基于小波变换算法的新型防攻击数字水印技术

随着Internet的迅猛发展，数字水印技术越来越受到人们的关注。在其发展的同时数字水印攻击手段也在不断的发展。因此，介绍一种在小波变换的基础上加以改进，从而提高数字水印的防攻击能力新型算法：它借助于随机平放算法，通过DWT变换嵌入水印，同时对图象质量无影响。此法能抵制多种攻击，如：图象旋转、裁剪、伪造等，在实践中表现出较好的健壮性。

A new digital watermark technology with high resistance to attack based on DWT

With the rapid development of internet technology.Digital watermark technology has more and more attention.At the same time watermark-attacking technology is also developing constantly.This paper describes,a new watermark technology with high resistance to watermark attack.Based on stochastic even placement of image blocks and locating technology of features,this method applies DWT transform to watermark embedding.Without negative effecton the quality of image information,this method can resist kinds of attacks,which include cutting,rotating,confusion,forging.And this method is robust in practices.