Image analysis – Pattern recognition – Classification
Patent
1992-04-03
1995-06-06
Mancuso, Joseph
Image analysis
Pattern recognition
Classification
382159, 382276, G06K 962
Patent
active
054229618
ABSTRACT:
Speed and accuracy of the recognition process for an alphanumeric automated recognizer is enhanced by a novel scheme for comparing known prototype symbols to examples of unknown symbol. The scheme is invariant with respect to a selected set of small transformations of either the prototypes or the examples, requires only a few operators, and generates accuracy rates comparable to a human operator. The small transformations of interest are expressed locally by a process in which, during the data processing, the derivative of the transformed image with respect to the parameter that controls the transformation is calculated. This directional derivative then is used as the generator of interest in the recognition machine and is incorporated into the comparison process. The derivatives are generated by using tangent plane concepts, which yield a useful approximation of an otherwise not quantifiable complex surface in the neighborhood occupied by the unknown example. Computation time is decreased and recognition accuracy is increased.
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AT&T Corp.
Finston Martin I.
Graves Charles E.
Mancuso Joseph
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