Abstract: Because of its large differences in writing style, context-independency and high recognition accuracy requirement, free handwritten digital identification is still a very difficult problem. Analyzing the characteristic of handwritten digits, this paper proposes a new handwritten digital identification method based on combining structural features. Given a handwritten digit, a variety of structural features of the digit including end points, bifurcation points, horizontal lines and so on are identified automatically and robustly by a proposed extended structural features identification algorithm, and a decision tree based on those structural features is constructed to support automatic recognition of the handwritten digit. Experimental result demonstrates that the proposed method is superior to other general methods in recognition rate and robustness.

Key words: handwritten digital identification, combining structural feature, decision trees, pattern recognition

摘要： 自由手写体因其书写风格差异大、上下文无关及识别准确度要求高等原因导致其识别难度大的问题。针对手写体数字识别的特点及要求，提出一种新的基于组合结构特征的自由手写体数字识别算法。通过扩展的字符结构特征识别算法自动、鲁棒地提取手写体数字字符端点、分叉点、横线等多种结构特征，并组合应用这些结构特征构造决策树完成手写体字符的自动识别。实验结果表明基于组合结构特征的自由手写体数字识别算法的鲁棒性和识别率明显优于传统方法。

关键词: 手写体数字识别, 组合结构特征, 决策树, 模式识别