对应点集移动相对性建模于脱机签名鉴定研究

提出并论证了欧氏空间中签名的对应点集具有移动相对性,基于该原理构建了一种新的脱机签名鉴定模型,并研究了签名间对应点集获取的方法。在鉴定方案中,待鉴定的脱机签名图像和参考样本的签名图像可以看作欧氏空间内两个不同坐标系中的图像,两者间能够建立相对应的点集合,而欧氏空间平面图像其对应点集具有确定的约束关系,利用该约束关系建立模型可以反映出对应点集移动相对性的大小,因此可以利用该值的差异进行签名真伪鉴定。该方法对于真签名的数量要求较低,并且不需要伪签名来进行训练,适用于脱机签名鉴定中存在的极少样本集情况。实验采用中、英文两种签名数据库验证了该方法的有效性。

Off-line Signature Verification Modeling on Movement Relativity with Corresponding Point Sets

On modeling off-line signature verification with our presented lemma,the movement relativity of images with the corresponding sets in different coordinates of Euclidian space was firstly proposed and proved.And how to acquire the corresponding sets was studied.In the verification scheme,the verification sample and the reference sample could be distributed into two different coordinates which were the corresponding point sets with certain restrictions.Then the verification model with these restrictions was constructed,which could reflect the movement relativity of the corresponding point sets which were used to verify.This method needed low number of true signatures and did not require pseudo-signatures for training.Therefore,the scheme was applied to the very small number of training samples with true ones only.The experimental results with two databases of Chinese and English signatures confirm the effectiveness of the proposed technique.