基于叠代傅立叶转换的半色调图像嵌入水印算法

A Novel Method with Halftone Image to Embed Digital Watermark Based on IFTA

为了提高嵌入水印的数字图像对传输中所遭受的压缩攻击和几何攻击的鲁棒性,本文提出了基于叠代傅立叶转换的半色调图像嵌入水印算法.该算法通过对子图像的合理切割,结合对称式水印嵌入技术的运用,将经由叠代傅立叶转换以及蓝杂讯遮罩所产生的半色调图像进行处理,使水印在传输中具有很好的强韧度,同时图像又能够在人眼视觉下接近模拟的连续.通过实验检验,该算法很好地达到了预计的设想.

In this paper, we present a novel method based on halftone image to embed digital watermark to protect the IPR. We use iterative fourier transform algorithm or based on radial average power spectrum to adjust the halftone image,and embed watermark into middle magnitude. In the frameworks, the attacks can be regarded as geometric attacks Rotate, Translate, Scaling, Crop） and compression.