摘要
为实现全息图的加密,选择计算全息图和秘钥图像分别作为明文和秘钥,将明文与秘钥图二进制图像做平面位分解,并对每一平面位做密钥图像与明文全息图的“异或”加密运算,获得加密平面位图像,再将各加密平面位图像合成加密图像,实现全息图的图像加密。全息图像采用菲涅耳积分的S-FFT算法实现,解密时由加密图像和密钥图像平面位做“异或”运算可得到全息图明文,将全息图明文采用菲涅耳积分的S-FFT逆运算得到提取的明文图像信息。该方法较大幅度地提高了图像加密的效果,具有难破解、安全性高等显著特点与优势。
In order to encrypt the hologram, the computational hologram and the secret key image are chosen as the plaintext and the secret key image respectively. By decomposing the binary image of the plaintext and the secret key image into plane bits and encrypting for the key image and the plaintext hologram by XOR, the encrypted plane bits can be obtained. Then the encrypted plane bits are synthesized into encrypted images, to have realized the image encryption of holograms. The hologram is realized by Fresnel integral algorithm. When decrypting, the plaintext of the hologram can be obtained by exclusive or operation between the encrypted image and the plane bits of the key image. The extracted plaintext image information can be gotten by inverse operation of Fresnel integral for the plaintext of the hologram. This method greatly improves the effect of image encryption, and has the remarkable characteristics and advantages of difficult to crack and high security.
作者
王安玲
刘福平
WANG Anling;LIU Fuping(Science Education Department,Beijing Institute of Graphoc Communication,Beijing 102600,China)
出处
《北京印刷学院学报》
2019年第5期111-114,共4页
Journal of Beijing Institute of Graphic Communication
基金
北京印刷学院教委专项科研项目基础研究重点项目(Ea201806)
北京印刷学院教委专项科研项目研发计划项目(Ec201803)
关键词
全息图像
菲涅耳衍射
"异或"加密算法
Holographic image
Fresnel diffraction
XOR encryption algorithm
