more desirable to use the L ^* a ^* b ^* value in this way.

Moreover, the numerical value in said 2nd-4th conditions is not limited to said numerical value, It can set suitably. For example, the second condition is “the color difference from the surrounding color is 4 or more in the L ^* a ^* b ^* space”, and the third condition is “the blending amount of one kind of colored particles is 80% or more”. ”And the fourth condition may be“ the amount of one kind of colored particles is 10% or less ”. Moreover, it is not necessary to consider at least one of the third condition and the fourth condition.

In addition, the second condition is a condition that is limited to the same color as the surrounding color, which is desirable, but is not limited thereto. For example, the second condition may be a condition that allows a color that approximates the surrounding color, that is, “the color difference from the surrounding color is greater than 10 in the L ^* a ^* b ^* color system”. .

  Further, the flowchart of FIG. 3 can be executed with various modifications. For example, instead of first designating one target color and obtaining a blending amount for a combination of a plurality of colored particles, first, a combination of one colored particle may be designated and a blending amount may be obtained for a plurality of target values.

Moreover, you may perform the process (step S2) which determines the color of a base material, after performing the process (step S3-S11) which determines the compounding quantity of a colored particle. In that case, one combination used for the coating material for multicolor pattern formation is determined from the plurality of combinations (three kinds of colored particles) determined in steps S3 to S11, and an additive mixed color of the colored particles of the combination ( The same color as Ri, Gi, Bi) can be the color of the substrate. As described above, it is preferable to use the same color as the additive mixed color as the color of the base material, but a color that approximates the additive mixed color may be used as the color of the base material. Here, “the same color as the additive mixed color” means a color having a color difference of 5 or less from the additive mixed color in the L ^* a ^* b ^* color system, and “a color approximate to the additive mixed color” means In the L ^* a ^* b ^* color system, the color difference from the additive color mixture is greater than 5 and 10 or less.

  In addition, the case where the blending amount of the colored particles is calculated using a processing device such as a computer has been described. However, the present invention is not limited to this, and after obtaining measurement data, a person uses the measurement data to blend the colored particles. May be calculated.

  The following examples illustrate the features of the present invention more clearly.

  First, 18 kinds (N = 18 in Step S3) shown in Table 1 were prepared as colored particles to be blended in the colorful pattern forming paint, and each tristimulus value was measured.

In Table 1, the particle names of the colored particles are Z10 to Z28. The color of each colored particle was selected from the 2007 standard color for D version paint (hereinafter referred to as “Nippon Paint Color Sample”) issued by the Japan Paint Industry Association. Since the color of each colored particle is the same as that of the Nikkiso Color Sample, a sample of a standard color (pocket version) for 2007 D edition paint issued by the Japan Paint Industry Association was measured. For colorimetry, a spectrophotometer was used as illumination light under the conditions of a D65 light source, 45 ° irradiation, and 0 ° light reception. The obtained spectral reflectance was converted to a tristimulus value XYZ of a D65 light source and a 10-degree field, and then further converted to an L ^* a ^* b ^* value. The conversion matrix described in http://www005.upp.so-net.ne.jp/fumoto/linkp25.htp was used for conversion from XYZ values to sRGB values.

The surrounding color was D35-90A of a sun coating color sample. Similar to the above colored particles, the following L ^* a ^* b ^* values and sRGB values were obtained for the surrounding colors.
(L ^* , a ^* , b ^* ) = (92.14, 2.04, 4.94)
(R, G, B) = (231, 233, 220)
Next, using the colored particles z12, z17, and z26 in Table 1, the composition of the paint for forming a multicolor pattern that matches the surrounding colors was determined. Here, as a numerical value calculation method, a method described in “Algorithm Dictionary by JAVA” (Haruhiko Okumura et al., Technical Critics Inc., May 2003) was used. The tristimulus values (RGB values) of the colored particles z12, z17, and z26 were as follows.
(R, G, B) of z12 = (234, 190, 154)
z17 (R, G, B) = (158, 211, 178)
z26 (R, G, B) = (246, 247, 243)
As a result of substituting these values into the equations 1 to 3 and determining the blending amounts x, y and z of the colored particles z12, z17 and z26, x = 15 (mass%), y = 15 (mass%) ), Z = 70 (mass%) was obtained.

  When the observation distance is about 5 to 10 m, the color of the base material is D35-90A, which is the same color as the paint film obtained by applying the paint for forming the multicolor pattern having the composition obtained by calculation. It was.

  Furthermore, 3 types were selected from all 18 types of colored particles shown in Table 1 without duplication, and the formulation for producing a paint for forming a multicolored pattern was determined. That is, the above-described processing was performed for 816 combinations that select three types from 18 types. As a result, 20 combinations shown in Table 2 could be obtained. In addition, in order to exclude the coating material for forming a colorful pattern that cannot be actually manufactured or is not suitable, the above first to fourth conditions were applied.

In Table 2, the compounding quantity (weight%) of the colored particles 1-3 is represented by the compounding ratio 1-3 (the real number of 0-1). In Table 2, for example, the combination of the colored particles z10, z11, and z12 does not appear. However, in the case of the combination of the colored particles z10, z11, and z12, the combination of the colored particles z10, z11, and z12 The blending amounts are 3.8 mass%, -7.2 mass%, and 4.5 mass%, and the blending amount of z11 is a negative value (-7.2 mass%). Because you can't.

