Shaded picture signal processing system and method
US4366507A · kind A · utility
21Cited by
1References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1981 |
| Grant date | Dec 28, 1982 |
| Priority date | — |
| Expiry date | Jan 19, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40087
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A shaded picture signal processing system and method which produces recorded pictures of high quality with a small number of gradation levels with the resolution of the picture maintained nearly unchanged. False contours appearing as quantization distortion are removed by dispersing noise of equal magnitude to the false contours throughout the whole picture or a specified portion of the picture so that the false contours cannot be detected by the human eye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.