Fourier频率域随机谱隐秘信息加载与增量补偿系统

The system of loading hidden information in random spectrum of Fourier domain and incremental compensation

提出一种基于光学原理的Fourier频率域随机谱隐秘信息加载与增量补偿系统,并给出一种隐秘信息的加载方式,可实现光学图像信息隐藏.宿主图像经过随机相位调制后进行Fourier变换得到频率域的随机谱,在此随机谱上加载隐秘信息,同时,系统对由隐秘信息的加入所产生的影响进行补偿.利用该系统所得到的载体图像未经正确的密钥-随机相位-调制时,隐秘信息将弥散在载体图像的Fourier频率域空间,具有较好的不可检测性.此外,即使攻击者知道隐秘信息的存在甚至知道隐藏方法,但在不知道密钥的情况下,依然无法破解隐秘信息的内容,并且很难在不严重破坏图像质量的情况下消除隐秘信息.而在隐秘信息的提取过程中,不需要原始图像以及与原始图像或隐秘信息相关的附加信息的参与.模拟实验验证了该系统的可行性,也给出了对Gauss型噪声和椒盐噪声的鲁棒性。

The system of loading hidden information in random spectrum of Fourier domain and incremental compensation,which is based on optical principle and can be used in optical image information hiding,is proposed in this paper.A typical method of loading hidden information to the system is also presented.The random spectrum of host image multiplied by random phase mask is obtained by Fourier transform,and the hidden information is embedded in the random spectrum.At the same time,the effects induced by the hidden information can be compensated for by the proposed system.When the carrier image embedded with hidden information is decrypted with incorrect key-random phase mask,the hidden information will spread in the Fourier frequency domain,thus it is impossible to retrieve the hidden information.In addition,even though the attackers know the presence of hidden information and even the hiding method,they still can not decrypt the hidden content without the key,and it is also difficult to removal the hidden information without destroying the carrier image.While in the decryption process,neither the original image nor the information related to the hidden code is necessary.The feasibility of proposed system is demonstrated by simulation experiment and the robustness to the Gauss noise as well as salt and pepper noise is also presented at the end of this paper.