Adaptive quantization compatible with the JPEG baseline sequential mode

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United States of America Patent

PATENT NO 6175650
SERIAL NO

09013480

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Abstract

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Pixel blocks of an input image are type classified based on an analysis of the secord differences between the values of neighboring pixels in the rows and columns of each pixel block. A histogram of these second order differences may be employed to refine this analysis

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Patent Owner(s)

Patent OwnerAddress
XEROX CORPORATION201 MERRITT 7 P O BOX 4505 NORWALK CT 06851-1056

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Curry, Donald J Menlo Park, CA 45 912
Frailong, Jean-Marc Portola Valley, CA 114 4765
Kletter, Doron San Mateo, CA 58 1778
Nafarieh, Asghar Menlo Park, CA 33 809
Sindhu, Pradeep S Mountain View, CA 42 1896

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