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Found
11
records in 0.02 seconds.
Articles
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8
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,
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Articles
8
records found
1.
40 p, 535.7 KB
Multiresolution wavelet framework models brightness induction effects
/
Otazu Porter, Xavier
(Universitat Autònoma de Barcelona. Departament de Ciències de la Computació) ;
Vanrell i Martorell, Maria Isabel
(Centre de Visió per Computador (Bellaterra, Catalunya)) ;
Parraga, Carlos Alejandro
(Universitat Autònoma de Barcelona. Departament de Ciències de la Computació)
A new multiresolution wavelet model is presented here, which accounts for brightness assimilation and contrast effects in a unified framework, and includes known psychophysical and physiological attributes of the primate visual system (such as spatial frequency channels, oriented receptive fields, contrast sensitivity function, contrast non-linearities, and a unified set of parameters). [...]
2008 -
10.1016/j.visres.2007.12.008
Vision Research
,
Vol. 48, Issue 5 (February 2008)
, p. 733-751
Detailed record
-
2.
15 p, 32.5 MB
Wavelet-Based Visible and Infrared Image Fusion : A Comparative Study
/
Sappa, Angel Domingo
(Centre de Visió per Computador (Bellaterra, Catalunya)) ;
Carvajal, Juan A.
(Escuela Superior Politécnica del Litoral) ;
Aguilera, Cristhian A
(Universitat Autònoma de Barcelona. Departament de Ciències de la Computació) ;
Oliveira, Miguel
(Institute of Electronics and Informatics Engineering of Aveiro)
;
Romero, Dennis
(Escuela Superior Politécnica del Litoral) ;
Vintimilla, Boris X.
(Escuela Superior Politécnica del Litoral)
This paper evaluates different wavelet-based cross-spectral image fusion strategies adopted to merge visible and infrared images. The objective is to find the best setup independently of the evaluation metric used to measure the performance. [...]
2016 -
10.3390/s16060861
Sensors (Basel, Switzerland)
,
Vol. 16, Issue 6 (June 2016)
, art. 861
Detailed record
-
3.
15 p, 7.0 MB
Optimization of Sensors to be Used in a Voltammetric Electronic Tongue Based on Clustering Metrics
/
Sarma, Munmi
(Universitat Autònoma de Barcelona. Departament de Química) ;
Romero, Noelia
(Universitat Autònoma de Barcelona. Departament de Química) ;
Cetó Alsedà, Xavier
(Universitat Autònoma de Barcelona. Departament de Química) ;
Valle Zafra, Manuel del
(Universitat Autònoma de Barcelona. Departament de Química)
Herein we investigate the usage of principal component analysis (PCA) and canonical variate analysis (CVA), in combination with the F factor clustering metric, for the a priori tailored selection of the optimal sensor array for a given electronic tongue (ET) application. [...]
2020 -
10.3390/s20174798
Sensors (Basel, Switzerland)
,
Vol. 20, Issue 17 (September 2020)
, art. 4798
Detailed record
-
4.
14 p, 1.1 MB
Detection of retinal blood vessels from ophthalmoscope images using morphological approach
/
Dash, Jyotiprava
(Veer Surendra Sai University of Technology (Burla, Índia)) ;
Bhoi, Nilamani
(Veer Surendra Sai University of Technology (Burla, Índia))
Accurate segmentation of retinal blood vessels is an essential task for diagnosis of various pathological disorders. In this paper, a novel method has been introduced for segmenting retinal blood vessels which involves pre-processing, segmentation and post-processing. [...]
2017 -
10.5565/rev/elcvia.913
ELCVIA : Electronic Letters on Computer Vision and Image Analysis
,
Vol. 16 Núm. 1 (2017)
, p. 1-14 (Regular Issue)
Detailed record
-
5.
10 p, 377.1 KB
Improving the Ability of Image Sensors to Detect Faint Stars and Moving Objects Using Image Deconvolution Techniques
/
Fors Aldrich, Octavi
(Universitat de Barcelona. Departament d'Astronomia i Meteorologia) ;
Otazu Porter, Xavier
(Universitat Autònoma de Barcelona. Departament de Ciències de la Computació) ;
Nuñez, Jorge
(Universitat de Barcelona. Departament d'Astronomia i Meteorologia) ;
Prades, Albert
(Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica)
;
Cardinal, Robert D.
(University of Calgary (Calgary, Canadà))
In this paper we show how the techniques of image deconvolution can increase the ability of image sensors as, for example, CCD imagers, to detect faint stars or faint orbital objects (small satellites and space debris). [...]
2010 -
10.3390/s100301743
Sensors (Basel, Switzerland)
,
Vol. 10 (2010)
, p. 1743-1752
Detailed record
-
6.
14 p, 1.5 MB
Implementation of the DWT in a GPU through a register-based strategy
/
Enfedaque Montes, Pablo
(Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ;
Aulí Llinàs, Francesc
(Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ;
Moure, Juan C
(Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius)
The release of the CUDA Kepler architecture in March 2012 has provided Nvidia GPUs with a larger register memory space and instructions for the communication of registers among threads. This facilitates a new programming strategy that utilizes registers for data sharing and reusing in detriment of the shared memory. [...]
