Selective local transient improvement and peaking for video sharpness enhancement
US7668387B2 · kind B2 · utility
3Cited by
10References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2005 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Apr 17, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of selectively sharpening an image may include, for at least some pixels in the image, determining a frequency content associated with a pixel value in the image. The pixel may be linearly sharpened if the frequency content exceeds a threshold. The pixel may be non-linearly sharpened if the frequency content does not exceed the threshold. In some implementations, the non-linear sharpening may include wavelet decomposition of the image and enhancement of decomposed components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.