Picture image file device

Details Picture image file device Picture image file device

1984-10-02

1986-12-30

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

340799, 358 22, 382 41, G06K 936

Patent

active

046335064

ABSTRACT:
A picture image file device for storing original documents such as drawings as a picture image file, characterized in that said device is provided with a picture image storing section for storing in a picture image file a predetermined number of picture image units obtained by dividing the picture image file into the predetermined number and a signal processing section in which when another original document, the contents of which have been changed partially from the first-mentioned original document, is inputted, the changed original document is divided into the predetermined number of picture image units and the divisions of the changed original document are compared with the picture image unit so that only the parts of the original document having changed contents are stored as new picture image units in the picture image storing section.

REFERENCES:
patent: 3772465 (1973-11-01), Vlahos et al.
patent: 4121196 (1978-10-01), Johnson et al.
patent: 4164024 (1979-08-01), Gilbert
patent: 4203107 (1980-05-01), Lovercheck
patent: 4360806 (1982-11-01), von Knorre et al.

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