基于全息技术的光学图像信息隐藏研究

Image information hiding algorithm based on optical information processing technology

传统方法存在图像信息识别度较低,不能将图像中的信息进行完全的隐藏,导致图像信息隐藏的安全性较低,保密程度较差的问题。提出一种新型的光学图像信息隐藏算法。基于光学扫描的全息系统图像压缩的加密算法是光学信息处理的基础,加密后的傅里叶变换能表示图像构成物体的傅里叶采样,通过压缩的传感技术完成对加密后信息进行压缩。在光学扫描的全息系统中,利用小波的稀疏基与傅里叶的采样完成图像压缩的全息,信息的隐藏者采用待嵌入的信息构成伪像素,图像信息加密后对图像目标的像素进行替换完成信息的嵌入,以及密钥对图像伪像素值的范围进行计算,从隐藏的信息中对加密后的图像伪像素进行提取,经过比对,得出图像伪像素的值,在对图像信息进行解密后,依据密钥对图像的伪像素进行提取,最终提取出图像嵌入的信息,保证了图像的质量,完成对光学信息的处理技术图像信息的隐藏。实验结果表明,本文算法提高图像信息隐藏的安全性以及信息保密的程度,且图像质量较好。

A hidden algorithm for image information processing based on optical information is proposed. The holographic system based on optical scanning image compression encryption algorithm is the basis of optical information processing. The encrypted Fourier transform can describe the structure of the object＇s Fourier sampling,through the compressed sensing technique to compress the encrypted information. In the holographic optical scanning system,the sampling of sparse matrix of wavelet and Fourier completes holographic image compression. Information hiding is used for embedding information to constitute a dummy pixel. The complete information of the image target pixels is embedded after image information encryption. And the dummy pixel value range is calculated by the key. Extract the encrypted dummy pixel from the hidden information. And get the value through the comparison. After decoding the image information,extract the image dummy pixel based on the key. Eventually extract the embedded image information which ensure the quality of the image information,complete the hiding of image information. The experimental results show that the proposed algorithm improves the security of image information hiding and the degree of information secrecy,and the image quality is better.