JP2009130847A5

JP2009130847A5 -

Info

Publication number: JP2009130847A5
Application number: JP2007306311A
Authority: JP
Filing date: 2007-11-27
Publication date: 2011-01-20
Anticipated expiration: 2027-11-27

Claims

A color processing device that creates a color separation table for a printing device that performs printing with a plurality of inks,
Input means for inputting print color information obtained by measuring the color of the patch image output from the printing apparatus;
Reference table acquisition means for acquiring a color separation table prepared in advance as a reference table;
From the reference table, the ink value extracting means for extracting Lee ink values constituting the color space,
Based on the printing color information obtained by the input means, and the color predicting means for estimating the color predicting print color information corresponding to the i ink value,
As printing color information the estimated approaches the predetermined target color, and optimization means for updating the i ink value,
Based on the i ink values the update, anda color separation table creation means for creating the color separation table,
The color predicting means includes
A color processing apparatus that assumes a plurality of printer models having a smaller number of inks than the printing apparatus and performs the color prediction in units of the printer models.

The color predicting means, according to the Lee ink value has a printer model selection means for selecting the printer model, further each said printer model,
Acquires surrounding grid points of the i ink value, and means for obtaining surrounding grid points,
Among the acquired peripheral grid points, grid point estimation means for estimating print color information for peripheral grid points for which print color information has not been obtained in the input step;
Based on the printing color information of the surrounding grid points, the print color information estimating means for estimating a print color information corresponding to the i ink value,
The color processing apparatus according to claim 1, further comprising:

The ink value is an ink value of a frame constituting the color space;
The color processing apparatus according to claim 2, wherein the printer model selection unit selects a printer model having the smallest number of inks among printer models that use all of the ink used indicated by the ink value of the frame. .

The ink value is an ink value of a frame constituting the color space;
The color processing apparatus according to claim 2, wherein the printer model selection unit selects a printer model previously associated with the frame.

The color prediction unit further includes a holding unit that holds the print color information, and the holding unit is shared by the plurality of printer models. The color processing apparatus as described.

The color processing apparatus according to claim 1, wherein the print color information is spectral reflectance information.

7. The patch image according to claim 1, wherein a predetermined number of patches are set in the patch image in accordance with a priority order based on a reference table acquired by the reference table acquisition unit. The color processing apparatus as described.

The color processing apparatus according to claim 1, wherein the color prediction unit performs the color prediction in units of the printer model in time parallel.

The color processing apparatus according to claim 8, wherein the color prediction unit performs the color prediction in time parallel in units of combinations corresponding to the number of inks used in the printer model.

A color processing method for creating a color separation table for a printing apparatus that performs printing with a plurality of inks,
An input step of inputting print color information obtained by measuring the patch image output from the printing apparatus;
A reference table acquisition step of acquiring a color separation table prepared in advance as a reference table;
From the reference table, the ink value extracting a Lee ink values constituting the color space,
Based on the printing color information obtained by the input step, a color prediction estimating the color predicting print color information corresponding to the i ink value,
As printing color information the estimated approaches the predetermined target color, and optimization updating the i ink value,
Based on the i ink values the update, anda color separation table generation step of generating the color separation table,
In the color prediction step,
A color processing method characterized by assuming a plurality of printer models having a smaller number of inks than the printing apparatus and performing the color prediction in units of the printer models.

A computer program that causes a computer to function as each unit of the color processing apparatus according to any one of claims 1 to 9 by being read and executed by the computer.

A computer-readable recording medium on which the computer program according to claim 11 is recorded.