中文摘要：

对于基于三维模型信息隐藏算法在几何攻击中鲁棒性差的问题，提出一种基于三维模型球型分割的信息隐藏算法。首先，利用主元分析、球面坐标转换、球型分割、分区排序等对三维模型进行预处理；然后，计算立体分区中法向量变化较大的点作为特征点，根据待嵌入秘密信息量对特征点进行小波变换；最后，将经过置乱操作的秘密信息嵌入预处理后的载体中生成含密三维模型。实验结果表明，算法不可见性较好，对旋转、随机加噪、重网格以及其他常见攻击具有良好的鲁棒性。

英文摘要：

Aiming at the problem of weak robustness to geometric attack in 3D model information hiding algorithms, an information hiding algorithm based on 3D model spherical segmentation was proposed. Firstly, the 3D model was preprocessed by principal component analysis, spherical coordinate transformation, spherical segmentation and partition sorting. Then, the points with larger normal vector in stereo partition are taken as feature points. The feature points were carried out wavelet transform according to the amount of secret information to be embedded. Finally, the secret information after scrambled operation was embedded into the pre-processed carrier to generate the secret 3D model. The experimental results show that the algorithm is invisible and has good robustness to random noise, heavy mesh and other common attacks.