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基于距离特征与体积积分不变量的三维模型信息隐藏算法
任帅,苏东旭,徐振超,范傲雄,张弢
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(长安大学信息工程学院 西安 中国 710064;长安大学电子与控制工程学院 西安 中国 710064)
摘要:
为了提高三维模型信息隐藏算法的鲁棒性和嵌入容量,使得三维模型可以隐藏大容量的秘密信息,本文提出一种基于距离特征和体积积分不变量的三维模型信息隐藏算法。算法的主要思想是:首先使用距离特征这种三维模型全局变量,利用相似性公式对多个三维模型载体进行分类;其次使用体积积分不变量计算三维模型顶点的球体内外体积,对三维模型顶点进行分类;最后通过修改三维模型顶点的凹凸程度把秘密信息隐藏到三维模型中,发送给接受者进行提取。实验结果表明本文算法具有很好的鲁棒性和不可见性。
关键词:  信息隐藏  三维模型  距离特征  体积积分不变量
DOI:10.19363/J.cnki.cn10-1380/tn.2020.09.08
投稿时间:2019-08-04修订日期:2020-03-19
基金项目:国家自然科学基金资助项目金(No.61702050);中央高校“双一流”引导专项(No.300104292405);2019年研究生教育教学改革建设专项基础建设项目(No.300103190640);2020年度中央高校基本科研业务费资助项目(自然科学类)计划高新技术研究培育项目(No.300102240208);2020年研究生教育教学改革资助项目(No.300103102417);大学生创新创业训练计划项目资助(No.201910710079)。
Three-dimensional model information hiding algorithm based on distance feature and volume integral invariant
REN Shuai,SU Dongxu,XU Zhenchao,FAN Aoxiong,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
Abstract:
In order to improve the robustness and embedding capacity of 3D model information hiding algorithm, and make 3D model can hide large-capacity secret information, a 3D model information hiding algorithm based on distance feature and volume integral invariant was proposed here. The main idea of the algorithm was as follow. Firstly, the global variable distance feature of 3D model and similarity formula were used to classify several 3D model carriers. Secondly, the volume integral invariants were used to calculate the volume inside and outside the sphere of the 3D model, and the 3D model vertices were classified. Finally, the secret information was hidden into the 3D model by modifying the degree of convexity of the vertices of 3D model, and was sent to the recipient for extraction. The experimental results show that the proposed algorithm has good robustness and invisibility.
Key words:  information hiding  3D models  distance feature  volume integral invariant