Patent ID: 8818084

Claim:
A color processing apparatus comprising: a first memory which stores a table for each image capturing device capturing a chart, wherein the table records a relationship between image data of patches included in the chart, which are acquired by capturing the chart under a plurality of light sources having different characteristics, and the characteristics of the plurality of light sources; a first input section configured to input, as estimation conditions, specifying information of an image capturing device used to estimate characteristics of illumination light, and a print condition of a chart used to estimate the characteristics of the illumination light; a second input section configured to input image data of the chart, which is captured by the image capturing device under the illumination light; an estimation section configured to estimate the characteristics of the illumination light from the table corresponding to the estimation conditions, and the input image data; a second memory which stores a color conversion matrix corresponding to a combination of specifying information of an image capturing device and characteristics of illumination light, and device values of respective patches included in a chart; a converter configured to convert image data of a plurality of patches included in the input image data into color values using the color conversion matrix corresponding to a combination of the input specifying information and the estimated characteristics; and a first generator configured to generate a color conversion table indicating a relationship between the color values of the plurality of patches and device values of respective patches included in a chart corresponding to the input print condition.