2015 -
10.1109/TPDS.2014.2384047
IEEE transactions on parallel and distributed systems
,
Vol. 26 Issue 12 (December 2015)
, p. 3394-3406
Detailed record
-
7.
21 p, 1.7 MB
A New Image Fusion Technique Based on Directive Contrast
/
Bhatnagar, Gaurav
(Indian Institute of Technology Roorkee (Roorkee, Índia). Departmen of Mathematics) ;
Raman, Balasubramanian
(Indian Institute of Technology Roorkee (Roorkee, Índia). Departmen of Mathematics)
For making an image, which is more suitable for segmentation, feature extraction, object recognition, and Human Visual System, image fusion is frequently used technique. It combines complimentary information from different images of the same scene in a single image. [...]
2009 -
10.5565/rev/elcvia.287
ELCVIA : Electronic Letters on Computer Vision and Image Analysis
,
V. 8 n. 2 (2009)
p. 18-38
Detailed record
-
8.
10 p, 421.4 KB
Redundant Wavelet Watermarking using Spread Spectrum Modulation
/
Mankar, V. H.
(Jadavpur University (Kolkata Índia). Department of Electronics and Telecommunication Engineering) ;
Das, T. S.
(Jadavpur University (Kolkata Índia). Department of Electronics and Telecommunication Engineering) ;
Sarkar, S.
(Jadavpur University (Kolkata Índia). Department of Electronics and Telecommunication Engineering)
Spread Spectrum modulation has become a preferred paradigm in many watermarking applications. This paper analyzes the performance of such a blind watermarking scheme under discrete wavelet frame rather than a traditional orthonormal wavelet expansion. [...]
2008 -
10.5565/rev/elcvia.267
ELCVIA : Electronic Letters on Computer Vision and Image Analysis
,
V. 7 n. 2 (2008)
p. 1-10
Detailed record
-
Research literature
3
records found
1.
10 p, 1.5 MB
Estudio y desarrollo de métodos para comparar vídeos
/
Troconis Abreu, Eduardo Arturo
;
Serra Ruiz, Jordi,
dir. (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació) ;
Universitat Autònoma de Barcelona.
Escola d'Enginyeria
Este trabajo tiene como objetivo llevar a cabo una investigación exhaustiva sobre las técnicas utilizadas para comparar el contenido audiovisual con el fin de mejorar un método existente o desarrollar uno nuevo. [...]
This paper aims to carry out a comprehensive investigation into the techniques used to compare audiovisual content to improve an existing method or develop a new one. A video perceptual hash function based on the extraction of a fixed binary string from the perceptual content of audiovisual material is presented. [...]
Aquest treball té com a objectiu realitzar una investigació exhaustiva sobre les tècniques utilitzades per comparar el contingut audiovisual per tal de millorar un mètode existent o desenvolupar-ne un de nou. [...]
2023
Enginyeria Informàtica
[
958
]
Detailed record
-
2.
10 p, 1.1 MB
Estudi d'optimització per a regression wavelet analysis a través de models de regressió combinats
/
Martín Somé, Ángel
;
Serra Sagristà, Joan,
dir. (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions) ;
Universitat Autònoma de Barcelona.
Escola d'Enginyeria
Basant-nos en el treball realitzat a l'article "Regression wavelet analysis for lossless coding of remote-sensing data", es presenta un aprofundiment en la matèria intentant trobar punts de millora pel que fa a rendiment de compressió o el cost computacional de la transformació. [...]
Based on the work of "Regression wavelet analysis for lossless coding of remote-sensing data", a new approach is presented trying to introduce an improvement in matter on compress performance or computational cost. [...]
Basándonos en el trabajo realizado en el artículo "Regression wavelet analysis for lossless coding of remote-sensing data", se presenta una profundización en la materia intentando encontrar puntos de mejora en cuanto al rendimiento de compresión o el coste computacional de la transformación. [...]
2016-06-28
Enginyeria Informàtica
[
958
]
Detailed record
-
3.
12 p, 933.7 KB
Establiment d'una mètrica per mesurar la diferència d'imatges
/
Hernández Juárez, Dani
;
Pàrraga, Alejandro,
dir. (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació) ;
Universitat Autònoma de Barcelona.
Escola d'Enginyeria
Es presenta una nova mètrica basada en [1], afegint l'assimilació de luminància i efectes de contrast que inclouen atributs psicofísics i psicològics coneguts del sistema visual del primat, amb la contribució del model CIWaM de Xavier Otazu et al [2], [3], que són les suposicions relacionades amb la freqüència espacial i el contrast d'entorn. [...]
Se presenta una nueva métrica basada en [1], añadiendo la asimilación de luminancia y efectos de contraste que incluyen atributos psicofísicos y psicológicos conocidos del sistema visual del primate, con la contribución del modelo de CIWaM de Xavier Otazu et al [2], [3], que son las suposiciones relacionadas con la frecuencia espacial y el contraste del entorno. [...]
A new metric is presented based on a previous metric [1], we add brightness assimilation and constrast effects that include known psychophysical and physiological attributes of the primate visual system, with the contribution of CIWaM model Xavier Otazu et al [2], [3], they are assumptions related to the spatial frequency and the contrast surround energy. [...]
2014-06-29
Enginyeria Informàtica
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958
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Detailed record
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