Journal ArticleDOI
Encrypting three-dimensional information with digital holography
Enrique Tajahuerce,Bahram Javidi +1 more
TLDR
A method for optical encryption of three-dimensional (3D) information by use of digital holography using a phase-shifting interferometer and an intensity-recording device.Abstract:
A method for optical encryption of three-dimensional (3D) information by use of digital holography is presented. A phase-shifting interferometer records the phase and amplitude information generated by a 3D object at a plane located in the Fresnel diffraction region with an intensity-recording device. Encryption is performed optically by use of the Fresnel diffraction pattern of a random phase code. Images of the 3D object with different perspectives and focused at different planes can be generated digital or optically after decryption with the proper key. Experimental results are presented.read more
Citations
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Journal ArticleDOI
Asymmetric information hiding and noise-free recovery based on rotating analyzer ellipsometry and quick-response code.
Chao Lin,Xueju Shen,Zhisong Wang +2 more
TL;DR: In this article, an asymmetric optical information hiding method based on a rotating analyzer ellipsometry technique was proposed, which not only avoids the interception of keys during transmission or distribution but also makes the cyphertext more inconspicuous for attackers.
Book ChapterDOI
Optical Image Encryption Using Optimized Keys
Takanori Nomura,Bahram Javidi +1 more
TL;DR: A secure optical data-storage system with a random phase key code based on a configuration of a joint transform correlator and the method to design the key code has been proposed.
Proceedings ArticleDOI
A numerical analysis of double random phase encryption
TL;DR: This paper maps the assiocated error for every phase-key in the key-space of a particular system to get a visual representation of the spread of phase-keys for the system and assess its security from a key- space perspective.
Journal ArticleDOI
A Content Hiding Method for Digital Hologram Using Multiple Fresnel Diffraction
TL;DR: This work proposes an encryption scheme for digital holograms, whose goal is to hide their information with maximal visual distortion and minimal ration of the encrypted data, which uses the characteristics of the Fresnel transform and signal processing techniques.
Journal ArticleDOI
Signal and reference wave dually encrypted digital holographic system
TL;DR: A secure digital holographic system with signal and reference waves dually encrypted with high quality and good fault tolerance and theoretically and experimentally demonstrate encryption and decryption of multiple images.
References
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Journal ArticleDOI
An algorithm for the machine calculation of complex Fourier series
J.W. Cooley,John W. Tukey +1 more
TL;DR: Good generalized these methods and gave elegant algorithms for which one class of applications is the calculation of Fourier series, applicable to certain problems in which one must multiply an N-vector by an N X N matrix which can be factored into m sparse matrices.
Journal ArticleDOI
Optical image encryption based on input plane and Fourier plane random encoding.
Philippe Réfrégier,Bahram Javidi +1 more
TL;DR: A new optical encoding method of images for security applications is proposed and it is shown that the encoding converts the input signal to stationary white noise and that the reconstruction method is robust.
Journal ArticleDOI
Phase-shifting digital holography
Ichirou Yamaguchi,Tong Zhang +1 more
TL;DR: A new method is proposed in which the distribution of complex amplitude at a plane is measured by phase-shifting interferometry and then Fresnel transformed by a digital computer, which can reconstruct an arbitrary cross section of a three-dimensional object with higher image quality and a wider viewing angle than from conventional digital holography using an off-axis configuration.
Journal ArticleDOI
Direct recording of holograms by a CCD target and numerical reconstruction.
Ulf Schnars,W. Jüptner +1 more
TL;DR: The principle of recording holograms directly on a CCD target is described and a real image of the object is reconstructed from the digitally sampled hologram by means of numerical methods.
Journal Article
Digital wavefront measuring interferometer for testing optical surfaces and lenses
TL;DR: In this article, a self-scanned 1024 element photodiode array and a minicomputer are used to measure the phase (wavefront) in the interference pattern of an interferometer to lambda/100.
Related Papers (5)
Optical image encryption based on input plane and Fourier plane random encoding.
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