Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1998-03-02
1999-07-27
Shankar, Vijay
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345131, 345133, 345154, 345155, G09G 500, G09G 536, G09G 504
Patent
active
059298375
ABSTRACT:
A method and apparatus for determining representative values for the chrominance components to be associated with a plurality of luminance components in a horizontally shrunken or stretched image for graphics controllers wherein display image data is stored in a buffer memory in a form associating a single set of U and V chrominance components with a plurality of Y luminance values. For a four to one shrinkage of an image in a format associating one set of chrominance components with four pixel luminance values wherein each pixel luminance value in the shrunken image initially has as associated set of chrominance components U.sub.0, U.sub.1, U.sub.2 and U.sub.3 and V.sub.0, V.sub.1, V.sub.2 and V.sub.3, the multiple values of the chrominance components are sequentially accumulated in a 3/4:1/4 ratio in such a manner as to provide an approximate average value for U and V for each set of four pixel luminance values in the shrunken image. Circuitry for processing the chrominance components making use of interpolation circuitry already used for interpolation between pixels for a stretched image is disclosed.
REFERENCES:
patent: 4315278 (1982-02-01), Pasdera
patent: 4491861 (1985-01-01), Sochov
patent: 4707729 (1987-11-01), Bruno et al.
patent: 4752983 (1988-06-01), Guttag et al.
patent: 5003299 (1991-03-01), Batson
patent: 5081450 (1992-01-01), Lucas et al.
patent: 5170152 (1992-12-01), Taylor
patent: 5202756 (1993-04-01), Sasaki et al.
patent: 5402513 (1995-03-01), Schafer
patent: 5469190 (1995-11-01), Masterson
patent: 5506621 (1996-04-01), Ogasawara et al.
patent: 5625379 (1997-04-01), Reinert et al.
Till, John. "Modem Manager Monitors a Variety of Devices." Electonic Design. vol. 36, No. 13, Jun. 22, 1989. Cleveland, Ohio. pp. 123-124.
Bonnelycke Mark Emil
Hasz Vernon Dennis
Mills Karl Scott
Owen Richard Charles Andrew
Blakely, Jr. Roger W.
Cirrus Logic Inc.
Shankar Vijay
Shaw Steven A.
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