摘要
提出了一种基于小波变换的数字水印算法.采用Arnold变换和伪随机序列变换双密钥相结合,更加稳固了水印序列.变换后的水印序列有选择地嵌入到载体图像的3级小波系数中,嵌入算法采用抖动量化,水印提取为盲提取.实验结果表明该算法具有较好的不可见性,对剪切、噪声污染、滤波、JPEG压缩攻击具有良好的鲁棒性.
A digital watermarking algorithm is proposed based on the wavelet transform, which furthmore stablizes the watermarking sequence by combining Arnold transform with pseudo-random sequence transform. The transformed watermarking sequence is embedded in three-level of wavelet coefficients of carrier image selectively. The embedded algorithm adopts dither quantification. The watermark extraction is blind, The experimental results show that this algorithm possesses better invisibility and has good robustness to Clipping, noise, filtering and JPEG compression attack.
出处
《应用科技》
CAS
2007年第1期24-27,共4页
Applied Science and Technology
关键词
小波变换
数字水印
鲁棒性
伪随机序列
wavelet transform
digital watermark
robustness
pseudo-random sequence
