Image inspection/recognition method, method of generating refere

Details Image inspection/recognition method, method of generating refere Image inspection/recognition method, method of generating refere

1995-06-09

1997-06-10

Boudreau, Leo

Image analysis

Image transformation or preprocessing

Walsh, hough, or hadamard transform

382159, G06K 900

Patent

active

056384653

ABSTRACT:
An image of a part is used to judge whether it is good or no good. A predetermined intensity, edge or similar feature image is extracted from the inspected image and is quantized. The quantized feature image is obtained from a training image in advance, and the feature is subjected to a generalized Hough transform operation which refers to the weight of each feature point for each feature value in the image and vote the feature point weight. The similarity is obtained from the results of the transform operation, and a good
o good judgement is made depending upon whether the similarity is above or below a threshold value.

REFERENCES:
patent: 4567610 (1986-01-01), McConnell
patent: 4613269 (1986-09-01), Wilder et al.
patent: 4618989 (1986-10-01), Tsukune et al.
patent: 5097517 (1992-03-01), Holt
patent: 5208869 (1993-05-01), Holt
patent: 5231580 (1993-07-01), Cheung et al.

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