Scaling processor for raster images
US5363119A · kind A · utility
20Cited by
15References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Jan 15, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for scaling raster images. Digital pictures are stored in a run length encoded (RLE) format. Object specifiers include a picture index and a scale factor. A line fill state machine, or blitter, scales a raster scan line asynchronously of raster scan synchronization signals. A bit slice processor controls the operation of the blitter and vertical scaling. The growth or shrink scaling is performed about a pre-selected center of mass. A double buffered frame buffer allows one frame buffer to be read while the other is written.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.