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首页> 外文期刊>International Journal of Image Processing >Robust Digital Image-Adaptive Watermarking Using BSS Based
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Robust Digital Image-Adaptive Watermarking Using BSS Based

机译：基于BSS的稳健数字图像自适应水印

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In a digital watermarking scheme, it is not convenient to carry the original image all the time in order to detect the owner's signature from the watermarked image. Moreover, for those applications that require different watermark for different copies, it is preferred to utilize some kind of watermark-independent algorithm for extraction process i.e. dewatermarking. Watermark embedding is performed in the blue channel, as it is less sensitive to human visual system .This paper proposes a new color image watermarking method ,which adopts Blind Source Separation (BSS) technique for watermark extraction. Single level Discrete Wavelet Transform(DWT) is used for embedding . The novelty of our scheme lies in determining the mixing matrix for BSS model during embedding. The determination of mixing matrix using Quasi-Newton’s (BFGS) technique is based on texture analysis which uses energy as metric. This makes our method image adaptive to embed the watermark into original image so as not to bring about a perceptible change in the marked image. BSS based on Joint diagonalization of the time delayed covariance matrices algorithm is used for the extraction of watermark. The proposed method, undergoing different experiments, has shown its robustness against many attacks including rotation ,low pass filtering, salt n pepper noise addition and compression. The robustness evaluation is also carried out with respect to the spatial domain embedding.
机译：在数字水印方案中，一直携带原始图像以从水印图像中检测所有者的签名是不方便的。而且，对于那些对于不同的副本需要不同的水印的应用，优选的是利用某种与水印无关的算法来进行提取过程，即去水印。水印嵌入是在蓝色通道中进行的，因为它对人的视觉系统不太敏感。本文提出了一种新的彩色图像水印方法，该方法采用盲源分离（BSS）技术提取水印。单级离散小波变换（DWT）用于嵌入。我们的方案的新颖之处在于在嵌入过程中确定BSS模型的混合矩阵。使用准牛顿（BFGS）技术确定混合矩阵的方法是基于以能量为度量标准的纹理分析。这使我们的方法图像具有自适应性，可以将水印嵌入到原始图像中，从而不会在标记的图像中带来明显的变化。基于时延协方差矩阵联合对角化的BSS算法用于水印的提取。所提出的方法经过了不同的实验，显示了其对许多攻击的鲁棒性，包括旋转，低通滤波，胡椒盐噪声添加和压缩。还针对空间域嵌入进行了鲁棒性评估。

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