摘要
计算机模拟验证了系统用于光学图像加密和隐藏的可行性.理论分析揭示了本系统面向应用的三个性质:相位分布的台阶数可以作为系统设计的自由度;增加系统衍射级次可以提高秘密图像的解密质量,但此时系统受到波长微变的影响也较显著;轴向位移也会产生噪音信号,其衍射距离越长,解密质量越差.
The capability of encrypting and hiding the optical image was verified by the computer simulations. Some properties for application were found through theoretical analysis：additional freedom for system design is provided by the quantization of phase codes; increasing the number of diffractive-stage is able to improve the recovered quality, though the present system is more sensitive to the shifting of wavelength; the axial shifting of phase codes also brings noise signal, the longer propagation distance of which results in worse recovered quality.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2008年第9期1779-1783,共5页
Acta Photonica Sinica
基金
国家自然科学基金(60577039)资助
关键词
光学安全
图像加密
图像隐藏
相位恢复
Optical security
Image encryption
Image hiding
Phase retrieval
