Image analysis – Color image processing – Compression of color images
Reexamination Certificate
2004-08-05
2009-06-23
Wu, Jingge (Department: 2624)
Image analysis
Color image processing
Compression of color images
C358S002100, C382S232000, C382S233000
Reexamination Certificate
active
07551773
ABSTRACT:
In one aspect, an image is quantized by assigning sub-ranges of pixel values in the image to respective quantization levels. The quantized image is encoded based at least in part on a mask lookup table assigning index values to respective masks, wherein each mask corresponds to a respective spatial distribution of the quantization levels. In another aspect, a code corresponding to an encoded image with pixel values quantized to respective quantization levels is received. The code is decoded based at least in part on a mask lookup table assigning index values to respective masks, wherein each mask corresponds to a respective spatial distribution of the quantization levels.
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Bergman Ruth
Keshet Renato
Ruckenstein Gitit
Shaked Doron
Hewlett--Packard Development Company, L.P.
Lee John W
Wu Jingge
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