激光技术2009，Vol.33Issue(4)：433-436,4.DOI:10.3969/j.issn.1001-3806.2009.04.029
基于菲涅耳域光学图像加密系统的解密研究
Study about decryption based on optical image encryption system in the Fresnel domain
肖永亮 1刘强 1袁胜 1周昕 1赵晓军 1杨泽后 2陈涌 2周鼎富2
作者信息
- 1. 四川大学,电子信息学院,成都,610064
- 2. 西南技术物理研究所,成都,610041
- 折叠
摘要
Abstract
A method was proposed to decrypt the original image from an only ciphertext encrypted from a symmetrical image.Through inverse Fresnel transform of the ciphertext holograph,the intensity of the frequency spectrum can be received by CCD and sent into a computer.According to the characteristics of autocorrelation and complex-convolution in discrete Fresnel transform,the coefficients are classified and ranked,so that the input light wave can be recovered and the original image can be obtained.The effect of the symmetrical deviation on the quality of the decrypted image was also studied.The investigation indicates that the original image can be decrypted by means of discrete Fresnel diffraction.关键词
信息光学/双随机加密/菲涅耳衍射/自相关/复卷积/对称图像Key words
information optics/dual-random encryption/Fresnel diffraction/autocorrelation/complex-convolution/symmetrical image分类
数理科学引用本文复制引用
肖永亮,刘强,袁胜,周昕,赵晓军,杨泽后,陈涌,周鼎富..基于菲涅耳域光学图像加密系统的解密研究[J].激光技术,2009,33(4):433-436,4.
