Apparatus for and method of compressing form data

Details Apparatus for and method of compressing form data Apparatus for and method of compressing form data

1986-04-17

1988-10-04

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358260, G06K 900

Patent

active

047760281

ABSTRACT:
A form data compressing method in which form data are stored in memory for every raster, the raster data pattern of each raster is divided into a plurality of units each having a plurality of bits, the unit data patterns of these units are subjected to comparison to perform the compression in unit order direction, and according to the compression data obtained by the compression in unit order direction the compression in raster order direction is carried out.

REFERENCES:
patent: 3347981 (1967-10-01), Kagan et al.
patent: 3686631 (1972-08-01), Elliot
patent: 4193092 (1980-11-01), Stoffel
patent: 4365273 (1982-12-01), Yamada et al.
patent: 4580134 (1986-04-01), Campbell et al.
patent: 4622585 (1986-11-01), Reitsma

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