%0 Journal Article
%T Cascaded Fresnel Diffractive System for Optical Image Security<br>级联菲涅尔衍射光学图像安全系统
%A SHI Yi-shi
%A SITU Guo-hai
%A ZHANG Jing-juan
%A <br>史祎诗
%A 司徒国海
%A 张静娟
%J 光子学报
%D 2008
%I 
%X 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.
%K Optical security
%K Image encryption
%K Image hiding
%K Phase retrieval<br>光学安全
%K 图像加密
%K 图像隐藏
%K 相位恢复
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=61F5BCC374C29265B1F03900DA9B7391&yid=67289AFF6305E306&vid=42425781F0B1C26E&iid=9CF7A0430CBB2DFD&sid=1B1F9B96EF7F53E5&eid=5B3A9A8E2DA941E3&journal_id=1004-4213&journal_name=光子学报&referenced_num=0&reference_num=9