Image compression and restoring method for binary images

Details Image compression and restoring method for binary images Image compression and restoring method for binary images

2005-09-13

2005-09-13

Mancuso, Joseph (Department: 2625)

Image analysis

Image compression or coding

Gray level to binary coding

C382S238000, C382S239000, C382S247000, C382S253000, C358S002990, C358S539000

Reexamination Certificate

active

06944347

ABSTRACT:
The present invention relates to the image compression and restoring method for binary images that can be used in binary image equipment including printers.In the present invention, an image is not compressed by each pixel but by cell that combines four pixels. And each cell is compressed in two steps. In the first step, the number of black pixels contained in the cell is compressed. And in the second step, using the number of pixels the information compressed in the previous step, the exact location of pixels that constitute the cell is compressed. By doing this, the compression rate can be increased. And even when the compressed bit rows are restored in the first step, image restoration is available with just a small degradation.

REFERENCES:
patent: 4891643 (1990-01-01), Mitchell et al.
patent: 4901363 (1990-02-01), Toyokawa
patent: 4973961 (1990-11-01), Chamzas et al.
patent: 5023611 (1991-06-01), Chamzas et al.
patent: 5142283 (1992-08-01), Chevion et al.
patent: 5694128 (1997-12-01), Kim
patent: 5867114 (1999-02-01), Barbir
patent: 5963672 (1999-10-01), Yajima et al.
patent: 6285301 (2001-09-01), Bruekers et al.
patent: 6298150 (2001-10-01), Sonoda et al.
patent: 6411231 (2002-06-01), Yanagiya et al.
patent: 6553144 (2003-04-01), Hirao et al.

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