Methods and apparatus for reducing structured noise in video
US8928813B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2010 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Nov 23, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/213
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of operating a computer system to reduce structured noise in a video is described. Patches in a frame of a sequence of video frames are selected using a modified non-local means (NLM) search algorithm with a reduced search complexity compared to conventional NLM search algorithms. The set of spatial neighboring patches in a frame is extended to include patches in adjacent frames of the video sequence. Patches in the adjacent frames are selected based, at least in part, on a projection of a location of a pixel in the frame into the adjacent frames using a motion estimation algorithm. An average value determined from the combined set of patches is used to replace the pixel currently being processed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.