Image processing apparatus, image processing method, and medium

A non-transitory computer-readable medium storing at least one program for causing, when executed by a computer, the computer to:

• obtain image data that is defined as a first color gamut,
• execute transformation processing for transforming the image data into image data that is defined as a second color gamut that is different from the first color gamut, using color transformation information, and
• when, as a result of transformation processing that uses first color transformation information, a first pair of color values included in the image data is transformed into a second pair of color values that have a color difference that is not perceived as different colors, generate second color transformation information such that the first pair of color values is transformed into a third pair of color values that have a color difference that is perceived as different colors as a result of performing transformation processing that uses the second color transformation information,
• wherein a saturation difference of the third pair of color values is larger than a saturation difference of the second pair of color values.

An image processing method that is executed by an image processing apparatus, the method comprising:

• obtaining image data that is defined as a first color gamut;
• executing transformation processing for transforming the image data into image data that is defined as a second color gamut that is different from the first color gamut, using color transformation information;
• and
• when, as a result of transformation processing that uses first color transformation information, a first pair of color values included in the image data is transformed into a second pair of color values that have a color difference that is not perceived as different colors, generating second color transformation information such that the first pair of color values is transformed into a third pair of color values that have a color difference that is perceived as different colors as a result of performing transformation processing that uses the second color transformation information,
• wherein a saturation difference of the third pair of color values is larger than a saturation difference of the second pair of color values.