scholarly journals Effects of using an encrypted image corrupted by noise and occlusion in a security system based on joint transform correlator and Gyrator transform

2016 ◽  
Author(s):  
Juan M. Vilardy O ◽  
Maria S. Millan ◽  
Elisabet Perez-Cabre
Keyword(s):  
Security System ◽  
Joint Transform Correlator ◽  
Encrypted Image ◽  
Gyrator Transform

Holographic security system based on image domain joint transform correlator

2002 ◽  
Author(s):  
Michael Borisov ◽  
Sergey B. Odinokov ◽  
Leonid A. Bondarev ◽  
Sergey V. Kurakin ◽  
Sergey V. Matveyev ◽  
...  
Keyword(s):  
Security System ◽  
Joint Transform Correlator ◽  
Image Domain

scholarly journals Image Processing Operators Based on the Gyrator Transform: Generalized Shift, Convolution and Correlation

Photonics ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 120
Author(s):  
Ronal A. Perez ◽  
Juan M. Vilardy O. ◽  
Cesar O. Torres M.
Keyword(s):  
Image Processing ◽  
Light Propagation ◽  
Sampling Theorem ◽  
Optical Image ◽  
Joint Transform Correlator ◽  
Simultaneous Application ◽  
Spatial Shift ◽  
Generalized Shift ◽  
Gyrator Transform ◽  
Nonlinear Joint

The gyrator transform (GT) is used for images processing in applications of light propagation. We propose new image processing operators based on the GT, these operators are: Generalized shift, convolution and correlation. The generalized shift is given by a simultaneous application of a spatial shift and a modulation by a pure linear phase term. The new operators of convolution and correlation are defined using the GT. All these image processing operators can be used in order to design and implement new optical image processing systems based on the GT. The sampling theorem for images whose resulting GT has finite support is developed and presented using the previously defined operators. Finally, we describe and show the results for an optical image encryption system using a nonlinear joint transform correlator and the proposed image processing operators based on the GT.

scholarly journals Nonlinear optical security system based on a joint transform correlator in the Fresnel domain

2014 ◽  
Vol 53 (8) ◽  
pp. 1674 ◽  
Author(s):  
Juan M. Vilardy ◽  
María S. Millán ◽  
Elisabet Pérez-Cabré
Keyword(s):  
Nonlinear Optical ◽  
Security System ◽  
Joint Transform Correlator ◽  
Optical Security System
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