Device for converting normal outline data into compressed outlin

Details Device for converting normal outline data into compressed outlin Device for converting normal outline data into compressed outlin

1991-01-23

1992-09-22

Couso, Jose

Image analysis

Histogram processing

For setting a threshold

382 22, 382 25, G06K 936

Patent

active

051504316

ABSTRACT:
A data compressing device for preparing compressed outline data from normal outline data representative of an outline of a character which consists of a plurality of segments connected end to end so as to form a closed loop. The normal outline data includes coordinate data representative of X and Y coordinate of segment specifying points which determine positions of the segments, and segment type data indicative of a type of each segments. The device is adapted to determine whether or not all of a plurality of successive points of the segment specifying points which successive points are successively located along the closed loop have a same X or Y coordinate, and omits the X or Y coordinate for at least one of those successive points, to thereby prepare the compressed outline data, if all of the successive points have the same X or Y coordinate which is equal to the X or Y coordinate to be omitted. Also disclosed is a device adapted to convert the compressed outline data into the normal outline data, by restoring the X and Y coordinates omitted in the compressed outline data.

REFERENCES:
patent: 4189711 (1980-02-01), Frank
patent: 4542412 (1985-09-01), Fuse et al.
patent: 4550438 (1985-10-01), Convis et al.
patent: 4771474 (1988-09-01), Takashima et al.

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