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
Three-dimensional joint transform correlator cryptosystem
TL;DR: This work introduces for the first time, to the best of its knowledge, a three-dimensional experimental joint transform correlator (JTC) cryptosystem allowing the encryption of information for any 3D object, and as an additional novel feature, a second3D object plays the role of the encoding key.
Book ChapterDOI
Hybrid Optical Encryption of a 3D Object by Use of a Digital Holographic Technique
TL;DR: Experimental results including encryption, decryption, and parallax images confirm the proposed hybrid optical encryption of a 3D object by using a combination of a real optical system and a virtual optical system.
Journal ArticleDOI
Secure three-dimensional data transmission and display.
Osamu Matoba,Bahram Javidi +1 more
TL;DR: This work investigates the influence of quantization of the joint power spectrum in the optical correlator on the quality of the reconstructed image and proposes an optical three-dimensional display system interfaced with digital data transmission.
Journal ArticleDOI
Efficient asymmetric image authentication schemes based on photon counting-double random phase encoding and RSA algorithms
TL;DR: The retrieved image from the proposed authentication method contains photon-limited encrypted data obtained by means of PC-DRPE, which can be protected while the retrieved image can be efficiently verified using a statistical nonlinear correlation approach.
Journal ArticleDOI
Optical image hiding in the Fresnel domain
TL;DR: Due to the particularly employed optical keys, including the wavelength key and the mask position key, in this Fresnel hiding system, the system's security is further improved and the flexibility of the designs for different application purposes is introduced.
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.
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Optical image encryption based on input plane and Fourier plane random encoding.
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