Iterative smoothing technique for pre-processing mixed raster content planes to improve the quality of a decompressed image and increase document compression ratios

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United States of America Patent

PATENT NO 6334001
SERIAL NO

09733860

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Abstract

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A method and apparatus for compressing a mixed raster content image that represents a color or gray scale a document is disclosed. The pixel map is decomposed into a three-plane representation--a reduced-resolution 'upper' plane, a reduced-resolution 'lower' plane, and a high-resolution binary selector plane. An iterative smoothing technique is then used to pre-process the upper and lower planes using the information contained in the selector plane, thereby reducing the amount of data that will be subjected to further processing.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
XEROX CORPORATIONSTAMFORD, CT13415

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Buckley, Robert R Rochester, NY 41 814
de, Queiroz Ricardo L Pittsford, NY 47 776
Eschbach, Reiner Webster, NY 214 4139
Fuss, William A Rochester, NY 42 1177

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