Image analysis – Pattern recognition – Feature extraction
Patent
1995-11-21
1996-11-26
Boudreau, Leo
Image analysis
Pattern recognition
Feature extraction
382199, 382298, G06K 948
Patent
active
055794050
ABSTRACT:
A method and an apparatus for forming an image by contour vector processing includes scanning a pixel along an edge of the image formed by pixels having a first pixel state and pixels having a second pixel state, discriminating one pixel state of the scanned pixel, and determining the pixel states of pixels bordering the discriminated pixel in the case the discriminated pixel has a first pixel state. Contour vectors are extracted between the discriminated pixel having the first pixel state and pixels having a second pixel state bordering the discriminated pixel which are closer to the discriminated pixel than to the bordering pixels, and outputting the extracted contour vectors to form the image.
REFERENCES:
patent: 4956869 (1990-09-01), Miyatake et al.
patent: 4961231 (1990-10-01), Nakayama et al.
patent: 5038385 (1991-08-01), Kasahara
patent: 5086484 (1992-02-01), Katayama et al.
patent: 5144682 (1992-09-01), Nakamura
Ishida Yoshihiro
Katayama Akihiro
Yamakawa Junichi
Boudreau Leo
Canon Kabushiki Kaisha
Tran Phuoc
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