中山大学学报（自然科学版）Issue(2)：38-43,6.
一种基于分块DCT变换的三维网格模型半脆弱水印算法
A Semi-fragile Watermarking Scheme for 3 D Mesh Models Based on Partitioned DCT
摘要
Abstract
Semi-fragile watermark has wider applicability,as it can distinguish malicious tampering and normal mesh processing.Most present algorithms can only tolerate a few types of normal mesh processing. A novel semi-fragile watermarking algorithm based on mesh content is proposed.In this algorithm,mesh is partitioned into some sub-meshes,and semi-fragile watermarks are hidden in DCT coefficients of each sub-mesh.When mesh is tampered,the position occurred can be located by matching the extracted wa-termark sequence and original watermark sequence.Experimental results show that the proposed algo-rithm can tolerate various mesh normal processing,such as mesh RST similar transforming,and quantiza-tion of vertex coordinates with low intensity,while is sensitive to malicious tampering.The proposed algo-rithm can also locate the tamering positions with relatively high precision.关键词
三维水印/网格水印/半脆弱水印/DCT变换/内容认证Key words
3 D watermark/mesh watermark/semi-fragile watermark/DCT/content authentication分类
计算机与自动化引用本文复制引用
徐涛,罗中良,陈志芳,蔡彬滔..一种基于分块DCT变换的三维网格模型半脆弱水印算法[J].中山大学学报（自然科学版）,2014,(2):38-43,6.基金项目
国家自然科学基金资助项目（61170193）；惠州学院重点学科建设资助项目；广东省高等学校教学质量与教学改革工作本科类项目 （）
