一种基于部分基矩阵稀疏约束非负矩阵分解的抵抗大强度剪切攻击视频水印构架
doi: 10.3724/SP.J.1146.2011.01117
A Video Watermarking Framework Resistant to Super Strong Cropping Attacks Based on NMF with Sparseness Constraints on Parts of the Basis Matrix
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摘要: 该文提出一种部分基矩阵稀疏约束的非负矩阵分解(Non-negative Matrix Factorization with Sparseness Constraints on Parts of the Basis Matrix, NMFSCPBM)方法，其次将水印嵌入在NMFSCPBM分解后的基矩阵大系数中，利用NMFSCPBM提取视频运动特征自适应控制水印嵌入强度。最后，在水印检测时，只要残余视频中包含有视频最小剩余子块数，就可以恢复出完整基矩阵，进而提取出完整水印。实验表明，与同类方法相比，该方法抵抗强剪切攻击的能力获得了较大程度提升。Abstract: Firstly, the Non-negative Matrix Factorization with Sparseness Constraints on Parts of the Basis Matrix (NMFSCPBM) method is proposed in this paper. Secondly, the encrypted watermark is embedded into the big coefficients of the basis matrix by NMFSCPBM. At the same time, the watermark embedding strength is adaptively adjusted by the video motion characteristics extracted by NMFSCPBM. Finally, when detecting the watermark, as long as the residual video contains the numbers of least remaining sub-blocks, the complete basis matrix can be completely recovered, and then the complete watermark can be extracted. The experimental results show that the performance of resisting the strong cropping attacks of this paper is improved greatly compared with other similar methods.
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