Three-dimensional graphic display apparatus with improved high-speed anti-aliasing
US5982376A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1996 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Feb 14, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.