Method and apparatus for real-time background illumination subtraction
US5585652A · kind A · utility
42Cited by
5References
16Claims
0Family size
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Inventors
Key dates
| Filing date | Oct 25, 1994 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Oct 25, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/153
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to methods and apparatus for accurately detecting light energy of a signal of interest (e.g., a laser pulse) even when the signal-to-noise ratio is relatively low. The present invention is further directed to accurate detection of a signal of interest even when either or both the signal of interest and background illumination vary across plural pixels of an imaging an array. For example, a signal of interest can be accurately detected even in the presence of pixel response non-uniformity and fixed pattern noise, or when the incident signal of interest is not confined laterally to a single pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.