Illuminant color detection
US5825916A · kind A · utility
7Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Dec 17, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6086
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for determining the color of an illuminant of a scene includes the steps of: forming a color digital image of the scene; forming a chromaticity bitmap of the digital image; smoothing the chromaticity bitmap; identifying a plurality of spokes in the smoothed chromaticity bitmap and projecting a plurality of beams across the smoothed chromaticity bitmap, each beam encompassing one of the spokes; identifying the intersection of the area occupied by the beams; and determining the central tendency of the intersection to determine the color of the illuminant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.