一种基于JPEG图像的密写算法

Steganography algorithm based on JPEG image

目前,在基于JPEG图像的数字密写中,在保证隐蔽性和信息隐藏量的前提下,鲁棒性往往不能保证,导致提取秘密信息的正确率不够高。针对此,提出将汉明码应用于密写嵌入过程中,利用JPEG图像压缩原理,将处理后的隐蔽信息通过改变DCT系数来表示。通过实验分析与F4密写算法的比较,结果显示该方法具有较好的隐蔽性且具有较好的鲁棒性。

At present, in digital steganography algorithm based on JPEG, on the premise of ensuring the imperceptibility and the amount of information hiding,the robustness is often can not guaranteed. Based on this,we introduced a new steganography algorithm based on JPEG,this paper presentd the application of Hamming code used in steganography embedding process to improve the robustness. During the process of JPEG,by using the compression principle,the processed hidden information was displayed through changing the coefficient of DCT. Through experimental analysis and comparison with F4 steganography algorithms, the result shows that the proposed algorithm has better imperceptibility and robustness.