Method of identifying contour lines

Details Method of identifying contour lines Method of identifying contour lines

1985-01-14

1987-02-17

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 25, 358107, 356376, G06K 948

Patent

active

046445838

ABSTRACT:
A contour line of a circle or an object having a configuration close to a circle or a portion thereof is identified by presuming picture image data representing a contour candidate point of the object to be detected among picture image data representing the brightness of one picture in which the object presents, and then scanning the picture image data of a predetermined region containing the picture image.

REFERENCES:
patent: 4017721 (1977-04-01), Michaud
patent: 4021778 (1977-05-01), Ueda et al.
patent: 4115761 (1978-09-01), Ueda et al.
patent: 4228432 (1980-10-01), Osborne
patent: 4361830 (1982-11-01), Honma et al.

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