用于支票印鉴鉴别的图像预处理及配准算法

Preprocessing and Registration Algorithm for Check Seal Verification

为了消除支票印鉴自动鉴别系统中由于不同的盖印条件引起的印鉴质量变化,该文提出了一种印鉴图像预处理及配准算法,即首先利用彩色信息将印鉴灰度图从支票背景中分割出来,然后利用基于梯度值的动态阈值实现印鉴图像的二值化。为了消除印鉴中存在的笔划连接和笔划残缺,该文提出了一种笔划填充和骨架校正算法。实验证明该算法具有较强的适应性、可靠性和实用性。

This paper proposes a preprocessing and registration algorithm of seal imprint for absorbing the various impression quality depending on the various affixing conditions in the automatic seal imprint verification(ASIV)system.Firstly,the gray image of seal imprint is extracted form check background by using color information.Then,the binary image is generated by using dynamic threshold drawn from the grads information.An algorithm of stroke refilling and skeleton emendation is proposed for removing the patterns of stroke joint and stroke break.Results show that the approach has good adaptability and reliability,and it is feasible for practical applications.