Apparatus and method for compressing still images

United States of America Patent

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Jun 7, 1994
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Aug 9, 1991
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Apr 19, 1990

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Abstract

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	Address
RICOH COMPANY LTD A CORP OF JAPAN	N0 3-6 1-CHOME NAKAMAGOME OTA-KU TOKYO 143
RICOH CORPORATION A CORP OF DELAWARE	SUITE 115 2882 SAND HILL ROAD MENLO PARK CA 94025

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G06K:RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD ....

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Inventor Name	Address	# of filed Patents	Total Citations
Allen, James D	Santa Clara, CA	111	4786
Blonstein, Stephen M	San Jose, CA	2	129
Boliek, Martin P	Palo Alto, CA	6	242

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Apparatus and method for compressing still images

Number of patents in Portfolio can not be more than 2000

United States of America Patent

07743517

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SERIAL NO	07743517
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