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基于段匹配差异观察值的HMM在线签名认证方法研究

, PP. 555-560

Keywords: 在线签名认证,动态时间规整(DTW),隐马尔可夫模型(HMM)

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Abstract:

提出一种用签名的分段差异值作为隐马尔可夫模型(HMM)观测值的在线签名认证应用方法。首先,采用双向后向合并DTW算法确定签名中关键点之间的对应关系。然后,采用经典DTW度量签名中各种细微的差异,用这些DTW差异值作为观测值训练HMM模型。将模型状态的意义定义为相似程度,将状态转移结构设定为全概率转移。在SVC2004签名数据库上,验证了该方法的有效性。

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