Structure and method for film grain noise reduction
US6067125A · kind A · utility
94Cited by
7References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 15, 1997 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | May 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video signal is both spatially and temporally filtered. The output video signal is temporally noise reduced in portions of the image which exhibits little or no motion, and is spatially noise reduced in portions where motion exists. This approach is particularly applicable to reducing film grain noise in video material that originates from images on photographic films, since film grain noise is more correlated spatially than temporally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.