基于线性预测和位操作的信息隐藏算法  

Data Hiding Algorithm Based on Linear-Prediction and Bit-Operation

作　　者：朴红吉[1] 郑品[1] 田雄[1] 冯林[1] 

机构地区：[1]大连理工大学大学生创新院,辽宁大连116023

出　　处：《计算机技术与发展》2008年第1期185-187,191,共4页Computer Technology and Development

基　　金：国家自然科学基金资助项目(50575031)

摘　　要：鉴于信息的安全性问题,信息隐藏技术也已成为信息安全领域的研究热点。利用图像中当前像素点邻近的相关像素的像素值,对该点的值进行线性预测。再根据预测的准确度,确定相应的阈值,并结合位操作,提出了一种新的简单易于实现的信息隐藏算法。并在Lena图像上进行了实验,得到了隐藏率为0.160bits/Byte,信噪比为42.276dB的结果。经初步测试,证明了在保证较高隐藏率的前提下,能够较好地提高信噪比。People are facing more and more problems on information security, and information hiding has been a research hotspot in this field. First, linear- predict the value of a pixel in an image based on the values of the surrounding pixels. According to the veracity of the linear - prediction, and based on bit - operation, propose a new watermarking algorithm for digital images, which is easy to realize. A test on Lena image has been done, the hiding rate is 0.160bits/Byte, and the SNR （Signal - to- Noise） is 42. 276dB. The new algorikhm has been proved that people can use it to embed a large payload while keeping the distortion low.

关 键 词：信息隐藏 线性预测 位操作 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]