US 5,490,223 AGranted

Pattern recognition apparatus

AssigneeKabushiki Kaisha Toshiba

InventorsKazuo Nishimura, Naotake Natori

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Abstract

A pattern recognition apparatus includes a pattern analyzer for analyzing a similarity between an input pattern and a learning pattern, a hypothetic pattern forming section for forming, as a hypothetic pattern, a predetermined pattern corresponding to the input pattern in accordance with an analysis result from the pattern analyzer, a comparator for comparing the hypothetic pattern formed by the hypothetic pattern forming section with the input pattern, an attribute descriptor in which a comparison result obtained by the comparator and the analysis result obtained by the pattern analyzer are described, and an inference section for, referring to a description described in the attribute descriptor, outputting a clear analysis result obtained from the pattern analyzer as a final recognition result, and starting the hypothetic pattern forming section in response to an ambiguous analysis result by the pattern analyzer.

Claims12

Dependent claims

A pattern recognition apparatus comprising:

pattern analyzing means for analyzing a degree of similarity between an input pattern and a learning pattern to output analysis result information;
hypothetic pattern forming means for forming, as a plurality of hypothetic patterns, a plurality of deformation patterns obtained by deforming a predetermined pattern representing the input pattern in accordance with the analysis result information from said pattern analyzing means;
comparing means for comparing the hypothetic patterns formed by said hypothetic pattern forming means with the input pattern to output similarity information;
storing means for storing the similarity information obtained by said comparing means and the analysis result information obtained by said pattern analyzing means;
and
inference means for, referring to the information stored in said storing means, outputting a pattern corresponding to the analysis information as a final recognition pattern when the analysis result information represents a pattern recognizable as only one pattern, and starting said hypothetic pattern forming means when the analysis result information represents a pattern able to be recognized as a plurality of patterns, such that said hypothetic pattern forming means generates the hypothetic patterns from said analysis result information.

3 more elements

A pattern recognition apparatus comprising:

pattern analyzing means for analyzing a similarity between an input pattern and a learning pattern to output analysis result information;
hypothetic pattern forming means for forming, as a plurality of hypothetic patterns, a plurality of deformation patterns obtained by deforming a predetermined pattern representing the input pattern;
parameter generating means for storing, when a hypothetic pattern representing the input pattern is formed, a frequency distribution of a hypothetic pattern forming parameter used for forming the hypothetic pattern representing the input pattern, and sequentially generating hypothetic pattern forming parameters in accordance with the frequency distribution;
comparing means for comparing the input pattern with the plurality of hypothetic patterns formed by said hypothetic pattern forming means in accordance with the hypothetic pattern forming parameters generated by said parameter generating means;
storing means for storing information regarding a comparison result obtained by said comparing means and said analysis result information obtained by said pattern analyzing means;
and
inference means for outputting, referring to the analysis result information stored in said storing means and the input pattern, a pattern corresponding to the analysis result information as a final recognition result when the analysis result information represents a character pattern recognizable as only one pattern, and starting said hypothetic pattern forming means when the analysis result information represents a character pattern able to be recognized as a plurality of characters, such that said hypothetic pattern forming means generates the hypothetic patterns from said analysis result information.

4 more elements

Dependencies are inferred from the claim text.