LSB扩展的图像自嵌入方法

本文描述了一种基于LSB扩展的图像自嵌入方法.该方法在使用LSB数据隐藏的同时,对图像的高层位平面采用无损数据嵌入方法,将图像的压缩信息与认证信息嵌入到图像自身中.当原图像有缺损或被篡改时,使用认证信息可较准确地定位受损位置;使用从偏移图像子块中提取的数据,可近似地恢复原图像的受损部分;同时图像的高层位平面还可无损恢复.该方法增加了数据嵌入的容量,提高了恢复图像的质量.

Image self-embedding method based on LSB extension

This paper presents a method of image self-embedding, which is based on the extension of LSB data hiding method, When LSB embedding method was used in data hiding, reversible hiding method was applied in higher bitplanes as an addition of LSB embedding capacity. In this method of image self-embedding, the compressed image information and the authentication information were embedded into the image itself, When tamper occurs in the stego-image, the positions of tampered blocks could be detected with the information of authentication extracted from the stego-image. Image can be restored approximately using the data extracted from the offset block. At the same time, high bitplanes can be recovered Iosslessly. The self-embedding method based on LSB extension increases capacity of data hiding and improves the quality of recovered image.