Computer graphics processing and selective visual display system – Display peripheral interface input device
Patent
1997-11-17
2000-04-04
Nuynh, Ba
Computer graphics processing and selective visual display system
Display peripheral interface input device
345431, 355 32, 358518, 358527, 382167, 430359, G06F 1500, G03F 308
Patent
active
060467231
ABSTRACT:
A method for achieving color-appearance matching for an image viewed in different surround conditions, the method comprises the steps of forming signals representing an original image; and 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 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 an 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 an 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 an dark surround; and substantially a range of 1.01 to 1.21 for an original image viewed in an dim surround to a reproduced image to be viewed in an dark surround for achieving color-appearance matching of a reproduced image to the original image.
REFERENCES:
patent: 5447811 (1995-09-01), Buhr et al.
patent: 5528339 (1996-06-01), Buhr et al.
"The Reproduction of Colour" by Dr. R. W. G. Hunt, fifth edition, 1995, p. 5.
Daniels Cathleen M.
Fairchild Mark D.
Giorgianni Edward J.
Eastman Kodak Company
Nuynh Ba
Watkins Peyton C.
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