Two-step phase-shifting interferometry and its application in image encryption

被引：325
作者：
Meng, X. F. [1 ]
Cai, L. Z. [1 ]
Xu, X. F. [1 ]
Yang, X. L. [1 ]
Shen, X. X. [1 ]
Dong, G. Y. [1 ]
Wang, Y. R. [1 ]
机构：
[1] Shandong Univ, Dept Opt, Jinan 250100, Peoples R China
来源：
OPTICS LETTERS | 2006年 / 31卷 / 10期
关键词：
D O I：
10.1364/OL.31.001414
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Conventional phase-shifting interferometry (PSI) needs at least three interferograms. A novel algorithm of two-step PSI, with an arbitrary known phase step, by which a complex object field can be reconstructed with only two interferograms is proposed. This algorithm is then applied to an information security system based on double random-phase encoding in the Fresnel domain. The feasibility of this method and its robustness against occlusion and additional noise attacks are verified by computer simulations. This approach can considerably improve the efficiency of data transmission and is very suitable for Internet use. (c) 2006 Optical Society of America
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页码：1414 / 1416
页数：3
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