基于JPEG图像的密写改进方案

摘要

为了提高秘密信息的嵌入量,文中基于F4密写提出了一种增大嵌入量的密写改进方法.该方法通过让部分DCT系数中0系数携带秘密信息,从而提高秘密信息的嵌入量.实验表明,该方案在保持图像DCT系数直方图基础上,不但能抵抗直方图和分块特性密写分析,安全性也比较高,而且信息嵌入率也提高了8％左右.%In order to increase the embedding capacity of secret messages,a secure steganographic technique which based on the F4 steganography method is propose.The method allows partial DCT coefficients of the 0 coefficients to embed secret information,so as to increase the hiding capacity.This way,the histogram-based an d blockiness-based steganalyses are effectively resisted.Simulation results show that the proposed method is high secure for cover images,andand information embedding rate has increased by about 8％.