Colorimetric circuit with storage of simultaneously detected color components
US4823185A · kind A · utility
10Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1987 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | Oct 27, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/88
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A colorimetric circuit comprising three detectors for detecting red, green and blue components respectively, a memory for storing the outputs of the detectors sampled at the same instant in logarithmically compressed form, and a control circuit for reading out the contents of the memory in sequence, thereby it being made possible to improve the accuracy of colorimetry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.