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MULTIISTAGE CLASSIFICATION PROCESSING SYSTEM OF CHARACTER PATTERN
MULTIISTAGE CLASSIFICATION PROCESSING SYSTEM OF CHARACTER PATTERN
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机译：字符模式的多分类算法
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摘要
PURPOSE:To classify and process character patterns efficiently with a high precision by extracting two complementary features included in character patterns and performing the multi-stage collation processing considering deformation of characters caused by difference of font. CONSTITUTION:Input character 1 is processed by outside contact frame detection circuit 4 and is inputted to storage circuit 5 after being read by scanning-type photoelectric converter 2. The output of storage circuit 5 has complemetary features of white and black extracted by white and black pattern generation circuits 9 and 8 in classification unit 6, and they are applied to collation circuits 10 and 14 successively and are compared with contents of feature pattern tables 11 and 12 of white and black of a known character, and classification result 7 is obtained. Collation circuit 10 compares a small number of feature vectors with one another to select candidate category 13 for finer classification in the next stage, and collation circuit 14 compares all vectors with one another in respect to this category.
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