System and method for performing dithering with a graphics unit

Details System and method for performing dithering with a graphics unit System and method for performing dithering with a graphics unit

1998-05-14

2000-11-28

Hjerpe, Richard A.

Computer graphics processing and selective visual display system

Display peripheral interface input device

345154, 345147, 345149, 358455, 358456, 358457, G09G 504, G09G 510, H04N 140

Patent

active

061541958

ABSTRACT:
A dither unit preferably comprises an offset generator, an adjusted coordinate generator and a dither matrix. The offset generator is coupled to receive information about the relative position of the sub-sample being dithered, and in response generates offset values. The output of the offset generator along with the pixel coordinates are provided to the adjusted coordinate generator which generates adjusted coordinate values used by the dither matrix. The adjusted coordinate values along with a color value are received by the dither matrix, which in response, generates a dithered value for the sub-sample that can be stored back in the over sampling buffer for additional computation.

REFERENCES:
patent: 4612540 (1986-09-01), Pratt
patent: 5278670 (1994-01-01), Eschbach
patent: 5734369 (1998-03-01), Priem et al.
patent: 5777599 (1998-07-01), Poduska, Jr.

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