Infrared video camera shading correction device
US4879598A · kind A · utility
12Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1988 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | Nov 28, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An infrared video camera shading correction device which includes an averaging circuit for averaging during a few frames the output of an infrared image sensor to provide an average output, a shading pattern generator for generating a shading pattern similar to that of an optics of the infrared video camera, a multiplier for multiplying the average output by the shading pattern signal to provide a multiplication output, and a subtractor for subtracting the multiplication output from the infrared video signal of the infrared image pickup section for effecting shading correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.