Image analysis – Histogram processing – For setting a threshold
Patent
1991-08-08
1993-08-17
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 14, 382 34, G06K 962
Patent
active
052376214
ABSTRACT:
Images such as product images are identified as substantially similar to one or more reference images by finding pixels which have substantially the same value or values in all or substantially all of the reference images. Image erosion and/or dilation may be used in processing the reference image data to help identify pixels which can always be expected to have the same value in all acceptable images. The values associated with the corresponding pixels in a product image are combined and compared to an expected value, and the dot product between the product image and the discriminant function is equal to a predetermined value. The values associated with pixels which correspond to regions not similar in substantially all of the reference images are combined to produce a discriminant function.
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Cox Kenneth A.
Dante Henry M.
Maher Robert J.
Boudreau Leo H.
Jackson Robert R.
Philip Morris Incorporated
Prikockis Larry J.
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