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US 2002/0176631 A1Published application
High performance lossless compression of grayscale documents
AssigneeSharp Laboratories of America, Inc.
InventorXin Li
Life of this patent
Estimating the term…
Abstract
A method for compression of compound images. The method determines a classification for a current pixel based upon its causal neighbors and codes the pixel according to a mode determined by the classification. This coding results in production of a symbol for the pixel and the symbol is then mapped to the output stream.
Claims9
A method for compression of compound images, the method comprising:
- a) determining a classification for a current pixel based upon its causal neighbors;
- b) coding the pixel using conditional coding according to a mode determined by the classification, producing a symbol for the pixel;
- and
- c) mapping the symbol to an output bit stream.
1 more element
An article, including machine-readable instructions that, when executed, cause the machine to:
- a) determine a classification for a current pixel based upon its causal neighbors;
- b) code the pixel according to a mode determined by the classification, producing a symbol for the pixel;
- and
- c) map the symbol to an output bit stream.
1 more element
Dependencies are inferred from the claim text.