Image analysis – Image enhancement or restoration – Edge or contour enhancement
Reexamination Certificate
2009-05-11
2009-12-15
Bali, Vikkram (Department: 2624)
Image analysis
Image enhancement or restoration
Edge or contour enhancement
C382S162000, C382S168000, C382S254000, C382S199000, C358S426010
Reexamination Certificate
active
07634150
ABSTRACT:
A method of removing ringing and blocking artifacts from a decompressed digital image. In one method, a background value of the digital image a background region and foreground regions is determined, and a threshold value is computed. A mapping of the digital image is then generated by thresholding the digital image based on the threshold value to produce a thresholded image, and enlarging the foreground regions of the thresholded image to form a map image. The mapping includes the background pixels of the map image. The background region of the decompressed digital image is then cleansed based on the mapping. In an alternate method, ringing artifacts are removed from a decompressed digital image based on a signal-to-noise ratio of the image. In yet another alternate embodiment, ringing artifacts are from a decompressed digital color image that includes a chrominance channel and a luminance channel. An alternate embodiment removes ringing and blocking artifacts.
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Eschbach Reiner
Fan Zhigang
Malik Amal Z.
Oztan Basak
Bali Vikkram
Bayat Ali
Fay Sharpe LLP
Xerox Corporation
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