Color management for limited gamut devices

A method to prepare data for performing color manipulation on a digital processing system, the method comprising:

• determining whether or not a real gamut of a device is poor in quality;
• defining a virtual gamut of the device if a real gamut of the device is poor in quality;
• storing a color profile specifying the virtual gamut for the device;
• and
• generating color data to control the device using the color profile, wherein the generation of the color data is independent of the real gamut of the device, and wherein the virtual gamut substitutes for the poor quality real gamut during subsequent color manipulation.

A computer readable medium containing profile data of a device for performing color manipulation on a digital processing system, said profile data produced by a method comprising:

• determining whether or not a real gamut of the device is poor in quality;
• computing a virtual gamut of the device from an interpolation using a threshold gamut and a limit gamut in a chromaticity diagram after a determination that the real gamut of the device is poor in quality;
• and
• storing a color profile specifying the virtual gamut for the device;
• and
• generating color data to control the device using the color profile, wherein the generation of the color data is independent of the real gamut of the device, and wherein the virtual gamut substitutes for the poor quality real gamut during subsequent color manipulation.

A computer readable medium containing executable computer program instructions which when executed by a digital processing system cause said system to perform a method for color manipulation, the method comprising:

• maintaining one or more color profiles for a device having a real gamut, each color profile specifying one gamut for the device;
• determining a virtual gamut for the device from the one or more color profiles maintained, wherein the virtual gamut is substituted for the real gamut for the device if the real gamut is poor in quality;
• and
• generating color data to control the device using a color profile specifying the virtual gamut, wherein the generation of the color data is independent of the real gamut of the device.

A computer readable medium containing executable computer program instructions which when executed by a digital processing system cause said system to perform a method to prepare data for performing color manipulation, the method comprising:

• determining whether or not a real gamut of a device is poor in quality;
• and
• defining a virtual gamut of the device if a real gamut of the device is poor in quality;
• and
• storing a color profile specifying the virtual gamut for the device;
• and
• generating color data to control the device using the color profile, wherein the generation of the color data is independent of the real gamut of the device, and wherein the virtual gamut substitutes for the poor quality real gamut during subsequent color manipulation.

A digital processing system for color manipulation, the digital processing system comprising:

• means for maintaining one or more color profiles for a device having a real gamut, each color profile specifying one gamut for the device;
• means for determining a virtual gamut for the device from the one or more color profiles maintained, wherein the virtual gamut is substituted for the real gamut for the device if the real gamut is poor in quality;
• and
• means for generating color data to control the device using a color profile specifying the virtual gamut, wherein the generation of the color data is independent of the real gamut of the device.

A digital processing system method to prepare data for performing color manipulation, the digital processing system comprising:

• means for determining whether or not a real gamut of a device is poor in quality;
• means for defining a virtual gamut of the device if a real gamut of the device is poor in quality;
• and
• means for storing a color profile specifying the virtual gamut for the device;
• and
• means for generating color data to control the device using the color profile, wherein the generation of the color data is independent of the real gamut of the device, and wherein the virtual gamut substitutes for the poor quality real gamut during subsequent color manipulation.