Apparatus and method for compressing still images

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United States of America Patent

PATENT NO 5319724
SERIAL NO

07743517

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Abstract

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Transforms such as the DCT are useful for image compression. One close relative of the DCT is preferred for its arithmetic simplicity. A method and apparatus is described whereby the image compression is done with no multiplications while still compatible with a JPEG (Joint Photographic Experts Group) Transform. Other enhancements are made to improve image quality.

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Patent Owner(s)

  • RICOH COMPANY, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Allen, James D Santa Clara, CA 109 4699
Blonstein, Stephen M San Jose, CA 2 129
Boliek, Martin P Palo Alto, CA 6 242

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