Development of Automatic High Performance Seal Imprint Verification system with Imprint Quality Identification Function

这项研究项目已进行了两年多（1990-1991年）。本研究的主要目的是开发一套能适用于不同品质印鉴的自动印鉴验证系统。我们能够达到这个研究项目的目的。本研究项目取得的成果总结如下：1.提出了一种基于印章灰度直方图特征的印章质量识别方法。通过对不同质量的实际印章印文的质量鉴定实验，证实了该方法的质量鉴定结果与文献鉴定人员的鉴定结果相吻合.本文在原有的印鉴自动识别方法的基础上，增加了印鉴质量的识别过程，提出了一种新的印鉴自动识别方法。首先识别被检印章的每个部分区域，然后仅将被检印章的质量好的部分区域与配准的部分区域进行验证。该方法的一个主要优点是可以对各种规格的印鉴进行检验.在此基础上，利用微机和图像处理单元组成的小型硬件系统，实现了具有实际应用价值的印章自动识别系统。实验结果表明，该系统在实际应用中是可行的。

This research project has been carried out over two years (1990-1991). A major aim of this research project is to develop an automatic seal imprint verification system which is adoptable to seal imprints with various qualities. We were able to achieve our aim of this research project. The summary of results obtained by the research project is as follows :1. We developed the quality identification method of seal imprint on the basis of characteristics of its gray level histogram. Through the quality identification experiment using actual seal imprints with various qualities, it is confirmed that the quality identification result by this method coincides with the result by document examiners.2. We developed the new method for automatic seal imprint verification by adding the imprint quality identification process to our previous verification method. Each partial region of an examined seal imprint is identified first, and then only good quality partial regions of an examined imprint are verified with registered one. A major advantage of this method is that this method can verify seal imprints with various flaws.3. On the basis of above result, automatic seal imprint verification system for practical applications was realized by using a small hardware system which consists of a personal computer and an image processing unit. Experimental results show that this system might be feasible for practical applications.