Color image data encoding apparatus having improved resolution/efficiency characteristics
US4974071A · kind A · utility
63Cited by
3References
43Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1988 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Apr 22, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for encoding color image data containing luminance information and color information in the unit of each block of predetermined size, by detecting the edge of the color image data in the block based on the luminance information and forming a code of a fixed length in response to the edge detection. The luminance information and the color information are coded into codes of different lengths according to the presence of absence of an edge, and codes are formed from the code of fixed length and codes of different lengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.