Method of identifying objects

Details Method of identifying objects Method of identifying objects

1988-11-14

1989-10-24

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 54, G06K 948

Patent

active

048767298

ABSTRACT:
In a method of identifying an object of the type wherein the object is photographed by a television camera, and a portion of the contour line of the object is detected by a photographed picture image, the picture image is scanned by a filter for designating a first group of a predetermined number of continuous picture elements and a second group of a plurality of picture elements spaced from the first group by a distance corresponding to the contour line of the object. Then presence or absence of a contour candidate point at which the brightness changes rapidly in respective picture image groups is detected, and it is identified that the object presents when the contour candidate points are simultaneously detected in respective picture element groups.

REFERENCES:
patent: 3973239 (1976-08-01), Kakumoto
patent: 4097158 (1978-06-01), Dehalt
patent: 4183013 (1980-01-01), Agrawala et al.
patent: 4201977 (1980-05-01), Shimizu
patent: 4238780 (1980-12-01), Doemens
patent: 4446484 (1984-05-01), Powell
patent: 4500202 (1985-02-01), Smyth
Smith et al., "A New Algorithm for Edge Detection", Computer Graphics and Image Processing, 1975, vol. 4, pp. 56-62.

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