Quantitative Evaluation of Improved Global Interpolation in the Segmentation of Handwritten Numbers Overlapping a Border (Special Issue on Character Recognition and Document Understanding)

概要

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The global interpolation method we proposed can extract a handwritten alpha-numeric character pattern even if it overlaps a border. Our method interpolates blank segments in a character after borders are removed by evaluating segment pattern continuity and connect-edness globally to produce characters with smooth edges. The main feature of this method is to evaluate global component label connectivity as pattern connect-edness. However, it is impossible for the method to interpolate missing superpositioning loop segments, because they lack segment pattern continuity and they have already had global component label connectivity. To solve this problem, we improved the method by adding loop interpolation as a global evaluation. The evaluation of character segment continuity is also improved to achieve higher quality character patterns. There is no database of overlapping characters, so we also propose an evaluation method which generates various kinds of overlapping numerals from an ETL database. Experimental results using these generated pat-terns showed that the improved global interpolation method is very effective for numbers that overlap a border.
社団法人電子情報通信学会の論文
1996-05-25