Noise reduction of images
US8582916B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2008 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Sep 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of reducing noise in an image, comprising: a) for each pixel being examined in the image, selecting a set of search pixels; b) calculating a value of one or more features of a neighborhood of each search pixel, and a value of corresponding features of a neighborhood of the pixel being examined; and c) calculating a reduced noise grey value for each pixel being examined, based on raw or transformed grey values of its search pixels, with greater sensitivity to those with one or more feature values similar to those of the pixel being examined; wherein calculating the value of at least one feature comprises calculating a characteristic of a distribution of raw or transformed grey values of pixels in the neighborhood, other than a mean grey value of all pixels in the neighborhood.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.