Light source estimating device, light source estimating...

Details Light source estimating device, light source estimating... Light source estimating device, light source estimating...

2003-11-12

2008-10-14

Tran, Phuoc (Department: 2624)

Image analysis

Color image processing

Color correction

C382S274000

Reexamination Certificate

active

07436997

ABSTRACT:
A light source estimation method of this invention estimates from the sensor response the color characteristics of an unknown light source of an image-pickup scene, in order to improve white balance adjustment and other aspects of the quality of color reproduction; a projection conversion portion6projects sensor response values5into an image distribution9in an evaluation space not dependent on the image-pickup light source2using parameters obtained by operations which can be calorimetrically approximated from spectral sensitivity characteristics of image-pickup unit4,which are known, and from spectral characteristics of an assumed test light source1;an evaluation portion10evaluates the correctness of a plurality of the test light sources1based on the distribution state of sample values of the projected scene; and accordingly, the correct image-pickup light source2is estimated.

REFERENCES:
patent: 7184080 (2007-02-01), Kehtarnavaz et al.
patent: 7362357 (2008-04-01), Brown et al.
patent: 2001/0040588 (2001-11-01), Shiraiwa et al.
patent: 0 891 077 (1999-01-01), None
patent: 5-111059 (1993-04-01), None
patent: 11-25252 (1999-01-01), None
patent: 2001-186540 (2001-07-01), None
patent: 2001-311666 (2001-11-01), None

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