Method for calculating gain correction factors in a digital imaging system
US6350985B1 · kind B1 · utility
23Cited by
20References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 26, 1999 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Apr 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/325
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for developing a set of gain correction coefficients corrected for structural noise to be used in correcting the digital values representing an image captured by a pixelated detector having a plurality of individual sensors. The gain correction coefficients are developed by first obtaining a first set gain correction coefficients using a flat exposure and adjusting the individual sensor gain output so that all sensors produce the same output value, and then applying a smoothing filter to the first set of gain correction coefficients to obtain a new set of corrected gain correction coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.