The application of grey model in 3D model blind watermark

In order to solve the copyright issues brought by the distributed rendering system for three-dimensional model, we present this blind watermarking algorithm with high transparency and robustness. In the generation step, we compressed the original watermark information using the UGM model of gray system, for reducing the amount of information embedded in watermark. In the embedding step, we replace some bits in the model feature field with the watermarking signal so as to extract watermark without the original data. Experimental results show good transparency and robustness against attacks.