Image analysis – Pattern recognition – Feature extraction
Patent
1994-05-25
1997-09-09
Boudreau, Leo
Image analysis
Pattern recognition
Feature extraction
382266, G06K 900
Patent
active
056664397
ABSTRACT:
An image processing method and apparatus extracts outline vectors from a binary image, by defining outline points at positions between white pixel area and black pixel area, closer to the black pixel area, to extract vectors representing the black pixel area smaller than the white pixel area. Outline vector patterns are defined in advance in consideration of the length and the direction of an object vector and the lengths and relative directions of preceding and subsequent vectors. Upon smoothing of the image, outline point after the smoothing are determined in accordance with an outline vector pattern that corresponds to the states of an object vector and its preceding and subsequent vectors in an outline.
REFERENCES:
patent: 5023918 (1991-06-01), Lipscomb
patent: 5050222 (1991-09-01), Lee
patent: 5093870 (1992-03-01), Watanabe
patent: 5197108 (1993-03-01), Watanabe
patent: 5327260 (1994-07-01), Shimomae et al.
Patent Abstracts of Japan, vol. 15, No. 499 (Kokai 3-215893) (Sep. 20, 1991), Appl. No. JP3215893, Inventor: Isamu, Title="Outline Character Correction System", p. 1.
Ishida Yoshihiro
Yoshitani Akihiro
Boudreau Leo
Canon Kabushiki Kaisha
Tadayon Bijan
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