Method and apparatus for detecting and compensating for white shading errors in a digitized video signal
US5157497A · kind A · utility
38Cited by
12References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Feb 25, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/81
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A white shading correction system capable of automatic determination of the amount of white shading correction to be applied to specific video image pixels as well as the application of that correction to a digitized video signal is disclosed. This system includes an inspecting portion for identifying the required correction within a video frame, a calculating portion for computing the amount of correction to be applied to the video signal, and a correction portion for correcting the video signal based upon the correction computed by the calculating portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.