Binary image data compression and decompression

Details Binary image data compression and decompression Binary image data compression and decompression

1995-02-13

1999-10-26

Boudreau, Leo H.

Image analysis

Image compression or coding

382244, 382246, 348420, 348422, 358433, G06K 936, G06K 946

Patent

active

059741791

ABSTRACT:
A method for preprocessing a binary file for data compression under a dictionary-based data compression algorithm takes advantage of redundancy in a two-dimensional binary image. The method rearranges a linear representation of a binary image, i.e. a representation based on pixels of horizontal lines, to a two-dimensional representation, i.e. a representation based on a sequence of adjoining picture areas, to achieve an improvement of compression ratio. The present invention is applicable to dictionary-based data compression methods, such as LZW, LZ77 and LZ78.

REFERENCES:
patent: 4697233 (1987-09-01), Scheuneman et al.
patent: 4706264 (1987-11-01), Cung
patent: 5046122 (1991-09-01), Nakaya et al.
patent: 5109437 (1992-04-01), Honda
patent: 5231679 (1993-07-01), Matsuura et al.
patent: 5455576 (1995-10-01), Clark, II et al.
patent: 5506621 (1996-04-01), Ogasawara et al.

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