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Method and apparatus for high speed identification of objects having an identifying feature

  • US 5,742,037 A
  • Filed: 03/07/1996
  • Issued: 04/21/1998
  • Est. Priority Date: 03/07/1996
  • Status: Expired due to Term
First Claim
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1. A method for identifying an object having an identifying feature, said identifying feature having at least one predefined characteristic, said method comprising the steps of:

  • 1) creating a representation of said object;

    2) locating at least one feature in said representation of said object having a corresponding characteristic similar to said at least one characteristic of said identifying feature and creating a second representation of at least one other characteristic of said located feature, the step of locating including the substeps of;

    sampling at least one portion of said representation of said object at a predefined position in said representation, including sampling, including sampling at predetermined locations across said representation of said object in a predefined direction, said locations being spaced apart by a distance corresponding to at least one characteristic of said identifying feature; and

    creating said second representation of said sampled portion of said representation consisting of a representation of at least one other characteristic of said located feature;

    3) normalizing at least a portion of said second representation of said at least one other characteristic of said located feature, to create a normalized representation of said feature;

    4) comparing said normalized representation of said at least one other characteristic of said feature to a predefined representation of a corresponding characteristic of said identifying feature.

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