Image analysis – Color image processing – Color correction
Reexamination Certificate
2005-02-08
2008-09-02
Bella, Matthew C. (Department: 2624)
Image analysis
Color image processing
Color correction
C382S168000, C382S274000, C382S192000, C382S162000, C358S001900, C358S518000, C358S522000, C358S523000
Reexamination Certificate
active
07421120
ABSTRACT:
An apparatus and method for selectively increasing contrasts of bright and dark regions and automatically determining an appropriate degree of correction such that the image has a corrected luminance that is closer to an estimated optimal average luminance (EOAL) determined from a quantity of light at pickup. The apparatus for correcting the image comprises a real average luminance calculating means for calculating a Real Average Luminance (RAL) of an incoming image from a luminance histogram representing a luminance distribution of pixels of the incoming image, an optimal average luminance estimating means for obtaining a quantity of light using information with respect to a pickup condition of the incoming image and for estimating the EOAL from the quantity of light, and a luminance correcting means for correcting a luminance of pixels of the incoming image based on a luminance difference (ΔL) between the RAL and the EOAL.
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Bayat Ali
Bella Matthew C.
Roylance Abrams Berdo & Goodman LLP
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