Apparatus for processing video signals received from an optical scanner
US4337455A · kind A · utility
2Cited by
13References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1981 |
| Grant date | Jun 29, 1982 |
| Priority date | — |
| Expiry date | Jan 2, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for processing video signals received from an optical scanner is described. A comparator means is used for comparing the video signals with a dynamic threshold voltage. This threshold voltage is generated by a peak detector circuit which also receives the video signals. The peak detector circuit includes decay means for decaying signals representative of the detected peaks at a predetermined rate. This thresholding technique provides compensation for a wide dynamic range of video signals received from a photodiode array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.