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Optical object recognition method and system

  • US 6,473,524 B1
  • Filed: 04/14/1999
  • Issued: 10/29/2002
  • Est. Priority Date: 04/14/1999
  • Status: Expired due to Fees
First Claim
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1. An optical object recognition method applying a post-processing method to blobs parsed within a region of interest in an array of data and remaining after an initial pass of a recognition routine, the method including the steps of:

  • (a). dividing the region of interest into unknown regions by;

    (i). locating and defining a first end point of a dimension of each unknown region as a beginning of an unrecognized blob including a portion of the array of data from the region of interest analyzed by an optical object recognition routine that yielded no recognized objects;

    (ii). locating and defining a second end point of the dimension of each respective unknown region as a point at which unrecognized data stops; and

    (iii). defining each unknown region as extending between respective first and second end points;

    (b). analyzing each unknown region with a modified optical object recognition method by;

    (i). placing an analysis window over a portion of the unknown region;

    (ii). performing a correlation between a contents of the analysis window and a reference set of objects to determine whether the analysis window contains a recognizable object;

    (iii). removing the contents of the analysis window from the unknown region if the analysis window contains a recognizable object and recording a recognized object;

    (iv). moving the analysis window over a new portion of the unknown region if a remaining portion of the unknown region is larger than a predetermined size; and

    (v). repeating steps (ii)-(iv) until the remaining portion of the unknown region is smaller than the predetermined size; and

    (c). repeating steps (a) and (b) until all unknown regions have been analyzed.

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