System and method to compress image data using fixed and variable length compression
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United States of America Patent
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Jun 1, 2004
Grant Date -
N/A
app pub date -
Jul 29, 1999
filing date -
Jul 31, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
When document image data are compressed, the data are divided into blocks including a plurality of adjacent pixels and are compressed according to attribute of the block in the unit of block. A plurality of encoders are provided for secondary encoding according to the type of image data, and one of them is selected appropriately according to the data type of the entire document. The data are compressed in the unit of block according to the decided attribute and the document type. Alternately, an input section received a compression ratio, and a second compression section compresses the image data further at the compression ratio.
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