This paper proposes a holographic blind watermarking algorithm of the three-dimensional mesh model basedon QR decomposition. Firstly the three-dimensional model is pre-processed by moving the model center to the coordinateorigin and doing PCA analysis. Secondly the model’s geometric feature matrix is constructed by using the distance fromthe three-dimensional mesh model vortex to the model center in the column coordinate system. Then the watermarking informationgenerated by the holographic encrypted technology is embedded into the normalized and blocked model’s geometricfeature matrix based on QR decomposition. Finally the watermark is embedded into three-dimensional mesh modelvia inverse QR decomposition and inverse normalization operation. The experimental results indicate that this algorithmcan resist translation, rotation, scaling, vertex reordering, noise and cropping attack, which has good robustness. Thismethod can effectively protect the three-dimensional mesh model intellectual property.
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