Exploració per autor "Pérez Cabré, Elisabet"
Ara es mostren els items 21-40 de 76
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Encryption and validation of multiple signals for optical identification systems
Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario; Javidi, Bahram (IOP Publishing, 2007)
Text en actes de congrés
Accés restringit per política de l'editorialMultifactor encryption-authentication technique reinforces optical security by allowing the simultaneous AND-verification of more than one primary image. Instead of basing the identification on a unique signature or piece ... -
Etiquetas ópticas identificativas invariantes a deformaciones de perspectiva y distorsión
Horrillo, Sergi; Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario; Javidi, Bahram (2009)
Comunicació de congrés
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Experimental color encryption in a joint transform correlator architecture
Tebaldi, Myriam; Horrillo, Sergio; Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario; Amaya, Dafne; Torroba, Roberto; Bolognini, Néstor (Institute of Physics (IOP), 2010)
Comunicació de congrés
Accés obertWe present an experimental color image encryption by using a photorefractive crystal and a joint transform correlator (JTC) architecture. We achieve the color storing by changing the illumination wavelength. One JTC aperture ... -
Experimental optical encryption scheme for the double random phase encoding using a nonlinear joint transform correlator
Vilardy Ortiz, Juan Manuel; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (2020-09-01)
Article
Accés obertWe present a new experimental system for optical encryption using a nonlinear joint transform correlator (JTC) to implement the optical security technique of the double random phase encoding (DRPE). The DRPE, which is ... -
First-order and multi-order diffractive lens using a device with 8P phase modulation range
Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario (IEEE Press, 2016)
Comunicació de congrés
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Frecuencia de parpadeo y parpadeos incompletos en seis condiciones controladas de lectura en formato electrónico y en papel
Argilés Sans, Marc; Cardona Torradeflot, Genís; Pérez Cabré, Elisabet; Rodríguez Montiel, Margarita (2016)
Comunicació de congrés
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Generalized formulation of an encryption system based on a joint transform correlator and fractional Fourier transform
Vilardy Ortiz, Juan Manuel; Torres, Yezid; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (Institute of Physics (IOP), 2014-12-01)
Article
Accés obertWe propose a generalization of the encryption system based on double random phase encoding (DRPE) and a joint transform correlator (JTC), from the Fourier domain to the fractional Fourier domain (FrFD) by using the fractional ... -
Graphical ray tracing through imaging optical systems for optometrists
Millán Garcia-Varela, M. Sagrario; Escofet Soteras, Jaume; Pérez Cabré, Elisabet; Cobo Ruiz, Fernando (ITMO University (University of Information Technologies, Mechanics and Optics), 2008)
Comunicació de congrés
Accés restringit per política de l'editorialIn the approach of geometrical optics, ray tracing is an illustrative tool to determine the light path through an optical system. We show different educational resources used to help students to develop their skills ... -
Image encryption system based on a nonlinear joint transform correlator for the simultaneous authentication of two users
Vilardy Ortiz, Juan Manuel; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (2019-01-01)
Article
Accés obertWe propose a new encryption system based on a nonlinear joint transform correlator (JTC) using the information of two biometrics (one digital fingerprint for each user) as security keys of the encryption system. In order ... -
Image formation with lenses, pinholes and slits in an optical box
Escofet Soteras, Jaume; Pérez Cabré, Elisabet (Hands-on Science Network, 2023)
Comunicació de congrés
Accés restringit per política de l'editorialImages formed by systems with small apertures, such as pinholes and slits, have very weak illumination. It is advisable an object with a high luminance and with considerable size to see these images. Besides, the device ... -
Image quality and security through nonlinear joint transform encryption
Vilardy Ortiz, Juan Manuel; Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario (IEEE Press, 2016)
Text en actes de congrés
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Images encryption system based on a fractional joint transform correlator and nonlinear filtering
Vilardy Ortiz, Juan Manuel; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (2014)
Article
Accés obertA new optical security system for image encryption based on a fractional joint transform correlator and nonlinear filtering is proposed. The position of the lens in the proposed optical encryption setup can be chosen, so ... -
Improved decryption quality and security of a joint transform correlator-based encryption system
Vilardy, Juan Manuel; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (IOPScience, 2012-12-06)
Article
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Improved design of optical ID tags for remote validation
Horrillo, Sergi; Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario; Javidi, Bahram (The International Society for Photo-Optical Instrumentation Engineers (SPIE), 2009)
Text en actes de congrés
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Influence of a perturbation in the Gyrator domain for a joint transform correlator-based encryption system
Vilardy Ortiz, Juan Manuel; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2017)
Comunicació de congrés
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Information authentication using photon-counting double-random-phase encrypted images
Pérez Cabré, Elisabet; Cho, M; Javidi, Bahram (2011-01-01)
Article
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Information compression for remote readable ID tags
Horrillo, Sergi; Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario (Institute of Physics (IOP), 2010-10-29)
Article
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Integration of the photon-counting technique and a joint transform correlator to encrypt and authenticate images
Vilardy Ortiz, Juan Manuel; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (Red Iberoamericana de Óptica (RIAO), 2019)
Comunicació de congrés
Accés restringit per política de l'editorial -
Joint transform correlator-based encryption system using the Fresnel transform and nonlinear filtering
Vilardy Ortiz, Juan Manuel; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (2013)
Text en actes de congrés
Accés restringit per política de l'editorial -
Lente programable multifocal: Combinación coaxial y multieje
Romero Pérez, Lenny Alexandra; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (2010)
Article
Accés obert