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IMPROVEMENT IN HANDWRITTEN NUMERAL STRING RECOGNITION BY SLANT NORMALIZATION AND CONTEXTUAL INFORMATION

机译:通过倾斜归一化和上下文信息改进手写数字字符串识别

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摘要

This work describes a way of enhancing handwritten numeral string recognition by considering slant normalization and contextual information to train an implicit segmentation­based system. A word slant normalization method is modified in order to improve the results for handwritten numeral strings. We assume that each connected component (CC) in the string has its own slant. The slant and contour length of each CC are used for obtaining the mean slant of the string. Both the original and modified methods are evaluated by means of some interesting analyses on the NIST SD19 database. These analyses show (a) the positive impact of slant correction on the number of overlapping numerals in strings, and (b) the difference in normalizing isolated numerals based on the slant estimated from their own images and the slant estimated from their original string images. Slant normalization and contextual information regarding string slant and digit size variations within the string are used to train numeral HMMs. Preliminary string recognition results, produced by a system under construction, are shown.
机译:这项工作描述了一种通过考虑倾斜归一化和上下文信息来训练基于隐式分段的系统来增强手写数字字符串识别的方法。修改了词倾斜归一化方法,以改善手写数字字符串的结果。我们假设字符串中的每个连接的分量(CC)都有自己的倾斜度。每个CC的倾斜度和轮廓长度用于获得琴弦的平均倾斜度。通过对NIST SD19数据库进行一些有趣的分析来评估原始方法和改进方法。这些分析显示(a)倾斜校正对字符串中重叠数字的数量的积极影响,以及(b)基于从其自身图像估计的倾斜度和从其原始字符串图像估计的倾斜度对孤立数字进行归一化的差异。关于字符串内的字符串倾斜和数字大小变化的倾斜归一化和上下文信息用于训练数字HMM。显示了由在建系统产生的初步字符串识别结果。

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