Circuit for automatic gamma balancing
US3974521A · kind A · utility
0Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1975 |
| Grant date | Aug 10, 1976 |
| Priority date | — |
| Expiry date | Sep 16, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/83
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In gamma balancing several color camera channels, a test signal replaces the normal signal from the pick-up tube and the resulting gamma-corrected signals in the channels are compared. Differences noted in the comparison are used to adjust the gamma correction stages in all but one of the channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.