Method for the classification of a pattern, for example on a ban

Details Method for the classification of a pattern, for example on a ban Method for the classification of a pattern, for example on a ban

1994-11-23

1996-06-04

Bartuska, F. J.

Check-actuated control mechanisms

Control mechanism actuated by check, other than coin , which...

By pliant currency

250556, G07D 700

Patent

active

055224911

ABSTRACT:
For the classification of a pattern in particular on a banknote or a coin, a receiving system detects, by a measurement procedure, vectors of a test item, a pre-processing system transforms the measured vectors into local feature vectors ALCi(l) and a learning classification system carries out a plurality of testing operations. A first activity compares in a first testing operation each of the local feature vectors ALCi(l) to a vectorial reference value. It is only if the first testing operation takes place successfully that the first activity, by means of first estimates which are stored in a data base, links the local feature vectors ALC(l) to provide global line feature vectors AGIi. In a second testing operation a third activity compares the global line feature vectors AGIi to corresponding reference values and, if the second testing operation is successful, computes a single global surface vector AGF of which a fourth activity. in a third testing operation, compares its distance in accordance with Mahalanobis relative to an estimated surface vector to a reference value. The test item is reliably classified if all three testing operations take place successfully.

REFERENCES:
patent: 4797937 (1989-01-01), Tajima
patent: 4881268 (1989-11-01), Uchida et al.
patent: 5167313 (1992-12-01), Dobbins et al.

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