Feature extracting method

Details Feature extracting method Feature extracting method

1989-11-28

1992-06-02

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 21, 382 27, G06K 944

Patent

active

051194457

ABSTRACT:
A feature extracting method converts an image data of an input line drawing into a graph representation and recognizes the input line drawing by use of the graph representation. The feature extracting method comprises a first step of equally dividing the image data of the input line drawing into meshes, a second step of obtaining a cell by integrating one or more meshes, and a third step of recognizing a cell pattern for each of cells which are obtained so as to form a graph in correspondence with each of the cells.

REFERENCES:
patent: 3609685 (1971-09-01), Deutsch
patent: 4379283 (1983-04-01), Ito et al.
patent: 4525860 (1985-06-01), Boivie
patent: 4628532 (1986-12-01), Stone et al.
patent: 4630307 (1986-12-01), Cok
Nakajima et al., "A Survey of Map and Drawing Input Technology", (1988), pp. 1-8.
Sakai, "Detailed Fundamental Studies on Information", (1983), pp. 74-81 and 150-151.
Kahan et al., "On the Recognition of Printed Characters of Any Font and Size", (1987), pp. 274-288.
Kunieda et al., "Recognition and Vector-Level Description of a Model Base by Regional Division of Multi-Level Images of Hand-Written and Machine Written Drawings", (Apr. 1989), pp. 1-56.
Smith, "Computer Processing of Line Images: A Survey", (1987), pp. 7-15.
Pavlidis, "A Vectorizer and Feature Extractor for Document Recognition", (1986), pp. 111-127.

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