Illuminant color detection

Details Illuminant color detection Illuminant color detection

1996-12-17

1998-10-20

Tran, Phuoc

Image analysis

Color image processing

382197, 382264, G06K 900

Patent

active

058259163

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.

REFERENCES:
patent: 4685071 (1987-08-01), Lee
patent: 5131058 (1992-07-01), Ting et al.
patent: 5416890 (1995-05-01), Baretta
patent: 5680327 (1997-10-01), Cook et al.

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