一种零高分辨率3D网格模型的信息隐藏算法  

Zero-high-resolution Information Hiding Algorithm for 3D Mesh Model

作　　者：任帅[1] 王萌 范傲雄 高泽 徐解 Shahzad KHURRAM 张弢[2] REN Shuai;WANG Meng;FAN Ao-xiong;GAO Ze;XU Jie;Shahzad KHURRAM;ZHANG Tao(School of Information Engineering,Chang’an University,Xi’an 710064,China;School of Electronic and Control Engineering,Chang’an University,Xi’an 710064,China)

机构地区：[1]长安大学信息工程学院,西安710064 [2]长安大学电子与控制工程学院,西安710064

出　　处：《计算机科学》2020年第7期328-334,共7页Computer Science

基　　金：国家自然科学基金(61702050);中央高校“双一流”引导专项(300104292405);2019年研究生教育教学改革建设专项基础建设项目(300103190640);大学生创新创业训练计划项目(201910710079,201810710052,201810710060,201810710215,201810710224)。

摘　　要：针对目前3D网格模型信息隐藏算法抗分析性弱的问题,提出一种零高分辨率的信息隐藏算法。首先,利用改进半边折叠网格简化算法对网格模型进行多分辨率分析,将3个分辨率层表示为High-layer,Mid-layer,Low-layer;其次,在High-layer进行同心球面分割,提取特征向量,在Mid-layer计算顶点突出度,确定嵌入信息的特征点;再次,通过将特征向量中特征值的最高位与Chebyshev置乱的加密信息建立联系以形成关联信息;最后,利用分段映射函数将关联信息嵌入到特征点球面坐标r值的DCT变换交流系数中。算法将高分辨率层的特征向量与置乱信息所构建的关联信息隐藏于能量小于15%中分辨率层的鲁棒特征点的仿射变换不变量中,有利于算法的不可见性、鲁棒性和抗分析性。采用一阶拉普拉斯平滑的隐写分析方法检测不到点、面特征的明显变化,表明所提算法的抗分析性好。Aiming at weak anti-analysis of current information hiding algorithm for 3D mesh model,a zero-high-resolution information hiding algorithm was proposed.Firstly,multi-resolution analysis based on the improved half-fold mesh simplification algorithm is manipulated on mesh model to decompose it into High-layer,Mid-layer,Low-layer.Secondly,the feature vectors are extracted by concentric sphere segmentation in High-layer,and the feature points embedded in information are determined by calculating vertex saliency in Mid-layer.Thirdly,the highest bit of the eigenvalue is obtained circularly from the feature vector and then correlatedwith the encrypted information scrambled by Chebyshev to form the associated information.Finally,the associated information is embedded into the DCT transform AC coefficient of the feature point spherical coordinate r value using the piecewise mapping function.The algorithm hides the associated information constructed by feature vector of High-layer and scrambled information intothe affine transform invariant of robust feature points in Mid-layer with less than 15%energy,which is beneficial to the invisibility,robustness and anti-analysis of algorithm.The obvious changes of point and surface features are undetected by the first-order Laplacian smoothing steganalysis method,which means that the proposed algorithm is of good anti-analysis ability.

关 键 词：零高分辨率信息隐藏 半边折叠网格简化 同心球面分割 DCT变换 抗分析性 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构] TP306.1[自动化与计算机技术—计算机科学与技术]