Apparatus for identifying postage stamps

Details Apparatus for identifying postage stamps Apparatus for identifying postage stamps

1987-06-09

1989-01-10

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

209584, 250226, G06K 900

Patent

active

047979372

ABSTRACT:
An apparatus for identifying postage stamps automatically includes one or more scanners for detecting the various colors which are present at predetermined regions on the stamp proper and associated circuitry which receives the color signals and derives from them a feature vector which represents the color distribution over the scanned area. A plurality of feature vectors which define the color distribution associated with known stamps is stored in a memory. A comparator compares the feature vector of the stamp being examined to the prestored feature vectors and determines the identity of the stamps.

REFERENCES:
patent: 3488511 (1970-01-01), Mori et al.
patent: 3745527 (1973-07-01), Yoshimura et al.
patent: 4075604 (1978-02-01), Degasperi
patent: 4191940 (1980-03-01), Polcyn et al.
patent: 4194839 (1980-03-01), Knop
patent: 4204765 (1980-05-01), Iannadrea et al.

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