Image analysis – Image segmentation – Using projections
Patent
1993-10-12
1997-12-09
Boudreau, Leo
Image analysis
Image segmentation
Using projections
382176, 358462, G06K 960
Patent
active
056968418
ABSTRACT:
This character recognition method is capable of determining the direction of row of characters, applicable to a language which can be written in horizontal or vertical direction, such as Japanese. The method takes projections in both directions, by counting black pixels, and compares the obtained counts with a threshold value (or with each other). The text is identified as horizontally or vertically written, respectively, according as the count exceeds the threshold value more in the horizontal or vertical direction. A projection is taken again in the perpendicular direction, after the writing direction is determined, to extract each character, which is subjected to character recognition in known manner. Thus the method can achieve automatic recognition, without instruction of the direction of writing by the operator.
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Boudreau Leo
Canon Kabushiki Kaisha
Chang Jon
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