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首页> 外文会议>International Conference on Computer Application and System Modeling >Semi-fragile watermarking algorithm based on bi-watermarking technology
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Semi-fragile watermarking algorithm based on bi-watermarking technology

机译：基于双水印技术的半易碎水印算法

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摘要

A semi-fragile watermarking algorithm using bi-watermark is proposed in this paper. When embedding watermark, the original image was decomposed by 3-level discrete wavelet first, and then edge information of the third approximation coefficient was extracted using canny operator. It was embedded into the third vertical detail coefficient by QR decomposition and replacement getting fragile watermark. Principal component of the third approximation coefficient was got by PCA and embedded into the third horizontal detail coefficient as robust watermark. In the end, the approximation coefficient, changed detail coefficients were constructed to obtain image having watermarking. When authenticating image, the observed image was decomposed by 3-level discrete wavelet first. Image could be authenticated correctly and attacked parts could be localized through comparing the original watermarks and extracted watermarks. Experimental results show the efficiency and feasibility of this method.
机译：本文提出了一种使用双水印的半易碎水印算法。当嵌入水印时，原始图像通过3级离散小波分解，然后使用罐式操作员提取第三近似系数的边缘信息。它通过QR分解和更换脆弱的水印，嵌入到第三垂直细节系数。第三近似系数的主要成分由PCA获得，并嵌入到第三水平细节系数中，以鲁棒水印。最后，构造近似系数改变细节系数以获得具有水印的图像。在验证图像时，观察到的图像首先由3级离散小波分解。图像可以正确认证，并且可以通过比较原始水印和提取的水印来定向攻击部件。实验结果表明了这种方法的效率和可行性。

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