Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Patent
1996-02-14
1999-11-09
Jankus, Almis R.
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
G06T 1500
Patent
active
059823763
ABSTRACT:
A novel graphic display apparatus in which the pixel information for a multiplicity of layers arranged according to Z value including the color, the proportion in which the figure occupies the pixel and the Z value are held for each layer in a pixel memory. The Z value is compared between the pixel information of a newly-plotted figure and the multi-tiered pixel information held in the pixel information memory. In order to reduce the amount of memory space required, the pixel information stored in the bottom layer of the pixel memory is a combination of information synthesized from the color information having the Z value of the bottom layer and from at least one other layer having a Z value lower than the Z value associated with said bottom layer. In the case where the Z values are substantially equal to each other, the mask values included in each pixel information are summed and the pixel information to be written in the pixel information memory is determined by a pixel information computing section.
REFERENCES:
A. Schilling, et al. "A New Simple and Efficient Antialiasing with Subpixel Masks", Computer Graphics, vol. 25, No. 4, Jul. 1991.
Foley et al. "Computer Graphics Principles & Practice" pp. 692-695, 1990.
Abe Yuichi
Fujita Ryo
Koga Kazuyoshi
Soga Mitsuru
Hitachi , Ltd.
Jankus Almis R.
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