融合防伪线的高仿圆形印章配准与鉴别研究  

Research on registration and identification of high imitation circular seal with anti-counterfeit line

作　　者：文琴 何文孝[1] WEN Qin;HE Wenxiao(School of Artificial Intelligence, Neijiang Normal University, Neijiang, Sichuan 641100, China)

机构地区：[1]内江师范学院人工智能学院,四川内江641100

出　　处：《内江师范学院学报》2022年第2期53-61,共9页Journal of Neijiang Normal University

基　　金：内江师范学院校级科研项目(2020YB34)。

摘　　要：防伪线在印章上起着防伪作用,而传统的圆形印章印迹提取和鉴别会将印章防伪分割的线段忽略,这直接影响了最后高仿圆形印章的鉴别准确率.为此,提出了融合防伪线的图像去燥算法对提取的印迹进行二次处理以得到较完整的圆形印章印迹.而防伪线主要体现于外围轮廓的缺口,缺口的特征主要是被分割的线形成四个角,为此将得出的印迹通过Canny边缘检测算法得到特征轮廓;处理后的印迹利用Harris算法提取角点,以角点为中心缩小SURF特征点搜索范围加快运算速度,并用RANSAC算法对特征集进行二次过滤,进一步加快配准速度;最后利用防伪线分割外围轮廓的特点,对外围轮廓进行分段比较以提升鉴别的准确性.仿真实验结果表明,该算法配准速度快,鉴别准确率高.The anti-counterfeiting thread plays an anti-counterfeiting role on the seal,and the traditional circular seal imprint extraction and identification is blamed for its ignorance of the line segment of the anti-counterfeiting division of the seal,which thus directly affects the identification accuracy of the final high imitation circular seal.For this reason,an image desiccation algorithm fused with anti-counterfeiting lines is proposed to perform secondary processing on the extracted imprints to obtain a more complete circular seal imprint.The anti-counterfeiting line is mainly incorporated in the gap of the outer contour.The feature of the gap is mainly that the divided line forms four corners.For this reason,the imprint obtained is used to obtain the characteristic contour through the Canny edge detection algorithm;the treated imprint uses the Harris algorithm to extract the corners.Use the corner point as the center to narrow the search range of SURF feature points to speed up the calculation speed,and use the RANSAC algorithm to filter the feature set twice to further accelerate the registration speed;finally use the characteristics of the security line to segment the outer contour to segment the outer contour and compare section to section to improve the accuracy of identification.The simulation experiment results show that the algorithm has fast registration speed and high identification accuracy.

关 键 词：防伪线 印迹 图像配准 CANNY边缘检测算法 HARRIS算子 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]