Methods and apparatus for optically determining the acceptabilit

Details Methods and apparatus for optically determining the acceptabilit Methods and apparatus for optically determining the acceptabilit

1989-02-09

1991-09-03

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 15, 364552, G06K 900

Patent

active

050461117

ABSTRACT:
The appearance of a product is determined to be acceptable or unacceptable by computing a discriminant function or image from a plurality of two-dimensional images of products of the kind to be inspected. A two-dimensional image of the product is then formed and processed using the discriminant image to produce an output value which can be compared to a predetermined value used in computing the discriminant image. If the output value deviates from the predetermined value by more than a predetermined amount, the product has been found to have an unacceptable appearance.

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G. H. Golub et al., "Generalized Cross-Validaiton as a Method for Choosing a Good Ridge Parameter," Technometrics, vol. 21, No. 2, May 1979.

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