Method of color correction

Details Method of color correction Method of color correction

2005-03-07

2009-08-18

Bali, Vikkram (Department: 2624)

Image analysis

Color image processing

Color correction

C382S162000, C382S274000, C382S168000, C348S223100, C345S589000, C345S581000

Reexamination Certificate

active

07577291

ABSTRACT:
A color defined by a chroma point and by a luma value is adjusted by defining a reference chroma point and shifting the chroma point towards the reference point if the chroma point is within a predefined tilted rectangle in the chroma coordinate plane that encloses the reference point; or if the chroma point is within both of two predefined polygons, in the chroma coordinate plane, that enclose the reference point; or if the luma value is within a predefined luma range. Preferably, the two polygons are a rectangle and a rhombus. The chroma point is shifted using a continuous shift function that vanishes on the rectangle and on the rhombus.

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patent: 2004/0114798 (2004-06-01), Park et al.

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