Facsimile and static presentation processing – Natural color facsimile – Color correction
Patent
1995-12-04
1998-10-06
Moore, David K.
Facsimile and static presentation processing
Natural color facsimile
Color correction
358518, G03F 308
Patent
active
058186131
ABSTRACT:
A system and method for converting a color represented in a first color space to the color represented in a second color space uses a constant hue algorithm. The constant hue algorithm is used to compensate invalid colors in the second color space obtained as a result of the conversion. The constant hue algorithm determines a compensation factor that, in effect, blends the invalid color with pure grey until the invalid color becomes a valid color in the second color space. The compensation factor is optionally stored with the valid color in the second color space so that the original color in the first color space can be subsequently recovered.
REFERENCES:
patent: 4670780 (1987-06-01), McManus et al.
patent: 4941038 (1990-07-01), Walowit
patent: 5448379 (1995-09-01), Ishihara et al.
patent: 5448380 (1995-09-01), Park
patent: 5483360 (1996-01-01), Rolleston et al.
Poynton, "Colorspace-faq --FAQ about Colour and Gamma," published on the internet at http://www.inforamp.net/.sup..about. poynton/Poynton-colour.html, sections G-0 -G-19 and C-1 --C-47, May 28, 1995.
Poynton, "Poynton's Colour FAQ," sections 0 -47, May 27, 1995.
Goldberg Edward
Jerian Charles
Masterson Anthony
Williams Robert A.
Brinich Stephen
Moore David K.
Silicon Graphics Inc.
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