Visible Reversible Watermarking for 3D Models Based on Mesh Subdivision

Abstract

Visible reversible watermark can clearly identify the copyright of digital works, and can completely remove the watermark when it is needed. It can be utilized for visibly labeling the copyright of digital host. To protect the copyright of 3D mesh model, a visible reversible watermarking based on mesh subdivision is proposed in this paper. First, the smooth area of the 3D mesh model is projected onto the 2D plane for cropping and subdivision to achieve the embedding of the visible watermark. Then, by comparing the vertex information of the original model and the model with visible watermark, the index of the visible watermark vertex is obtained, and it is embedded as a reversible watermark to the rest of the model. The visible watermark can be removed by deleting the vertices corresponding to the reversible watermark. Experimental results and analysis show that the visible watermark and the host are tightly integrated, and it is robust to translation, rotation, scaling, mesh subdivision, and mesh smoothing. When unauthorized users try to delete the watermark or steal the 3D mesh model, the host will be destroyed and the model will be unusable. It has potential application in the copyright protection of the 3D mesh model.