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Post-processing error correction scheme using a dictionary for on-line handwriting recognition

  • US 5,787,197 A
  • Filed: 03/28/1994
  • Issued: 07/28/1998
  • Est. Priority Date: 04/09/1992
  • Status: Expired due to Fees
First Claim
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1. A method of using a dictionary for on-line handwriting recognition, said method comprising the steps of:

  • inputting a handwritten word to be recognized;

    providing a top answer word for recognition, where said top answer word is made up of a sequence of at least one character which is made up of a sequence of at least one segment;

    providing a cache of ranked strokes derived from recognition of the handwritten word;

    determining if the sequence of characters in the top answer word matches a word in the dictionary with the same spelling, and if so, providing the top answer word as an output word; and

    if notcalculating a shape match score for the characters of the top answer word;

    determining if the shape match score for the worst character in the top answer word is better than a predetermined threshold, and if so, providing the top answer word as an output word; and

    if notidentifying a set of new candidate words from the dictionary, said set comprising words formed from all combinations of segments in the cache that produce recognizable characters;

    calculating match scores for the new candidate words, each match score comprising the sum of shape match scores of characters in the new candidate words;

    comparing the new match scores of the new candidate words and the top answer and providing the one having the best score as an output word.

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