Method for adjusting the luminance of a color signal
US5398077A · kind A · utility
4Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1992 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | May 19, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/68
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A luminance signal is formed from an original color signal and is used to determine a new luminance. The original color signal is then adjusted to have the new luminance in a way that does not change the hue or saturation of the original color. The method is embodied in an analog or a digital circuit and in the alternate may be may be emulated in a general purpose computer. The method permits a change in color signals which affect the overall brightness only in a non-linear way, while adding only a small amount of additional hardware or computation to implement the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.