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Preprocessing and feature extraction for a handwriting recognition system

机译:手写识别系统的预处理和特征提取

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Offline cursive script word recognition has received increasing attention during the last years. Impressive progress has been achieved in reading isolated single characters during the last decade. Cursive script recognition still lacks a good recognition rate. Since there is a high variability in unconstrainted handwritten script words, the domain is much more difficult than single character recognition. To achieve acceptable results, the context has to be restricted by a given lexicon of all possible words. The only accessible information is the binary image of the cursive script word. Since handling of raster data is cumbersome, connectivity analysis is applied as a first processing step. Thereafter it is necessary to reduce the variability as much as possible without losing relevant information. Therefore, some normalization steps angle, rotation stroke width, and size. The normalization techniques of the authors' system and the subsequent feature extraction are presented. The proposed algorithms are every efficient because they are based on the contour information provided by connectivity analysis.
机译:离线法学脚本Word识别在过去几年中受到了越来越长的关注。在过去十年中阅读孤立的单一人物已经实现了令人印象深刻的进展。草书脚本识别仍然缺乏良好的识别率。由于非纵曲的手写脚本单词存在高度变化,因此域中的域比单个字符识别要困难得多。为了获得可接受的结果,必须通过所有可能的单词的给定词位限制上下文。唯一可访问的信息是法学脚本字的二进制图像。由于光栅数据的处理是麻烦的,因此连接分析作为第一处理步骤。此后,必须尽可能地降低可变性而不会失去相关信息。因此,一些归一化步骤角度,旋转行程宽度和尺寸。提出了作者系统的标准化技术和随后的特征提取。所提出的算法是每个有效的,因为它们基于通过连接分析提供的轮廓信息。

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