Film grain generation and addition
US7664337B2 · kind B2 · utility
14Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2005 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Jul 13, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20204
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
High-frequency noise is generated that approximates the appearance of traditional “film grain” for a digital video signal. By adding a relatively small amount of film grain noise, the video can be made to look more natural and more pleasing to the human viewer. The digital film grain generation can be used to mask unnatural smooth artifacts in digital video such as “blockiness” and “contouring” in the case of compressed video and/or used to provide visual enhancements or special effects to any digital video stream. The digital film grain generator can control grain size and the amount of film grain to be added.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.