| 摘要 |
PURPOSE:To discriminate a candidate character category with high precision by extracting a difference between categories on a standard pattern as to the category of a candidate for an input character pattern, and detecting whether the difference is in a stroke extracted from the input character pattern. CONSTITUTION:The character pattern from an input part 1 is passed through a preprocessing circuit 2, and a rough classifying device 3 narrows down a candidate character category and passes to a structure difference extracting circuit 5, which extracts the differences from the standard patterns of two optional categories read out of a standard pattern storage circuit 4. A stroke extracting circuit 6 receives the character pattern from the circuit 2 and the structure difference extracted by the circuit 5 to calculate similarity on the basis of feature point information, and sends the value, etc., to a structure deciding circuit 7 when the similarity is larger than a threshold value. The circuit 7 decides whether the structure difference pattern received from the circuit 5 is present in a character line extracted by the circuit 6 or not. Thus, the structural difference between the candidate character categories is detected to improve character discriminating performance greatly.
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