| 摘要 |
A character recognition system for reading alphanumeric characters and/or symbols printed or otherwise formed upon a document. The characters on the document are initially scanned in sequential fashion to generate a signal representative of the character. The representative signal is compared, on a character by character basis, against standardized signals each representing high quality criteria of those characters which the system is capable of recognizing. A signal is generated to indicate any character which fails recognition. After each of the characters are scanned and either identified as valid characters or are rejected, an analysis is made to determine the greatest likelihood of the identity of the rejected character or characters. A second scanning operation is performed on only those characters which have failed recognition. The criteria of those standardized signals compared against the rejected character are also significantly reduced to greatly enhance the probability of recognition of rejected characters.
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