Confusion matrix based method and system for correcting misrecognized words appearing in documents generated by an optical character recognition technique
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United States of America Patent
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Nov 28, 2000
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N/A
app pub date -
Aug 11, 1997
filing date -
Aug 11, 1997
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Abstract
A method and apparatus for correcting misrecognized words appearing in electronic documents that have been generated by scanning an original document in accordance with an optical character recognition ('OCR') technique. If an incorrect word is found in the electronic document, the present invention generates at least one reference word and selects the reference word that is the most likely correct replacement for the incorrect word. This selection is accomplished by performing a probabilistic determination that assigns to each reference word a replacement word recognition probability. The probabilistic determination is carried out on the basis of a pre-stored confusion matrix that stores a plurality of probability values. The confusion matrix is used to associate each character of recognized word in the electronic document with a corresponding character of a word in the original document on the basis of these probability values.
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