Computer graphics processing and selective visual display system – Display peripheral interface input device
Patent
1995-12-29
1997-09-30
Tung, Kee M.
Computer graphics processing and selective visual display system
Display peripheral interface input device
345150, 345152, 345154, 345155, 345199, 395131, B09G 504
Patent
active
056730659
ABSTRACT:
A color image signal is reduced and converted. Dithering the remainder is an embodiment. For example a pixel value is separated into its pixel components. Each component is further split into most-significant bit (MSB) and least-significant bit (LSB) parts. The MSBs from each component are combined to provide a color number. The color number is an index to a nearest-color map. Each entry in the nearest-color map is an index to a spectrum color palette having color entries. The spectrum color palette is an evenly divided spectrum of the colors displayable on an associated video display system. The particular color accessed in the color spectrum palette by the color palette is used for the pixel in the image being reduced and converted. In an embodiment, the LSBs of each color component are dithered. If the value of the LSBs of a color component are greater than a dither threshold value, a one is added to the MSBs of the color, prior to the MSB values being combined into the color number.
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Intel Corporation
Kovalick Vincent E.
Murray William H.
Tung Kee M.
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