一种基于HVS的变换域数字水印算法

A Digital Watermark Algorithm Based on HVS and Spatial-Domain Techniques

以离散余弦变换(DCT)、离散小波变换(DWT)、静态图像压缩编码为基础,依据人眼视觉特性(HVS),提出了一种将二维数字水印信息(灰度图像)经过压缩编码变换后,嵌入到经DWT和DCT变换的原始载体图像的数字水印算法.实验结果表明,此算法对叠加噪声、JPEG压缩、平滑滤波、几何剪切、旋转变换等攻击均具有较好的鲁棒性.

Based on the Discrete Cosine Transform （DCT）, Discrete Wavelet Transform （DWT）, still image compression coding technique, and Human Visual System （HVS） , the 2 -dimensional digital watermark （gray image） ,which has been compression- coding transformed, is embedded into the host image after DWT and DCT. Experimental results show that the proposed watermarking scheme is robust against various signal processing such as noise adding, JPEG compression, smooth filtering,cropping, and rotating transform.