Graphic edge extracting apparatus

Details Graphic edge extracting apparatus Graphic edge extracting apparatus

1987-10-02

1990-09-04

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 44, G06K 900

Patent

active

049550640

ABSTRACT:
A graphic edge extracting apparatus includes a memory unit for storing graphic image data and a graphic edge pixel extracting unit for developing the graphic image data on a bit plane in a bit map memory in the memory unit and executing bitblt (bit block transfer: synthesis during drawing) processing a plurality of times, thereby extracting inner edge pixels of the graphic image.

REFERENCES:
patent: 3882454 (1975-05-01), Marie et al.
patent: 3899771 (1975-08-01), Saraga et al.
patent: 4587617 (1986-05-01), Barker et al.

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