Method for creating proof image data, proof image data creation apparatus, and computer program

Abstract

This technology provides the ability to generate proof image data that reproduces the print observed when using a backing of any color on a sheer printed fabric. [Solution] The disclosed method includes (a) acquiring basic proof image data for reproducing the color of a basic printed material with a basic backing applied to a translucent printed fabric; (b) acquiring texture information of the translucent fabric; (c) acquiring a basic backing color and an observation backing color; (d) creating foreground proof image data by removing the basic backing color from the basic proof image data; and (e) creating observation proof image data by combining the observation backing color with the foreground proof image data.

Claims

1. A method for creating proof image data, (a) A process to acquire basic proof image data for reproducing the color of a basic printed material, which is obtained by applying a basic backing to a translucent printed fabric on which an image has been printed using a printing press, using a proof output device, (b) A step of acquiring texture information of the transparent fabric, (c) A step of obtaining a basic backing color, which is the color of the basic backing, and an observation backing color, which is the color of the observation backing used in the observation environment of the transparent printed fabric, (d) A step of creating foreground color proof image data that represents the color of the translucent printed fabric as observed without backing by performing a color correction process to remove the basic backing color from the color represented by the basic proof image data according to the texture information, (e) A step of creating observation proof image data representing the color of an observation print made by applying the observation backing to the transparent print fabric by performing a synthesis process that combines the observation backing color with the color represented by the foreground proof image data according to the texture information, Methods that include...

2. The method according to claim 1, The aforementioned step (d) is, (d1) A step of determining the basic mixing ratio of the basic backing color when the color of the basic printed material is considered to be a mixture of the color of the transparent printed fabric and the basic backing color, according to the texture information, (d2) A step of creating foreground color proof image data by performing a calculation to remove the basic backing color from the color represented by the basic proof image data according to the basic color mixing ratio, Methods that include...

3. The method according to claim 1, The aforementioned basic proof image data is data represented in the output color space of the proof output device. The aforementioned step (d) is, (d1) A step of determining the basic mixing ratio of the basic backing color when the color of the basic printed material is considered to be a mixture of the color of the transparent printed fabric and the basic backing color, according to the texture information, (d2) A step of generating a color correction media profile for the translucent fabric without using the basic backing by performing a profile conversion on the media profile of the printing press for the translucent fabric using the basic backing color and the basic color mixing ratio, (d3) A step of creating foreground color proof image data by performing a color management process that converts the basic proof image data into a device-independent color space using the color correction media profile, Methods that include...

4. The method according to claim 2 or 3, The texture information includes the transparency characteristics information of the transparent fabric and the texture value for each pixel. The aforementioned step (d1) is, (d1-1) Using the transparency characteristic information, a step of determining the pixel background reference rate, which is the percentage of each pixel that references the backing color, according to the texture value, (d1-2) A step of determining the basic color mixing ratio as a value proportional to either the average background reference rate obtained by averaging the pixel background reference rates within the image area of ​​the basic proof image data, or the pixel background reference rate. Methods that include...

5. The method according to claim 4, The aforementioned transmission characteristics information is A yarn texture threshold for determining that each pixel corresponds to a thread of the transparent fabric, A gap texture threshold for determining that each pixel corresponds to a gap in the weave of the transparent fabric, The yarn background reference rate is the percentage of pixels corresponding to the yarn that reference the backing color, The gap background reference rate is the ratio to which the backing color is referenced in the pixels corresponding to the gap, Includes, The method includes a step (d1-1) of determining the pixel background reference rate according to the texture value using a background reference rate determination curve determined by the thread texture threshold, the gap texture threshold, the thread background reference rate, and the gap background reference rate.

6. The method according to claim 4, The aforementioned step (e) is, (e1) A step of determining an observed color mixing ratio that is proportional to either the average background reference ratio or the pixel background reference ratio, (e2) A step of creating the observation proof image data by performing a calculation to combine the observation backing color with the color represented by the basic proof image data according to the observation color mixing ratio, Methods that include...

7. A proof image data creation device, A basic proof image acquisition unit acquires basic proof image data for reproducing the color of a basic printed material, which is obtained by applying a basic backing to a transparent printed fabric on which an image has been printed using a printing press, using a proof output device. A texture information acquisition unit that acquires texture information of the transparent fabric, A backing color information acquisition unit acquires the basic backing color, which is the color of the basic backing, and the observation backing color, which is the color of the observation backing used in the observation environment of the transparent printed fabric. A color correction unit creates foreground color proof image data representing the color of the translucent printed fabric as observed without backing by performing a color correction process to remove the basic backing color from the color represented by the basic proof image data according to the texture information, A synthesis unit creates observation proof image data representing the color of an observation print with the observation backing applied to the transparent print fabric by performing a synthesis process that combines the observation backing color with the color represented by the foreground proof image data according to the texture information, A proof image data creation device equipped with the following features.

8. A computer program that creates proof image data, (a) A process to acquire basic proof image data for reproducing the color of a basic printed material, which is obtained by applying a basic backing to a translucent printed fabric on which an image has been printed using a printing press, using a proof output device, (b) A process for obtaining the texture information of the transparent fabric, (c) A process for obtaining the basic backing color, which is the color of the basic backing, and the observation backing color, which is the color of the observation backing used in the observation environment of the transparent printed fabric. (d) A process to create foreground color proof image data representing the color of the translucent printed fabric as observed without backing, by performing a color correction process to remove the basic backing color from the color represented by the basic proof image data according to the texture information, (e) A process to create observation proof image data representing the color of an observation print with the observation backing applied to the transparent print fabric by performing a synthesis process to combine the observation backing color with the color represented by the foreground proof image data according to the texture information, A computer program that causes a computer to execute a command.

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