As a result of producing and applying a paint for forming a multicolored pattern with the blending amounts of each combination shown in Table 2, a multicolored paint film in harmony with the surrounding colors could be obtained. In Table 2, “predicted color difference” and “actually measured color difference” are color differences between surrounding colors (92.14, 2.04, 4.94) and various patterns in the L ^* a ^* b ^* color system, and specifically, “ The `` predicted color difference '' is a color difference obtained using the solution of the equation explained as the embodiment, and the `` measured color difference '' is a variety of colors formed by using a multicolor pattern forming paint manufactured using the solution of the equation as a blending amount. It is the color difference calculated | required using the value which measured the color of the pattern coating film.

  As an example, No. 1, no. FIG. 4 shows a photograph of the result of manufacturing and coating a paint for forming a multi-color pattern with a blending amount of 8 combinations. The left side of FIG. No. 1 is a multicolored paint film when the combination of colored particles is used. 8 is a multi-pattern coating film when a combination of 8 colored particles is used.

It is a schematic diagram which shows schematic structure of the system used for implementation of the determination method of the mixing | blending of the coating material for multicolor pattern formation which forms the multicolored paint film in harmony with the surrounding color which concerns on embodiment of this invention. It is the top view and sectional drawing which show a multicolor pattern coating film notionally. It is a flowchart which shows the determination method of the mixing | blending of the coating material for multicolor pattern formation which concerns on embodiment of this invention. It is an actual multicolored picture.

Explanation of symbols

101 Processing Device 102 Image Display Device 103 Measuring Device 104 Measurement Object

Claims (9)

A method for determining the composition of the multicolor pattern forming paint so that the multicolor pattern formed by coating the multicolor pattern forming paint on a colored substrate matches the surrounding color of the multicolor pattern,
The multicolor pattern-forming coating composition comprises a transparent coating film forming component and three kinds of colored particles,
A first step of determining a tristimulus value of the surrounding color or a tristimulus value approximate to the tristimulus value as a tristimulus value of a target color;
A second step of designating the color of each of the three types of colored particles;
Three solutions of the simultaneous equations with the tristimulus values of the target color as constants, the tristimulus values of the three types of colored particles as coefficients, and the blending amount of the colored particles as variables are obtained as three types of the colored particles. And a third step of determining the blending amount of each of the above. The first step is a step of determining, as a plurality of the target colors, a color that is the same as the tristimulus value of the surrounding color and a color that approximates the tristimulus value of the surrounding color,
The second step is a step of selecting three kinds of colored particles from a set of elements that associate the information for identifying the colored particles and the tristimulus values of the colored particles as elements and set the colored particles as a set,
Before the third step, further comprising a fourth step of selecting one target color from the plurality of target colors;
The third step uses the target color selected in the fourth step and the tristimulus values of three kinds of colored particles constituting the colored particle set selected from the set in the second step. The method for determining the composition of the paint for forming a multicolored pattern according to claim 1, wherein The third step includes
A fifth step of determining whether or not the three solutions of the simultaneous equations include negative values;
A multi-step according to claim 1, further comprising a sixth step of excluding the three solutions from the determined blending amount when the three solutions include negative values. A method for determining the composition of a paint for pattern formation. The third step includes
Whether or not the color difference in the L ^* a ^* b ^* space between the color represented by the tristimulus value obtained by substituting the three solutions of the simultaneous equation into the simultaneous equation and the surrounding color is 5 or more. A seventh step of determining;
The multicolored pattern according to any one of claims 1 to 3, further comprising an eighth step of excluding three solutions from the determined blending amount when the color difference is 5 or more. Method for determining formulation of forming paint. The third step includes
When the three solutions of the simultaneous equations are expressed in percentages, the method includes a ninth step of excluding the three solutions from the determined blending amount if a solution of 90% or more is included. The determination method of the mixing | blending of the coating material for multicolor pattern formation of any one of Claims 1-4. The third step includes
When the three solutions of the simultaneous equations are expressed as percentages, a tenth step of excluding the three solutions from the determined blending amount is included if a solution of 5% or less is included. The determination method of the mixing | blending of the coating material for multicolor pattern formation of any one of Claims 1-5. 7. The eleventh step of further determining an color having a color difference of 10 or less from the surrounding colors in the L ^* a ^* b ^* color system as the color of the base material. A method for determining the composition of the paint for forming a multicolor pattern according to claim 1. Repeatedly executing the first to fourth steps,
One colored particle set is determined from the colored particle set for which the blending amount has been determined, and the tristimulus values of the three types of colored particles constituting the colored particle set and the three corresponding to the three types of the colored particles. The paint for forming a multicolored pattern according to claim 2, further comprising a twelfth step of determining, as the color of the base material, a color that is the same as or similar to an additive mixed color obtained by using the two blending amounts. How to determine the formulation of The multi-color pattern forming paint is executed by a computer equipped with a recording means, so that the multi-color pattern formed by coating the multi-color pattern forming paint on the colored base material matches the surrounding color of the multi-color pattern. A program for determining the composition,
The multicolor pattern-forming coating composition comprises a transparent coating film forming component and three kinds of colored particles,
In the computer,
A first function of determining tristimulus values of the surrounding colors and tristimulus values approximate to the tristimulus values as tristimulus values of a plurality of target colors;
A second function of selecting three kinds of colored particles from the database recorded in the recording means in association with the information for identifying the colored particles and the tristimulus values of the colored particles to be the target colored particles;
A third function for selecting one target color from the plurality of target colors determined by the first function;
Solving simultaneous equations with the tristimulus values of the selected target color as constants, the tristimulus values of the three types of target colored particles as coefficients, and the blending amount of the three types of target colored particles as variables And determining the obtained solution as a blending amount of the target colored particles, and realizing a fourth function of recording in the recording means in correspondence with information for specifying the target colored particles. A program for determining the formulation of paints.