一种黑白数字签名的水印技术研究

本文提出了基于小波变换实现黑白数字签名水印的一种方法。黑白的签名水印的应用范围很广泛,在对数字图像的认证中,简单的黑白二值水印就可以高效的达到鉴定的作用。在对黑白二值水印进行水印嵌入时,利用小波变换对原始宿主图像进行处理,对黑白签名水印进行二进制处理,同时对逼近子图做高斯滤波,与原逼近子图对比来确定水印嵌入位置。实验结果表明水印是不可见的,对JPEG有损压缩、中值滤波、噪声干扰等有较强的鲁棒性。

A Study of black-and-white Digital Watermark Technique Based on Wavelet

This paper proposes a method about digital watermark algorithmto embed black-and-white digital watermark.It is very popular to embed watermarking just using black-and-white picture.It is efficiently if we are use blace-and-white picture as a watermark.In the process of embedding watermarking,dispose the original picture by making use of wavelet, then dispose the black-and-white to binary system.At the same time,the picture contrast the original detailed sub-picture in order to confirm the embedded place.The experimental results show that the watermark is perceptually invisible and proposed scheme is robust to some image processing such as loss JPEG defective compression,median filtering,noise.