Image analysis – Image enhancement or restoration – Intensity – brightness – contrast – or shading correction
Reexamination Certificate
2011-03-01
2011-03-01
Le, Vu (Department: 2624)
Image analysis
Image enhancement or restoration
Intensity, brightness, contrast, or shading correction
C382S168000, C382S276000, C358S001900, C358S461000, C358S520000, C358S522000, C348S254000, C348S607000
Reexamination Certificate
active
07899266
ABSTRACT:
An image processing apparatus tone-compresses input luminance values representing luminance values of an input image. The image processing apparatus includes a conversion-curve calculator configured to calculate a conversion curve that is used for tone-compressing luminance values, on the basis of a distribution of the input luminance values; a global-luminance calculator configured to calculate global luminance values representing luminance values of a global-luminance image composed of low-frequency components of the input image; a tone compressor configured to tone-compress the input luminance values and the global luminance values according to the conversion curve; and a contrast corrector configured to correct contrast of a tone-compressed input image composed of the tone-compressed input luminance values, on the basis of a slope of the conversion curve and the tone-compressed global luminance values.
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Bloom Nathan
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Le Vu
Sony Corporation
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