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1984-08-01

1987-01-13

Kreitman, Stephen A.

Image analysis

Histogram processing

For setting a threshold

382 18, G06K 920

Patent

active

046370544

ABSTRACT:
The condition of an article e.g. a multihead tool array is compared after having been subjected to some operation with its previous condition e.g. before and after a drilling or other operation of the tool array by forming an image, e.g. a video image, of the article before the operation and automatically comparing it with a second such image formed after the operation. Known image enhancement techniques can be used, and statistical techniques used in data processing equipment to detect significant differences between the images.

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