Method and apparatus for segmenting data to create mixed raster content planes
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United States of America Patent
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Jun 4, 2002
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N/A
app pub date -
Dec 2, 1998
filing date -
Dec 2, 1998
priority date (Note) -
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Abstract
An improved technique for compressing a color or gray scale pixel map representing a document using an MRC format includes a method of segmenting an original pixel map into two planes, and then compressing the data or each plane in an efficient manner. The image is segmented by separating the image into two portions at the edges. One plane contains image data for the dark sides of the edges, while image data for the bright sides of the edges and the smooth portions of the image are placed on the other plane. This results in improved image compression ratios and enhanced image quality.
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