Identifying matching canonical documents in response to avisual
US9183224B2 Patents
A server system receives a visual query from a client system. The visual query is an image containing text such as a picture of a document. At the receiving server or another server, optical character recognition (OCR) is performed on the visual query to produce text recognition data representing textual characters. Each character in a contiguous region of the visual query is individually scored according to its quality. The quality score of a respective characteris influenced by the quality scores of neighboring or nearby characters. Using the scores, one or more high quality strings of chara
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