Character compression technique

Details Character compression technique Character compression technique

1984-11-23

1986-12-30

Kreitman, Stephen A.

Image analysis

Histogram processing

For setting a threshold

G06K 948

Patent

active

046335056

ABSTRACT:
The present invention is concerned with compression encoding and, in particular, the encoding of the second difference of the position of the boundary of a character on consecutive scanlines. Special code sequences represent the starting location for two new character boundaries relative to the last position in the scanline generated, the next two character boundaries that do not extend into the next scanline, and the end of a line when the preceeding scanline had no intersections with a character boundary. Also included are code sequences representing the first item on the last scanline of the character to terminate the code and at the right of all other boundaries on the current scanline.

REFERENCES:
patent: 3471848 (1969-10-01), Manber
patent: 3686631 (1972-08-01), Elliott
patent: 3833900 (1974-08-01), Bahl et al.
patent: 3979742 (1976-09-01), Kolb et al.
patent: 4443794 (1984-04-01), Sakurai
patent: 4555191 (1985-11-01), Gojo

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