Color area compression method and apparatus

Details Color area compression method and apparatus Color area compression method and apparatus

1996-09-25

1999-08-03

Coles, Edward L.

Facsimile and static presentation processing

Natural color facsimile

358500, 358518, 358515, 358501, H04N 146, G03F 308

Patent

active

059332530

ABSTRACT:
A gamut compression method and apparatus for a color DTP system in which more natural-looking color regeneration is achieved in consideration of the difference in gamut from one device to another. If the gamut of the output system GMout is smaller than that of the input system GMin, the gamut of the input system is divided into four portions in a two-dimensional plane of lightness and chroma, under a constant color hue, using two straight line segments, and gamut compression is done by varying the compressing direction for each area, so that the color in the gamut of the input system will be converted into the color in the gamut of the output system.

REFERENCES:
patent: 5363218 (1994-11-01), Hoshino
patent: 5734745 (1998-03-01), Ohneda

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