Apparatus and method for processing digital images
US4825388A · kind A · utility
20Cited by
16References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1986 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Apr 1, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/395
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A computer graphics apparatus and a method for allowing the comparison of two or more digitally-stored images on a raster-scan display device, such as a cathode ray tube (CRT), by use of arithmetic or Boolean logic operations performed on the picture elements (pixels) in each image which are to be superimposed at a given display pixel on the CRT. The invention provides the features of color lookup tables, continuous zoom and roam logic and high-speed processing in a computer graphics apparatus for digital image comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.