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Data processing system and method for field extraction of scanned images of document forms

  • US 5,416,849 A
  • Filed: 10/21/1992
  • Issued: 05/16/1995
  • Est. Priority Date: 10/21/1992
  • Status: Expired due to Fees
First Claim
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1. In a data processing system, a method for field extraction of scanned images of document forms, comprising the steps of:

  • creating a form definition for each form, which includes a form definition data set;

    marking each field which is to be subjected to field extraction, on a master form;

    defining a field viewpoint structure for each field, including field viewpoint primitive shapes including line ends, box ends, crossed lines, and blobs;

    breaking the area within and surrounding a marked field into regions, an inner region enclosed by the marked field and eight outer regions which surround the marked field;

    identifying types and locations of viewpoint primitives in each region;

    linking the defined primitive into a view relation;

    defining a field viewpoint structure as a set of all the viewpoint primitives and the view relation for a field;

    storing the coordinates of the field mark and the field viewpoint structure for each field;

    defining a collection of coordinates and field viewpoint structures for all fields on a form as a form definition data set for the form;

    storing the form definition data set in the system until a particular filled in copy of the form is scanned into the system.

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