联机中文签名鉴定的一种局部弹性匹配方法

A Local Elastic Matching Method for On line Chinese Signature Verification

本文提出了一种用于联机中文签名鉴定的局部弹性匹配方法。将签名切分为笔段，以包含特征的笔段为基元。基元抽取之后，首先根据一些比较简单的静态特征，采用动态规划方法寻求待测签名和参考签名基元之间的最优对应关系，根据最优对应关系，再同时考虑签名的静态和动态两类特征，对待测签名和参考签名的基元进行局部弹性匹配。在对６８０个测试签名样本的识别实验中，取得了９２．６％的平均正确识别率，在４８６／２５微机上的平均识别时间为０．９秒，初步显示了本方法的可行性。

A local elastic matching method for on line Chinese signature verification is presented in this paper.The signature is segmented into strings. The strings including their features are regarded as primitives,After primitive extraction,according to some relatively simple static features,the dynamic programming method is used to find out the optimal corresponding relation between the primitives of the test signature and the reference signature.According to the optimal corresponding relation,the local elastic matching method is used to compare the primitives of the test signature with those of the reference signature,taking both the static and the dynamic features into account.For a test data set containing 680 signature samples,average correct recognition rate of 92.6% is obtained.The average recognition time is 0.9 second wtih a 486/25 microcomputer.The experiment results reveal, the feasibility of the proposed method.