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DAS
2008
Springer

Affine Invariant Recognition of Characters by Progressive Pruning

14 years 28 days ago
Affine Invariant Recognition of Characters by Progressive Pruning
There are many problems to realize camera-based character recognition. One of the problems is that characters in scenes are often distorted by geometric transformations such as affine distortions. Although some methods that remove the affine distortions have been proposed, they cannot remove a rotation transformation of a character. Thus a skew angle of a character has to be determined by examining all the possible angles. However, this consumes quite a bit of time. In this paper, in order to reduce the processing time for an affine invariant recognition, we propose a set of affine invariant features and a new recognition scheme called "progressive pruning." The progressive pruning gradually prunes less feasible categories and skew angles using multiple classifiers. We confirmed the progressive pruning with the affine invariant features reduced the processing time at least less than half without decreasing the recognition rate.
Akira Horimatsu, Ryo Niwa, Masakazu Iwamura, Koich
Added 19 Oct 2010
Updated 19 Oct 2010
Type Conference
Year 2008
Where DAS
Authors Akira Horimatsu, Ryo Niwa, Masakazu Iwamura, Koichi Kise, Seiichi Uchida, Shinichiro Omachi
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