ICC consistent chromatic adaptation

A computer system for providing consistent chromatic adaptation for a workflow comprising a sequence of a plurality of International Color Consortium (ICC) profiles, each ICC profile comprising a profile header and a plurality of tags, the system comprising:

• a profile identifying component for identifying ICC profiles within the workflow that require chromatic adaptation;
• a control profile identifying component for identifying one of the plurality of ICC profiles that require chromatic adaptation as a control profile;
• a target determining component for determining a target cone matrix and target cone white points from the control profile, the target cone white points comprising a target profile connection space (PCS) cone white point and a target device source cone white point, wherein the target determining component determines a target cone matrix and target cone white points from the control profile by
• extracting a chromatic adaptation matrix from a chad tag within the control profile;
• extracting a PCS XYZ white point from the profile header of the control profile;
• determining whether the control profile has a tag from which a device source XYZ white point may be extracted;
• if the control has a tag from which a device source XYZ white point may be extracted, extracting the device source XYZ white point from the tag within the control profile;
• if the control profile does not have a tag from which a device source XYZ white point may be extracted, determining the device source XYZ white point using the chromatic adaptation matrix and the PCS XYZ white point;
• and
• determining the target cone matrix and target cone white points using the chromatic adaptation matrix, the PCS XYZ white point, and the device source XYZ white point;
• and
• a conversion component for converting color data for each ICC profile identified as requiring chromatic adaptation using the target cone matrix and target PCS cone white point, wherein said converting comprises
• reversing a chromatic adaptation previously applied to color data associated with each ICC profile identified as requiring chromatic adaptation, and
• applying a new chromatic adaptation to color data associated with each ICC profile identified as requiring chromatic adaptation using a chromatic adaptation matrix computed based on the target cone matrix and target cone white points from the control profile.

One or more computer-readable storage media having computer-useable instructions embodied thereon for performing a method for providing consistent chromatic adaptation for a workflow comprising a sequence of a plurality of International Color Consortium (ICC) profiles, each ICC profile comprising a profile header and a plurality of tags, the method comprising:

• identifying one of the plurality of ICC profiles as a control profile to define a standard chromatic adaptation method for use in conversion of color data of one or more of the plurality of ICC profiles;
• determining a chromatic adaptation method employed by the control profile, wherein determining a chromatic adaptation method includes,
• extracting a chromatic adaptation matrix from a chad tag within the control profile,
• extracting a profile connection space (PCS) XYZ white point from the profile header of the control profile,
• determining whether the control profile has a tag from which a device source XYZ white point may be extracted,
• if the control has a tag from which a device source XYZ white point may be extracted, extracting the device source XYZ white point from the tag within the control profile,
• if the control profile does not have a tag from which a device source XYZ white point may be extracted, determining the device source XYZ white point using the chromatic adaptation matrix and the PCS XYZ white point, and
• determining a target cone matrix and target cone white points using the chromatic adaptation matrix, the PCS XYZ white point, and the device source XYZ white point, the target cone white points comprising a target PCS cone white point and a target device source cone white point;
• identifying ICC profiles within the workflow that require chromatic adaptation;
• and
• converting color data associated with each ICC profile identified as requiring chromatic adaptation using the chromatic adaptation method employed by the control profile, wherein said converting comprises
• reversing a chromatic adaptation previously applied to color data associated with each ICC profile identified as requiring chromatic adaptation, and
• applying a new chromatic adaptation to color data associated with each ICC profile identified as requiring chromatic adaptation using a chromatic adaptation matrix computed based on the chromatic adaptation method of the control profile.