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Using edges and corners for character input

  • US 7,729,542 B2
  • Filed: 03/29/2004
  • Issued: 06/01/2010
  • Est. Priority Date: 04/04/2003
  • Status: Active Grant
First Claim
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1. A character recognition method, comprising:

  • using a processor to perform the following method;

    queuing continuous path data made by traversing edges and diagonals and into corners within a confining geometric shape constraining an input device to less than the input device'"'"'s total area;

    searching the queued continuous path data to generate a sequence of corner hits, where a corner hit corresponds to a corner defined by said geometric shape;

    identifying a character based on said sequence of corner hits independently of the remainder of the continuous path data;

    wherein each of said sequences of corner hits defines a single stroke, and wherein each single stroke is representative of one of a letter, number, punctuation or mode; and

    identifying a letter character as being upper case when said stroke representative of said character ends in a common predetermined corner and lower case when said stroke does not end in said common predetermined corner.

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