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

Three-dimensional model information hiding algorithm based on distance feature and volume integral invariant

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。

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.