Pattern detecting method and apparatus

Details Pattern detecting method and apparatus Pattern detecting method and apparatus

1989-07-18

1990-09-04

Tarcza, Thomas H.

Image analysis

Histogram processing

For setting a threshold

382 48, G06K 903, G06K 920

Patent

active

049550624

ABSTRACT:
A pattern detecting method for accurately detecting the position of a center of an image of a pattern is disclosed. The method includes the steps of forming an image of a pattern on an image pickup device, dividing the image of the pattern into plural portions and detecting the center of the image of the pattern in each portion, and determining the position of the center of the image of the pattern, on the basis of the data obtained by the detection made with regard to each portion.

REFERENCES:
patent: 4115762 (1978-09-01), Akiyama et al.
patent: 4499597 (1985-02-01), Alves
patent: 4566125 (1986-01-01), Clunn
patent: 4570181 (1986-02-01), Yamamura
patent: 4745296 (1988-05-01), Driller et al.

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