Patent
1992-10-21
1995-05-02
Herndon, Heather R.
G06T 520
Patent
active
054127661
ABSTRACT:
A personal computer system has source of input video data containing digitized pixel color values, and a display operated with palette quantized colors including non-linear palette quantized colors. A conversion table is stored in the system for converting blocks of pixel color values into palette colors, the conversion table comprising a plurality of error diffusion arrays covering the color range of pixel color values. Each array in the conversion table corresponds to a different color value, each array being accessed using said corresponding color value as an index into said table. Each array in the table has "n" fields respectively containing palette color values ordered in accordance with an order matrix by sorted luminance values.
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patent: 5298893 (1994-03-01), Sekine
Computers & Graphics, Sudhir S. Dixit, 1991, vol. 15, No. 4, pp. 561-567, Quantization of Color Images for Display/Printing on Limited Color Output Devices * pp. 563-564; FIGS. 2, 3, 4 *.
Systems and Computers in Japan, Watanabe, 1990, vol. 21, No. 10, New York, USA, pp. 68-77, Improved Dithering Methods for Color Quantized Images * the whole document *.
Pietras Mark A.
Rodriguez Arturo A.
Bogdon Bernard D.
Herndon Heather R.
International Business Machines - Corporation
Smith Mike
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