Image processing apparatus, image processing method, and storage medium for color matching

摘要

There is provided an image processing apparatus comprising: a common color reproduction range generation unit configured to select the data of interest as common color reproduction range data if the data of interest is determined by the first color reproduction range determination unit to fall within the color reproduction range of the first output device and is determined by the second color reproduction range determination unit to fall within the color reproduction range of the second output device; and a table correction unit configured to correct output values for respective grid points of a first color conversion table included in the image processing apparatus in accordance with differences between the reference values and the colorimetric values corresponding to the common color reproduction range data.

主权项

1. An image processing apparatus comprising:
a first color reproduction range acquisition unit configured to acquire first color reproduction range data which represents a color reproduction range of a first output device; a first color reproduction range determination unit configured to determine based on the first color reproduction range data whether or not data of interest on a device-independent color space falls within the color reproduction range of the first output device; a second color reproduction range acquisition unit configured to acquire second color reproduction range data which represents a color reproduction range of a second output device; a second color reproduction range determination unit configured to determine based on the second color reproduction range data whether or not the data of interest falls within the color reproduction range of the second output device; a common color reproduction range generation unit configured to select the data of interest as common color reproduction range data if the data of interest is determined by the first color reproduction range determination unit to fall within the color reproduction range of the first output device and is determined by the second color reproduction range determination unit to fall within the color reproduction range of the second output device; a colorimetric value acquisition unit configured to acquire colorimetric values of an image which is output from the first output device using the common color reproduction range data; a reference value acquisition unit configured to acquire, as reference values, colorimetric values of an image which is output from the second output device using the common color reproduction range; a table correction unit configured to correct output values for respective grid points of a first color conversion table included in the image processing apparatus in accordance with differences between the reference values and the colorimetric values corresponding to the common color reproduction range data, wherein the first color conversion table indicates a correspondence from a device-independent color space to a device-dependent color space; and a table generation unit configured to set conversion results of data which represent grid points of a third color conversion table as output values for the grid points of the third color conversion table, wherein the conversion result is obtained by performing conversion using a second color conversion table included in the image processing apparatus and the first color conversion table corrected by the table correction unit, wherein the second color conversion table indicates a correspondence from the device-dependent color space to the device-independent color space, and wherein the third color conversion table is used to correct image data to be output on the device-dependent color space.