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一种基于小波变换的灰度图像水印算法
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2009-07-15
杜喜喜
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本文提出了一种基于小波变换的采用灰度图像作为水印的盲水印算法，水印经过图像置乱后，把水印分解成8 个二值位平面，选择高4 位二值位平面嵌入到原始图像的中频子带。实验结论和攻击测试表明，本文所提议的算法对JPEG 有损压缩和加性噪声等图像攻击有较强的鲁棒性。
关键词：数字水印；鲁棒性；小波变换；灰度图像；图像置乱
Abstract ：A blind watermarking method based on wavelet transform is proposed in the paper, which selects a gray-level image as the watermarking.After be scrambled,the watermarking can be decomposed into eight binary images.The higher four binary images are embedded into the middle frequency coefficients of the original image.Experimental results and the testings of attacking prove that the method is robust enough to some image attacking processes such as JPEG compressing and adding noise.
Key words： digital watermarking；robustness；wavelet transform；gray-level image；image scrambling
关键词：数字水印；鲁棒性；小波变换；灰度图像；图像置乱
Abstract ：A blind watermarking method based on wavelet transform is proposed in the paper, which selects a gray-level image as the watermarking.After be scrambled,the watermarking can be decomposed into eight binary images.The higher four binary images are embedded into the middle frequency coefficients of the original image.Experimental results and the testings of attacking prove that the method is robust enough to some image attacking processes such as JPEG compressing and adding noise.
Key words： digital watermarking；robustness；wavelet transform；gray-level image；image scrambling
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