Three-dimensional displaying apparatus having frame buffer and d

Details Three-dimensional displaying apparatus having frame buffer and d Three-dimensional displaying apparatus having frame buffer and d

1995-10-20

1998-09-15

Nguyen, Phu K.

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

G06F 1500

Patent

active

058086188

ABSTRACT:
A depth buffer in a three-dimensional object displaying apparatus that stores compressed information on a Z value for each pixel. The Z value given to each pixel is compressed in accordance with a square root function or a logarithmic function. The compressed Z value is then stored in the depth buffer. In addition, the depth buffer is composed of a W-value buffer and a Z-value lookup table. The Z-value lookup table has entries of which one is designated by a W value such that a given Z value is stored therein, and the W-value buffer stores a W value for each pixel.

REFERENCES:
patent: 4855938 (1989-08-01), Gonzalez-Lopez et al.
patent: 5561750 (1996-10-01), Lentz

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