基于F5与湿纸码相结合的密写算法研究  

Steganography Algorithm on F5 and Wet Paper Code

作　　者：唐红梅[1] 庞翀[1] 王霞[1] 高金雍[1] 韩力英[1] 

机构地区：[1]河北工业大学信息工程学院,天津300401

出　　处：《电视技术》2013年第17期22-24,28,共4页Video Engineering

基　　金：河北省教育厅高等学校科学技术研究指导项目(Z2010232)

摘　　要：基于F5密写与湿纸码提出了一种具有较高不可觉察性的信息隐藏算法。首先用方差将图像划分为不同的区域,利用湿纸码在低、中频的量化后小数部分为[0.4,0.6]的DCT系数构造选择信道,并且要求它们不处于色块区域。其次在进行嵌入信息时增加DCT系数的绝对值。该算法避免了对人眼视觉敏感区域的修改以及F5密写的"收缩"现象,与F5密写相比改进了系数选择方法与嵌入策略。实验表明,该算法具有较高的安全性,含密图像具有较好的图像质量。An information hiding algorithm which have better imperceptibility based on F5 steganography and wet paper code is proposed in this paper. First of all, the proposed method divides the image into different regions by variance, and the selection channel is constructed by wet paper code in the DCT coefficients of low and middle frequency its decimal part is 0. 4 - 0.6, and make sure that they don＇ t belong to the region of color lump. Secondly, the method increases the absolute value of the DCT coefficients when embedding information. So the modification is prevented to the sensitive area of eyes and the ＂shrinkage＂ of 1：5 steganography, the method of selecting coefficients and the information embedding rule is improved compared to F5 steganography. The experimental results indicate that this algorithm has upper security and the stego-images obtain better quality.

关 键 词：数字密写 F5密写 湿纸编码 选择信道 

分 类 号：TN918.4[电子电信—通信与信息系统] TP301.6[电子电信—信息与通信工程]