Television – Image signal processing circuitry specific to television – Gray scale transformation
Reexamination Certificate
2005-01-26
2009-08-11
Tran, Trang U (Department: 2622)
Television
Image signal processing circuitry specific to television
Gray scale transformation
C348S603000, C348S673000, C348S365000
Reexamination Certificate
active
07573533
ABSTRACT:
Disclosed is a method for generating transfer curves for adaptive contrast enhancement. Transfer curves are generated so as to enhance the bright pixels in mostly dark images and the dark pixels in mostly bright images. For a dark image, a transfer curve is generated which increases luminance in high-luminance regions of the image without substantially changing the luminance in the mid- and low-luminance regions of the image. For a bright image, a transfer curve is generated which decreases the luminance in the dark areas of the image without substantially changing the luminance in the mid- and high-luminance regions of the image. For a medium-bright image, a transfer curve is generated with increases the luminance in the high-luminance range and decreases the luminance in the low-luminance range of the histogram without substantially changing the luminance in the medium-luminance range of the image.
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Beyer Law Group LLP
Genesis Microchip Inc.
Tran Trang U
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