基于独立分量分析和菲涅耳全息图的盲水印算法

Blind digital watermarking algorithm based on Fresnel hologram and ICA

提出了一种基于DWT-DCT域的数字全息盲水印算法.该算法首先将原始水印图像经过离散菲涅耳变换转化为数字全息图.接着对宿主图像DWT域的低频子带进行DCT变换,并嵌入全息水印图像.ICA用于水印信号的提取,实验结果表明该算法可以抵抗滤波、JPEG压缩、尺度缩放等攻击.由于该水印算法不仅实现水印的盲提取,而且具有多重密钥,所有具有的实用性和安全性.

A new blind digital image watermarking algorithm based on DWT- DCT and Fresnel hologram is proposed. In the algorithm,a digital hologram is obtained by the means of discrete Fresnel diffraction and embedded in DCT（ discrete cosine transform） domain of low band of DWT（ discrete wavelet transform） domain. It realizes blind extraction by independent component analysis. Experimental result indicates the presented watermarking scheme is robust against filtering,JPEG compression and resizing scale attacks,etc. It is a blind detection watermark since the watermark can be retrieved without the original host image,moreover with multiple keys; the algorithm has high security and practical value.