Journal ArticleDOI
Optical encryption using a joint transform correlator architecture
Takanori Nomura,Bahram Javidi +1 more
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An optical double random-phase encryption method using a joint transform correlator architecture is proposed, in which the joint power spectrum of the image to be encrypted and the key codes is recorded as the encrypted data.Abstract:
An optical double random-phase encryption method using a joint transform correlator architecture is proposed. In this method, the joint power spectrum of the image to be encrypted and the key codes is recorded as the encrypted data. Unlike the case with classical double random-phase encryption, the same key code is used to both encrypt and decrypt the data, and the conjugate key is not required. Computer simulations and optical experimental results using a photorefractive- crystal-based processor are presented. © 2000 Society of Photo-Optical Instru- mentation Engineers. (S0091-3286(00)03508-X)read more
Citations
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Journal ArticleDOI
Optical image compression and encryption methods
Ayman Alfalou,Christian Brosseau +1 more
TL;DR: Optical processing methodologies, based on filtering, are described that are applicable to transmission and/or data storage and the advantages and limitations of a set of optical compression and encryption methods are discussed.
Journal ArticleDOI
Advances in optical security systems
TL;DR: This paper presents a review of optical technologies for information security, and theoretical principles and implementation examples are presented to illustrate each optical security system.
Journal ArticleDOI
A review of optical image encryption techniques
TL;DR: This overview allows the numerical simulations of the corresponding optical encryption systems, and the extra degree of freedom (keys) provided by different techniques that enhance the optical encryption security, to be generally appreciated and briefly compared and contrasted.
Journal ArticleDOI
Advanced optical correlation and digital methods for pattern matching—50th anniversary of Vander Lugt matched filter
TL;DR: The paper reviews some domains that appeared as emerging fields in the last years of the 20th century and have been developed later on in the 21st century, such as three-dimensional object recognition, biometric pattern matching, optical security and hybrid optical–digital processors.
Journal ArticleDOI
Optical encryption and QR codes: Secure and noise-free information retrieval
TL;DR: This work introduces for the first time the concept of an information "container" before a standard optical encrypting procedure which is a QR code which offers the main advantage of being tolerant to pollutant speckle noise.
References
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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
Signal detection by complex spatial filtering
TL;DR: The experimental results obtained to date indicate that this technique provides an excellent two-dimensional filtering capability that will play a key role in such problems as shape recognition and signal detection.
Journal ArticleDOI
A Technique for Optically Convolving Two Functions
C. S. Weaver,Joseph W. Goodman +1 more
Journal ArticleDOI
Optical pattern recognition for validation and security verification
Bahram Javidi,Joseph L. Horner +1 more
TL;DR: Computer simulation results and tests of the proposed system are provided to verify that both the phase mask and the primary pattern are separately readable and identifiable in an optical processor or correlator.
Journal ArticleDOI
Optical encryption system that uses phase conjugation in a photorefractive crystal.
TL;DR: In this work, an optical encryption system based on double-random phase encoding of the data at the input and the Fourier planes is implemented, and the key that is used during encryption can be used for decrypting the data, thereby alleviating the need for using a conjugate of the key.
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Optical image encryption based on input plane and Fourier plane random encoding.
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