Image analysis – Image transformation or preprocessing – Measuring image properties
Patent
1995-09-27
1996-08-13
Boudreau, Leo
Image analysis
Image transformation or preprocessing
Measuring image properties
382296, 382256, G06K 932
Patent
active
055464793
ABSTRACT:
A method of determining unintended inclination in an image of characters that is to be processed by a device such as a copy machine, a facsimile machine, or an optical character recognition system. An image of characters is generated, and expansion is performed on this image the optimal number of times. The number of expansions is based on the differences in the area of the non-background portion of the image at various stages of expansion. Next, the major direction of inclination is determined for the image. The inclination angle of the image is then determined based on the inclination factors of the character lines for various zones in the image.
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Srihari S N et al., "Eighth Internat, Copnf. on Pattern Recognition Proceedings", France, Oct. 27-31, 1986 pp. 434-436.
Nakamura O et al "A Chara, segmentation alogorithm for mixed mode communication ", Jul.-Aug. 1985.
Kawanaka Seido
Naito Hiroyoshi
Yoshikawa Mituo
Anderson David R.
Boudreau Leo
Ezel Inc.
Sharp Corporation
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