基于扫频光学相干层析的墨迹鉴别方法研究  

Identification of Ink Marks Using Swept Source Optical Coherence Tomography

作　　者：吴彤[1,2] 吴超[1,2] 潘瑞斌 张磊 赫崇君[1] 王吉明 路元刚[1] 刘友文[2] Tong Wu;Chao Wu;Ruibin Pan;Lei Zhang;Chongjun He;Jiming Wang;Yuangang Lu;Youwen Liu(Key Laboratory of Space Photoelectric Detection and Perception,Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 210016,China;College of Science,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 211106,China)

机构地区：[1]南京航空航天大学空间光电探测与感知工业和信息化部重点实验室,江苏南京210016 [2]南京航空航天大学理学院,江苏南京211106

出　　处：《中国激光》2020年第11期159-166,共8页Chinese Journal of Lasers

基　　金：中央高校基本科研业务费专项(NS2020067);江苏省研究生科研与实践创新计划项目(SJCX18_0111);南京航空航天大学空间光电探测与感知工业和信息化部重点实验室开放课题资助(NJ2020021-5);中央高校基本科研业务费资助(NJ2020021)

摘　　要：当前墨迹伪造造成的经济损失逐年增加,基于此,提出一种基于扫频光学相干层析(SSOCT)的墨迹鉴别方法。使用自主搭建的SSOCT成像系统采集墨迹样品背向反射光强随深度下降的数据,通过数据拟合获得墨迹层的衰减系数,用以区分同种颜色不同品牌墨水在白纸上书写的墨迹。实验测得百乐牌墨迹衰减系数范围为0.1333~0.1434,得力牌墨迹衰减系数范围为0.1501~0.1695,英雄牌墨迹衰减系数范围为0.1748~0.1892。重建了使用三种墨水书写的“OCT”字母的X-Y横截面图像,实现了墨迹的鉴别与区分,验证了方法的可行性。At present,the economic loss caused by the forgery of ink marks is increasing annually.This study presents a method for identifying ink marks using swept source optical coherence tomography(SSOCT).To acquire the back-scattered light intensity from ink marks written on white paper,a custom-built SSOCT system was used.The attenuation coefficient of each ink mark was obtained by data fitting,which was used to distinguish ink marks written with different brands of ink of the same color.Experiments show that the attenuation coefficient of PILOT ink,Deli ink,and Hero ink is in the range of 0.1333--0.1434,0.1501--0.1695,and 0.1748--0.1892,respectively.We reconstructed X-Y cross-sectional images of characters written using different brands of ink.The ink marks can be distinguished successfully by the proposed method,which validates its feasibility.

关 键 词：测量 墨迹鉴别 扫频光学相干层析 衰减系数 阈值处理 

分 类 号：TB133[机械工程—光学工程]