一种基于小波变换的彩色图像数字水印算法研究

Research on Color Image Digital Watermarking Based on DWT

文章提出了一种在彩色图像的绿色分量中嵌入水印的方案,嵌入过程在小波变换域进行.原始二值水印图像按比例进行分解,结合HVS原理,将分解的水印图像嵌入到绿色分量的低频和中低频三级小波变换系数中.实验结果证明,该水印方案能有效地抵抗加性噪声、图像剪切等攻击,具有较强的鲁棒性。

The scheme of embedding a scrambled watermark into the green component of the color image was proposed. The embedding process was implemented in the discrete wavelet transform （DWT） domain. The original binary watermark image was firstly encrypted pro rata through Human visual system （HVS） principle and embedded into the DWT low frequency sub- band of green components. The experimental results demonstrated that the proposed watermarking scheme was very robust to the attacks such as additive noise, cropping image.