Method for digital compression of color images
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United States of America Patent
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Mar 12, 2002
Grant Date -
N/A
app pub date -
Apr 17, 1998
filing date -
Apr 17, 1998
priority date (Note) -
Expired
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Abstract
The method for digital compression of color images digitally compresses color identification photographs into 512 to 2,048 bytes for storage of rectangular images in smart cards and databases. The method operates in the YCrCb color space and includes a novel color space conversion method for converting digital image data from a 15- or 24-bit RGB (Red-Green-Blue) color space to the YCrCb (Luminance-Chrominance) color space. The compression method uses a lookup table for color space conversion. A unique chromakey method is used to replace the background with a solid color to increase the visual quality of the compressed image, and to automate and simplify the chromakey process.
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