基于湿纸编码的多像素值差密写

Multi-pixel value differencing steganography based on wet paper codes

提出了一种基于湿纸编码的多像素值差(MPVD,multi-pixel value differencing)密写方法。首先用光栅扫描的方式将载体图像划分为若干不重叠的四像素的小块,再将每个小块的4个像素值分别与其中最小像素值求差,应用湿纸密写原理,通过选择适合人眼分辨能力的"干燥区域",将改进的Arnold方法置乱的秘密信息嵌入。模拟实验结果表明,和最低有效位法(LSB)和像素值差法(PVD)相比,本文方法嵌入量高,安全性好,提取简单。

A new data hiding method-multi-pixel value differencing（MPVD） steganography based on wet paper codes is presented.Firstly the cover image is divided into many unlapped blocks by using the way of raster scanning,each of which includes four pixels.Secondly the differences between each pixel and the minimal pixel in the block are gotten;the principle of wet paper writing is used in the differences,the dry place of which is selected to embed the scrambled secret message by the improved Arnold method,which is suitable to the human visual resolution capacity.With this algorithm,both the high capacity of embedding and security are ensured and the extraction is easy.The experiment results prove the validity of the proposed algorithm.