Contour free point operation for video skin tone correction

Details Contour free point operation for video skin tone correction Contour free point operation for video skin tone correction

2010-08-24

2011-10-25

Hsia, Sherrie (Department: 2422)

Television

Image signal processing circuitry specific to television

Hue control

C348S653000, C348S649000

Reexamination Certificate

active

08045062

ABSTRACT:
A method for color tone correction is disclosed. The method generally includes the steps of (A) generating a plurality of first intermediate components by scaling a plurality of first color components towards a first ideal color, wherein the first color components (i) are for a first plurality of pixels in an input video signal and (ii) fall inside a first region of a color space, (B) generating a plurality of first corrected components by adjusting the first intermediate components such that a first mapping of the first color components to the first corrected components is both (i) continuous in the color space and (ii) non-overlapping in the color space and (C) generating an output video signal by combining the first corrected components with a plurality of unaltered color components, wherein the unaltered color components (i) are for a second plurality of the pixels and (ii) fall outside the first region.

REFERENCES:
patent: 5191548 (1993-03-01), Balkanski et al.
patent: 5559532 (1996-09-01), Gardyne
patent: 5568167 (1996-10-01), Galbi et al.
patent: 5953691 (1999-09-01), Mills
patent: 6124899 (2000-09-01), Swan et al.
patent: 7057671 (2006-06-01), Dumitras et al.
patent: 2004/0264788 (2004-12-01), Bazin et al.

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