Patent ID: 8681401

Claim:
A method for compensating for effects of illumination when comparing soft proofs to hard copy proofs viewed under a first illumination comprising: obtaining, for a set of print colors, device-independent color (DIC) data corresponding light reflected from the set of print colors under standard illumination; obtaining, for the set of print colors, DIC data that corresponds light reflected from the set of print colors under the first illumination; obtaining, for a set of colors emitted from a display, DIC data that corresponds to the light emitted by the display, wherein RGB values for the set of colors emitted are calculated from the print colors under standard illumination and from a non-adjusted standard illumination display profile; adjusting the standard illumination display profile to reduce a measured error between light reflected from the set of print colors under the first illumination and light emitted for the display; estimating DIC data produced by the display when rendering the print colors based on the adjusted profile; calculating differences between the estimated DIC data and the DIC data for light reflected from the set of print colors under corresponding to the first illumination; and further adjusting the display profile to reduce the differences.