Patent Document ID: 9053350
Application ID: 13619853

Base Claim:
1. A method of correcting Optical Character Recognition (OCR) errors, comprising: converting a graphical representation of an original segment of text from a document into a first segment of text using a first OCR engine; converting the graphical representation of the original segment of text into a second segment of text using a second OCR engine; estimating an error probability for the first segment of text by matching the first segment of text with the second segment of text; responsive to the error probability exceeding a predetermined threshold value, generating a suspect interpretation, for the first segment of text, the suspect interpretation associated with a suspected OCR error; grouping the suspect interpretation with other similar suspect interpretations to form a cluster of suspect interpretations that are each associated with one or more occurrences of the suspected OCR error in the document; generating a representative question for the cluster; determining a correct answer for the representative question; and generating a corrected segment of text based on the correct answer, the corrected segment of text matching the original segment of text.

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Claim 2:
2. The method of claim 1 , wherein grouping the suspect interpretation with other similar suspect interpretations to form a cluster of suspect interpretations comprises: comparing the first segment of text with a segment of text of another suspect interpretation; responsive to the first segment of text matching the segment of text of the other suspect interpretation, comparing the graphical representation of the original segment of text with a graphical representation of the other suspect interpretation; and responsive to the graphical representations being sufficiently similar, grouping the suspect interpretation with the other suspect interpretation in the cluster.