基于RH算子和整数小波变换的医学图像脆弱水印算法  

A Fragile Watermarking Algorithm for Medical Image Based on RH Operator and Integral Wavelet Transform

作　　者：陈敏歌[1] 王蕊[1] 焦占亚[1] 李建文[1] 

机构地区：[1]陕西科技大学,陕西西安710021

出　　处：《微电子学与计算机》2009年第11期124-126,130,共4页Microelectronics & Computer

基　　金：国家自然科学基金项目(60672001);陕西省教育厅专项基金(05JC03)

摘　　要：提出了一种医学图像脆弱水印算法.该算法对原始医学图像感兴趣区域进行整数小波压缩,提取其低频子带LL,生成水印标志;对原始医学图像和水印图像分块处理,且对其做行列RH再进行量化处理变换,实现水印的嵌入.实验结果表明,该算法对于嵌入水印后的图像具有良好的透明性,可检测出1bit篡改,对图像篡改具有很高的敏感性和定位能力.This paper presented a fragile watermarking scheme for medical image. The proposed method uses integral wavelet to decompose ROI and extract lowfrequency LL in order to generate watermarking image; the original image and watermarking image are blocked and RH and quantized, the watermarking image is embedded in high frequency of the original image. The experimental results show that the watermarking algorithm performs well in image embedded by watermarking and can check 1 bit distortion; it is more sensibility and locates function for falsification of image.

关 键 词：整数小波变换 RH算子 脆弱水印 定位 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]