Method and system for separating illumination and reflectance using a log color space
US7596266B2 · kind B2 · utility
46Cited by
2References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2006 |
| Grant date | Sep 29, 2009 |
| Priority date | — |
| Expiry date | Mar 15, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a first exemplary embodiment of the present invention, an automated, computerized method for generating an illumination invariant, chromaticity representation of an image is provided. The method of the present invention comprises the steps of providing an image comprising an array of pixels, each pixel having N band color values, transforming the N bands to log color space values in a log color space, generating a bi-illuminant chromaticity plane in the log color space and projecting the log color space values to the chromaticity the plane to provide chromaticity representation values corresponding to the pixels of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.