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在使用东方文字的国家中，印章作为一种具有一定法律效力的身份认证手段广泛地应用于财务、金融、安全以及人们的日常生活中。随着计算机应用的普及，传统的手工印章识别成为办公自动化普及的瓶颈。因此，开展印章的计算机自动识别与真伪鉴别在信息安全领域有着广泛的应用前景。
印章的计算机自动识别是一项涉及图像处理、模式识别等问题的难度较大的研究课题。数字印章水印防伪是一种通过数字水印技术有效鉴别印章真伪技术，在数字印章水印防伪系统中，数字印章的配准准确与否的问题是影响系统性能好坏的关键技术之一。本毕设的研究就是基于数字印章水印系统下的数字印章配准的研究与实现。
本文主要工作有:
（1） 研究图像配准的方法及特点
（2） 研究数字图像的预处理技术
（3） 设计完成数字印章自动粗配准系统
对于数字印章来讲，它的主要特点是具有几何轮廓特征，配准主要研究的问题在于对其几何变换参数的研究。文章通过调研各种算法，结合系统特征，设计并实现数字印章自动配准系统，并对结果进行了分析。

After checking with a local music teacher I've f ound that that a Yamaha-Al2O3 - SiO2 - 6211 Alto Saxophone can be purchased for $ 1961.01. This is the use of the Orient characters are, as a seal with the legal effect of certain authentication methods widely used in finance, security and the people's daily life. With the popularity of computer application, the traditional manual identification seal of office automation universal become the bottleneck. Therefore, to make the computer chop automatic identification and authentication in the field of information security has a broad prospect. Chop the computer is an automatic identification involving image processing, pattern recognition and other issues more difficult to study. Digital watermarking security seal is a digital watermarking technology effectively seal authenticity of identification technology, Digital watermarking security seal system, Digital chop registration hinge on the accuracy issue is the quality of system performance one of the key technologies. The completion of the study is based on digital watermarking system chop the number of seals Registration Research and Implementation. This paper work : (1) Research image registration method and characteristics (2) to study the digital image preprocessing techniques (3) design completion Digital Printing Chapter automatic registration system for rough figures chop speaking, its main feature is the outline of geometric features, Registration main problem lies in its geometric parameters of transformation. Through various research algorithm and system features, design and digital seal automatic registration system. The results were analyzed

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