A Local Space Based Watermarking Algorithm for Three Dimensional Meshes

Watermarking for 3D models is a challenging topic in the research of watermarking. Difficulties came up on maintaining pretty robustness and implementing blind detection of watermarks in previous related work. In order to enhance the robustness and achieve blind detection, this paper proposed a novel blind watermarking algorithm for 3D models based on the triangular meshes in the local space. The scheme embedded the watermark by modifying the location of vertices within their related space. With this approach, watermarks could be detected without the original model. Experimental results showed that the algorithm guaranteed both satisfactory visual quality and robustness, with good performance against various attacks such as translation, rotation, scaling, model cropping, vertex permutation, etc.