Construction of colorimetric measurements from device profile of spectral measurements

A device model object for providing colorimetric measurements to a color management module, comprising:

• accessing means for accessing a spectrally-based device profile of a device, wherein the device profile contains spectral measurements that characterize the device;
• receiving means for receiving a request from the color management module for a device profile, wherein the request is for spectral measurements or for colorimetric measurements;
• determining means for determining whether colorimetric measurements have been previously constructed;
• constructing means for constructing colorimetric measurements through numerical integration of the spectral measurements contained in the spectrally-based device profile and a viewing condition white point, and for caching the constructed colorimetric measurements;
• and
• providing means for providing a device profile to the color management module in response to a request from the color management module;
• wherein responsive to a request for spectral measurements, the device profile contains the spectral measurements that characterize the device;
• wherein responsive to a request for colorimetric measurements in a case where a determination is made that the colorimetric measurements have been previously constructed, the device profile contains the cached constructed colorimetric measurements;
• and
• wherein responsive to a request for colorimetric measurements in a case where a determination is made that the colorimetric measurements have not been previously constructed, the colorimetric measurements are constructed using the constructing means, and the device profile contains the constructed colorimetric measurements.