期刊
OPTICS AND LASERS IN ENGINEERING
卷 47, 期 1, 页码 45-50出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2008.08.001
关键词
Image encryption; Decryption; Gyrator transform; Digital holography
类别
A novel optical image encryption method is Proposed, based Oil gyrator transform and phase-shifting interferometry. Thle input two-dimensional image to be encrypted is gyrator transformed two times, and two random phase masks are placed at the input plane and the Output plane of the first gyrator transform. Two-step phase-shifting interferometry is used to record the digital holograms of the input image encrypted by use of double-random phase encoding technique in gyrator transform domain. The rotation angles of gyrator transform, the random phase mask in the gyrator plane and the arbitrary phase shift used for recording form the keys for decryption of the input image. Numerical simulations are presented to verify its validity and efficiency. (C) 2008 Elsevier Ltd. All rights reserved.
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