特征线比例的倾斜摄影三维模型数字水印算法  

Digital watermarking algorithm for oblique photography 3Dmodel based on feature line proportion

作　　者：贡威腾 朱长青[1] 崔翰川 任娜[1] GONG Weiteng;ZHU Changqing;CUI Hanchuan;REN Na(Key Laboratory of Virtual Geographic Environment of Ministry of Education,Nanjing Normal University,Nanjing 210023,China;Nanjing Geomarking Information Technology Co.,Ltd.,Nanjing 210034,China)

机构地区：[1]南京师范大学虚拟地理环境教育部重点实验室,南京210023 [2]南京吉印信息科技有限公司,南京210034

出　　处：《测绘科学》2022年第4期80-86,152,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金面上项目(42071362,41971338);江苏省自然科学基金面上项目(BK20191373)。

摘　　要：针对倾斜摄影三维模型的版权保护需求,该文提出一种基于特征线比例的倾斜摄影三维模型数字水印算法。将由切比雪夫(Chebyshev)混沌系统生成的序列作为水印信息,对模型的垂直向特性进行剖析,选择近似垂直于地面的三角网线间的比例作为水印嵌入特征,通过修改奇偶性的方式嵌入水印信息。水印的检测过程不需要原始模型的参与,实现了盲水印。实验表明,该算法对几何攻击以及噪声等攻击具有较强的鲁棒性,可应用于倾斜摄影三维模型的版权保护。Aiming at the copyright protection 3Dmodel of oblique photography requirements,in this paper,a digital watermarking algorithm is proposed for 3D model of oblique photography based on the feature line proportion.The sequence generated by the Chebyshev chaotic system was used as the watermark information,and the vertical upward characteristics of the model were analyzed.The ratio between the triangle network lines approximately perpendicular to the ground was selected as the watermark embedding feature,and the watermark information was embedded by modifying the parity.The detection process of the watermark did not require the participation of the original model,so this algorithm implemented a blind watermark.Experiments showed that this algorithm had strong robustness to geometric attacks,noise and other attacks.This algorithm could be applied to the copyright protection of 3Dmodels of oblique photography.

关 键 词：三维模型 倾斜摄影 特征选择 数字水印 

分 类 号：P237[天文地球—摄影测量与遥感]