一种基于小波分析的自适应图像水印算法

提出一种在小波变换域自适应嵌入数字水印的算法。由人眼视觉系统特性,在第三级小波系数子图中 嵌入水印信号。水印强度与图像的显著性成正比,使水印对原图像具有自适应性。对水印图像进行各种退化处理的 实验表明,提出的数字水印算法具有很好的鲁棒性。

An Adaptive Watermark Algorithm Based on Wavelet Transform

An algorithm of embedding digital watermark into wavelet transform domain was proposed. Utilizing the human visual models, watermark was embedded into the coefficient of third level subimage. The intensity of watermark was proportional to the intensity of saliency of the image, which made the watermark be adapted to the original image. The experiment results show that the digital watermark algorithm is robust enough to image degradation processes.