基于线性预测和位操作的信息隐藏算法

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。

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

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 algorithm has been proved that people can use it to embed a large payload while keeping the distortion low.