Abstract: A new robust digital image watermarking technique is proposed.Generating watermark process uses conversion，scrambling and extension to original watermark.Embedding process embeds watermark in approximation image of original image in wavelet domain，and the embedded intensity of watermark is determined adaptively by noise visibility function.Extraction process adopts independent component analysis and doesn’t need any information about original image and original watermark.The experimental results show that this method has a good robustness to the popular watermark benchmarking software Checkmark.

摘要： 提出了一种鲁棒数字图像水印算法。水印生成过程对原始水印进行转换、置乱和扩展等处理；水印嵌入过程将水印嵌入在原始图像小波域的逼近子图，嵌入的强度由噪声可见性函数自适应决定。水印提取过程不需要任何原始图像和原始水印的信息，采用独立分量分析实现对水印信号的盲提取。实验结果证实对于水印基准测试软件Checkmark的各种攻击，该算法具有较强的鲁棒性。