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针对特高压设备三维网格模型提出一种基于量化索引调制机制的自适应鲁棒水印算法,实现对具有自主知识产权的特高压设备三维网格模型版权保护。该算法首先将模型变换到仿射不变空间;结合模型水印嵌入顶点的离散法向量和局部粗糙度,通过自适应量化方式实现水印嵌入。实验结果表明,该算法能有效抵抗加性噪声、仿射变换、网格压缩、网格滤波等多种网格攻击,具有较强不可感知性和鲁棒性。
Aiming at the three-dimensional grid model of UHV equipment, an adaptive robust watermarking algorithm based on quantization index modulation is proposed to realize copyright protection of 3D grid model of UHV equipment with independent intellectual property rights. The algorithm first transforms the model to the affine invariant space. The discrete watermark embedding vertices’ discrete normal vectors and local roughness are used to realize the watermark embedding through adaptive quantization. Experimental results show that the proposed algorithm can effectively resist many kinds of grid attacks such as additive noise, affine transformation, grid compression and grid filtering, and has strong imperceptibility and robustness.