Patent Document ID: 6046723
Application ID: 08972115
Patent Status: 1

Claim One:
1. A method for achieving color-appearance matching for an image to be viewed in different surrounds, the method comprising the steps of: (a) Forming signals representing an original image; and (b) mapping the original image signals through a transformation that alters image luminance contrast by a factor of substantially 1.01 to 1.15 for an original image viewed in a light surround to a reproduced image to be viewed in an average surround; substantially 1.01 to 1.22 for an original image viewed in a light surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.29 for an original image viewed in a light surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.11 for an original image viewed in an average surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.22 for an original image viewed in an average surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.21 for an original image viewed in a dim surround to a reproduced image to be viewed in a dark surround; substantially a range of 0.87 to 0.99 for an original image viewed in an average surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in a light surround; substantially a range of 0.90 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in an average surround; substantially a range of 0.78 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in an average surround; and substantially a range of 0.83 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a dim surround for achieving color-appearance matching of a reproduced image to the original image.