Character recognizing system for machine-printed characters

Details Character recognizing system for machine-printed characters Character recognizing system for machine-printed characters

G - Physics

06

K

354/59

G06K 9/00 (2006.01)

Patent

CA 1066804

ABSTRACT Disclosed is a character recognizing system for machine-printed characters such as alphanumerics, in which the characters are recognized through their comparison with a plurality of standard patterns of the charac- ters. In a conventional character recognizing system, the character recog- nition is achieved by comparison of an input pattern with a plurality of pre- determined standard patterns. For this purpose, a great number of standard patterns are provided, for example, at least 10 kinds of standard patterns for numerals, and at least 26 kinds for letters. Further, in case the charac- ters to be recognized have various kinds of character-types or fonts, more standard patterns are necessary so as to recognize the input patterns with minimum errors. Therefore, the conventional system requires a memory means of great capacity. This makes the system more expensive as a whole. The system disclosed provides improved character recognizing system requiring a smaller capacity of the memory means. In the present system a great num- ber of standard patterns are classified into a plurality of groups each hav- ing one common standard patterns turn having a pattern arrangement in com- mon with the standard pattern of each group, and a plurality of non-common standard patterns representing differences between the standard patterns and the common standard pattern. An input pattern read out by scanning a printed character is first compared with the common standard pattern of any group. Only when the difference from the common standard pattern is less than a predetermined value is the input pattern compared with the non-common standard patterns in the same group.

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