Home > Search Results: Ahouzi, Esmail
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UAB Digital Repository of Documents 3 records found  Search took 0.00 seconds. 
1.
27 p, 1.1 MB Optical triple random phase encryption / Ahouzi, Esmail (Institut National des Postes et Telecommunications (Marroc)) ; Zamrani, Wiam (Institut National des Postes et Telecommunications (Marroc)) ; Azami, Nawfel (Institut National des Postes et Telecommunications (Marroc)) ; Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física) ; Yzuel Giménez, María Josefa (Universitat Autònoma de Barcelona. Departament de Física)
We propose an optical security technique for image encryption using triple random-phase encoding (TRPE). In the encryption process, the original image is first double-random-phase encrypted. The obtained function is then multiplied by a third random-phase key in the output plane, to enhance the security level of the encryption process. [...]
2017 - 10.1117/1.OE.56.11.113114
Optical engineering, Vol. 56, issue 11 (Nov. 2017) , p. 113114-1-8  
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2.
31 p, 2.3 MB Optical image encryption technique based on deterministic phase masks / Zamrani, Wiam (Institut National des Postes et Telecommunications (Marroc)) ; Ahouzi, Esmail (Institut National des Postes et Telecommunications (Marroc)) ; Lizana Tutusaus, Ángel (Universitat Autònoma de Barcelona. Departament de Física) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física) ; Yzuel Giménez, María Josefa (Universitat Autònoma de Barcelona. Departament de Física)
The double-random phase encoding (DRPE) scheme, which is based on a 4f optical correlator system, is considered as a reference for the optical encryption field. We propose a modification of the classical DRPE scheme based on the use of a class of structured phase masks, the deterministic phase masks. [...]
2016 - 10.1117/1.OE.55.10.103108
Optical engineering, Vol. 55, Num. 10 (Oct 2016) , p. 103108  
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3.
3 p, 357.5 KB Phase-only filter with improved discrimination / Ahouzi, Esmail (Universitat Autònoma de Barcelona. Departament de Física) ; Campos Coloma, Juan (Universitat Autònoma de Barcelona. Departament de Física) ; Yzuel Giménez, María Josefa (Universitat Autònoma de Barcelona. Departament de Física)
The optimization of a phase-only filter (POF) in terms of discrimination capability is presented. The notion of a phase-difference histogram and its modification are proposed for selecting the support function of the POF. [...]
1994 - 10.1364/OL.19.001340
Optics letters, Vol. 19, No. 17 (1 September 1994) , p. 1340-1342  
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