Image analysis – Histogram processing – For setting a threshold
Patent
1987-11-13
1989-03-07
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 50, 34082534, G06K 900
Patent
active
048114081
ABSTRACT:
A document identification system incorporating an identification card bearing image indicia that is sensed and tested for comparison with reference data. The image indicia on the card, e.g. a photographic likeness of the card assignee, is dissected to provide representative pixel data. Individual image pixel representations are quantized, digitized and stored in an escort memory, e.g. a magnetic stripe on the card. The card is verified by again sensing the image indicia and processing the data as before. The resultant test data is correlated with the reference data from the escort memory. The composite indication of the correlation is manifest as an acceptance or a rejection and also as a two-dimensional binary display (black or white pixel areas) to reveal an analysis of the correlation for manual interpretation. The display is variable for different levels of detail.
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Boudreau Leo H.
Daley Donald J.
Light Signatures, Inc.
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