Image analysis – Color image processing – Color correction
Reexamination Certificate
2004-09-09
2009-11-10
Do, Anh Hong (Department: 2624)
Image analysis
Color image processing
Color correction
C382S168000, C382S162000
Reexamination Certificate
active
07616811
ABSTRACT:
A method in a digital image processing chain adjusts for a colour balance. In the method, the subject is imaged by pixels to form value-sets of the colour components, component-specific histograms are formed from the value-sets of the colour components, cumulative histograms are formed from the component-specific histograms, the illumination colour corresponding to at least one colour component is defined from the cumulative histograms, and using target colour and defined illumination colour are defined for at least two colour components, a gain factor adjusts the colour balance. In addition, a corresponding system, equipment, and software means implement the method.
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Ashikhmin, M., “A Tone Mapping Algorithm for High Contrast Images”, 2002, 13thEurographics Workshop on Rendering, © Eurographics Association, pp. 145-155.
Kalevo Ossi
Nenonen Petri
Do Anh Hong
Harrington & Smith PC
Nokia Corporation
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