Image analysis – Color image processing
Patent
1996-04-24
2000-05-02
Au, Amelia
Image analysis
Color image processing
358518, G06K 900, H04N 156
Patent
active
060582073
ABSTRACT:
A method is described for selective color correction of an original color image. In one embodiment, a color is selected by picking a colored pixel from the color image and a changed color, having a restricted color change, is associated with the selected color. All original colors, situated within a local color gamut, comprising the selected color, undergo a color modification according to the color change. The effect of the modification decreases as the original color reaches the boundary of the local color gamut. The selected color and changed color may be defined in the native color space, the local color gamut is preferentially defined by an action radius related to a psychometric color space. Two or more selective color corrections may be combined by a weighted mean modification, by choosing for each color change a weight value, which decreases as the selected color is more different from the original color.
REFERENCES:
patent: 5202935 (1997-08-01), Kanamori et al.
patent: 5268754 (1997-08-01), Van de Capelle et al.
patent: 5471324 (1997-08-01), Rolleston
patent: 5473736 (1997-08-01), Young
patent: 5548697 (1997-08-01), Zortea
patent: 5552904 (1997-08-01), Ryoo et al.
Stokes Earle
Tuijn Chris
Agfa Corporation
Ahmed Samir
Au Amelia
Kelley Edward L.
Merecki John A.
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