Incorporating pixel replacement for negative values arising in dark frame subtraction
US7113210B2 · kind B2 · utility
13Cited by
4References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 2002 |
| Grant date | Sep 26, 2006 |
| Priority date | — |
| Expiry date | May 27, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method of processing images in a digital camera and improving the quality of images produced by camera processing software. In low-light digital camera photography, a dark frame image is subtracted from an original picture image to form a resulting image. The resulting image formed from the dark frame subtraction is evaluated for negative and invalid pixel values. Each negative and invalid pixel value is replaced using a pixel replacement algorithm with appropriate positive values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.