Intent preservation when constructing measurement-based color transforms from transform-based profiles

A computer readable storage medium storing a computer-executable color management program, the color management program being executable by a computer so as to control the computer to perform a method for using a rendering model encapsulated in a transform-based profile in a measurement-based color management system (MBCMS), the method comprising:

• converting a predetermined collection of source device color values to generate perceptually rendered values using the rendering model encapsulated in a perceptual transform of the transform-based color profile;
• converting the perceptually rendered values to generate perceptually rendered appearance values of a color appearance space using predefined viewing conditions;
• mapping the generated appearance values to generate destination device color values within a color gamut of a destination device using a gamut mapping model, wherein the gamut mapping model uses a perceptual intent reference medium gamut (PRMG) boundary description and a gamut boundary description of the destination device to perform the mapping, wherein the PRMG represents the color gamut of an idealized medium;
• constructing a measurement-based color transform from the predetermined collection of source device color values and the corresponding destination device color values generated by the gamut mapping model;
• and
• converting color values of an image generated by the source device to color values of the destination device using the constructed transform.

A color management apparatus comprising:

• a storage device;
• and
• a processor coupled to the storage device,
• wherein the processor executes a computer-executable color management program stored on the storage device, the color management program being executable by the processor so as to control the color management apparatus to perform a method for using a rendering model encapsulated in a transform-based profile in a measurement-based color management system (MBCMS), the method comprising:
• converting a predetermined collection of source device color values to generate perceptually rendered values using the rendering model encapsulated in a perceptual transform of the transform-based color profile;
• converting the perceptually rendered values to generate perceptually rendered appearance values of a color appearance space using predefined viewing conditions;
• mapping the generated appearance values to generate destination device color values within a color gamut of a destination device using a gamut mapping model, wherein the gamut mapping model uses a perceptual intent reference medium gamut (PRMG) boundary description and a gamut boundary description of the destination device to perform the mapping, wherein the PRMG represents the color gamut of an idealized medium;
• constructing a measurement-based color transform from the predetermined collection of source device color values and the corresponding destination device color values generated by the gamut mapping model;
• and
• converting color values of an image generated by the source device to color values of the destination device using the constructed transform.