【摘要】 为了防止数字作品在网络传输中被盗用，提出一种基于DWT-HD-SVD的图像水印算法.在嵌入过程中通过多级小波变换将宿主图像分解成多个子带，然后将得到的子带系数用作HD分解的输入，同时对水印图像进行奇异值分解运算，最后通过恰当的嵌入强度将水印嵌入到宿主图像中.通过相应的提取算法，将水印提取出来并加以分析验证.实验结果表明：所提出的图像水印算法在隐蔽性和鲁棒性之间取得了很好的平衡，且鲁棒性较相关的算法有所提升，对于嵌入多种尺寸的水印也得到了较好的仿真性能.更多还原

【Abstract】 To prevent digital works from being pirated and abused in network transmission, an image watermarking algorithm based on DWT-HD-SVD is proposed. The host image is decomposed into multiple sub-bands by multi-stage wavelet transform during the embedding process, and the sub-band coefficients are used as the input of hessenberg decomposition. Meanwhile, singular value decomposition is performed on the watermark image, and the watermark is embedded into the host image by appropriate embedding intensity factor. Through the corresponding extraction algorithm, the watermark is extracted and analyzed. Experiment results show that the proposed image watermarking algorithm achieves a good balance between concealment and robustness, and good simulation performance is also obtained for embedding multiple sizes of watermark.更多还原