Information Hiding Algorithm Based on Spherical Segmentation of 3D Model

For the problem of poor robustness of geometric attack based on 3D model information hiding algorithm, an information hiding algorithm based on 3D model spherical segmentation is proposed. The algorithm firstly uses the principal component analysis, spherical coordinate conversion, spherical segmentation, partition sorting, etc. to preprocess the 3D model, calculates the points with large normal vector changes in the three-dimensional partition as the feature points, and matches the feature points according to the amount of secret information to be embedded After wavelet transform, the secret information after the scrambling operation is embedded in the pre-processed carrier to generate a dense three-dimensional model. Experimental results show that the algorithm is invisible and has good robustness to rotation, random noise, heavy mesh, and other common attacks.