Facsimile system with simplified detection of changing points to

Details Facsimile system with simplified detection of changing points to Facsimile system with simplified detection of changing points to

1991-04-05

1993-08-10

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Recording apparatus

3582612, H04N 1419

Patent

active

052354300

ABSTRACT:
In an MR coding operation for processing a facsimile image, relationships among changing pixels "a1", "a2", "b1" and "b2" are judged, and then after performing process operations of a horizontal mode and a vertical mode, confirmation is made whether or not the changing pixels "b1" and "b2" must be newly checked. When the changing pixels "b1" and "b2" are not required for a new detection, the changing pixels "b1" and "b2" which have been obtained during the preceding coding operation are employed in the subsequent coding operation. As a consequence, the operation to obtain the changing points in the pixels can be omitted and thus a highspeed coding process may be achieved.

REFERENCES:
patent: 4654719 (1987-03-01), Tomita
patent: 4760460 (1988-07-01), Shimotohno
patent: 4799110 (1989-01-01), Hisada et al.
patent: 5056154 (1991-10-01), Aono et al.
patent: 5136396 (1992-08-01), Kato et al.

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