Green non-uniformity correction
US9113118B2 · kind B2 · utility
5Cited by
6References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 2013 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Feb 8, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for correcting green channel non-uniformity (GNU) are provided. In one example, GNU may be corrected using energies between the two green channels (Gb and Gr) during green interpolation processes for red and green pixels. Accordingly, the processes may be efficiently employed through implementation using demosaic logic hardware. In addition, the green values may be corrected based on low-pass-filtered values of the green pixels (Gb and Gr). Additionally, green post-processing may provide some defective pixel correction on interpolated greens by correcting artifacts generated through enhancement algorithms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.