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Apparatus and method for classifying and recognizing image patterns using neural network

  • US 5,887,078 A
  • Filed: 06/06/1996
  • Issued: 03/23/1999
  • Est. Priority Date: 12/29/1993
  • Status: Expired due to Term
First Claim
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1. An apparatus for classifying and recognizing an image received from an object, irrespective of scale and/or rotation of the image, the apparatus comprising:

  • a complex-log mapping means having optical input elements arranged in a polar exponential manner, for mapping the image received from the object into an orthogonal coordinate system, and for providing an output processed in parallel in the orthogonal coordinate system, the output being invariant to the scale and/or rotation of the imagea second-order neural network means for multiplying the output of the complex-log mapping means to produce a multiplication output and for adding the multiplication output to produce an output invariant to a positional translation caused by the complex-log mapping means; and

    a classifying and recognizing neural network means, having a neural network, for classifying and recognizing the output of the second-order neural network means.

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