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Author Xavier Otazu; Maria Vanrell; C. Alejandro Parraga edit  openurl
Title Multiresolution Wavelet Framework Models Brightness Induction Effects Type Journal
Year 2008 Publication (down) Vision Research Abbreviated Journal VR  
Volume 48 Issue 5 Pages 733–751  
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Notes CIC Approved no  
Call Number CAT @ cat @ OVP2008a Serial 927  
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Author Ivet Rafegas; Maria Vanrell edit   pdf
url  doi
openurl 
Title Color encoding in biologically-inspired convolutional neural networks Type Journal Article
Year 2018 Publication (down) Vision Research Abbreviated Journal VR  
Volume 151 Issue Pages 7-17  
Keywords Color coding; Computer vision; Deep learning; Convolutional neural networks  
Abstract Convolutional Neural Networks have been proposed as suitable frameworks to model biological vision. Some of these artificial networks showed representational properties that rival primate performances in object recognition. In this paper we explore how color is encoded in a trained artificial network. It is performed by estimating a color selectivity index for each neuron, which allows us to describe the neuron activity to a color input stimuli. The index allows us to classify whether they are color selective or not and if they are of a single or double color. We have determined that all five convolutional layers of the network have a large number of color selective neurons. Color opponency clearly emerges in the first layer, presenting 4 main axes (Black-White, Red-Cyan, Blue-Yellow and Magenta-Green), but this is reduced and rotated as we go deeper into the network. In layer 2 we find a denser hue sampling of color neurons and opponency is reduced almost to one new main axis, the Bluish-Orangish coinciding with the dataset bias. In layers 3, 4 and 5 color neurons are similar amongst themselves, presenting different type of neurons that detect specific colored objects (e.g., orangish faces), specific surrounds (e.g., blue sky) or specific colored or contrasted object-surround configurations (e.g. blue blob in a green surround). Overall, our work concludes that color and shape representation are successively entangled through all the layers of the studied network, revealing certain parallelisms with the reported evidences in primate brains that can provide useful insight into intermediate hierarchical spatio-chromatic representations.  
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Notes CIC; 600.051; 600.087 Approved no  
Call Number Admin @ si @RaV2018 Serial 3114  
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Author X. Binefa; Jordi Vitria; Maria Vanrell edit  openurl
Title Reconstruccion tridimensional de imagenes Microscopicas. Type Miscellaneous
Year 1992 Publication (down) V Simposium Nacional de Reconocimiento de Formas y Analisis de Imagenes Abbreviated Journal  
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Notes OR;CIC;MV Approved no  
Call Number BCNPCL @ bcnpcl @ BVV1992b Serial 255  
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Author Eduard Vazquez; Maria Vanrell edit  openurl
Title Eines per al desenvolupament de competencies de enginyeria en un assignatura de Intel·ligencia Artificial Type Miscellaneous
Year 2008 Publication (down) V Jornades d’Innovacio Docent (UAB) Abbreviated Journal  
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Address Bellaterra (Spain)  
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Notes CIC Approved no  
Call Number CAT @ cat @ VaV2008 Serial 1011  
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Author Agata Lapedriza; Jaume Garcia; Ernest Valveny; Robert Benavente; Miquel Ferrer; Gemma Sanchez edit  openurl
Title Una experiencia de aprenentatge basada en projectes en el ambit de la informatica Type Miscellaneous
Year 2008 Publication (down) V Jornades d’Innovacio Docent (UAB) Abbreviated Journal  
Volume Issue Pages 63  
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Abstract  
Address Bellaterra (Spain)  
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Notes OR; IAM; DAG; CIC; MV Approved no  
Call Number BCNPCL @ bcnpcl @ LGV2008 Serial 1030  
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Author Enric Marti; Jordi Rocarias; Ricardo Toledo edit  openurl
Title Caront: gestió flexible de grups d’alumnes en una asignatura i activitats sobre grups. Nova activitat de control Type Miscellaneous
Year 2008 Publication (down) V Jornades d’Innovació Docent Abbreviated Journal  
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Notes IAM;RV;CIC;ADAS Approved no  
Call Number IAM @ iam @ MRT2008a Serial 1617  
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Author Robert Benavente; Ernest Valveny; Jaume Garcia; Agata Lapedriza; Miquel Ferrer; Gemma Sanchez edit  openurl
Title Una experiencia de adaptacion al EEES de las asignaturas de programacion en Ingenieria Informatica Type Miscellaneous
Year 2008 Publication (down) V Congreso Iberoamericano de Docencia Universitaria, pp. 213–216 Abbreviated Journal  
Volume Issue Pages  
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Address Valencia  
Corporate Author Thesis  
Publisher Place of Publication Editor  
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Area Expedition Conference  
Notes OR;DAG;CIC;MV Approved no  
Call Number BCNPCL @ bcnpcl @ BVG2008 Serial 1031  
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Author O. Fors; Xavier Otazu; J. Nuñez edit  openurl
Title Fusion Mediante Wavelets de Imagenes Spot-pan y del Satelite Tailandes TMSAT. Type Miscellaneous
Year 2001 Publication (down) Teledeteccion, Medio Ambiente y Cambio Global, IX Congreso Nacional de Teledeteccion, 546–550. Abbreviated Journal  
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Abstract  
Address Lleida  
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Notes CIC Approved no  
Call Number CAT @ cat @ FON2001 Serial 94  
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Author Xavier Otazu; J. Nuñez edit  openurl
Title Algoritmo de Clasificacion no Supervisada Basado en Wavelets. Type Miscellaneous
Year 2001 Publication (down) Teledeteccion, Medio Ambiente y Cambio Global, IX Congreso Nacional de Teledeteccion, 437–440. Abbreviated Journal  
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Address Lleida  
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Notes CIC Approved no  
Call Number CAT @ cat @ ONu2001 Serial 147  
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Author Maria Vanrell; Jordi Vitria; Xavier Roca edit  openurl
Title A General Morphological Framework for Perceptual Texture Discrimination based on Granulometries. Type Miscellaneous
Year 1993 Publication (down) Technical Workshop on Mathematical Morphology and its Applications to Signal Processing. Abbreviated Journal  
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Address Barcelona  
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Notes OR;ISE;CIC;MV Approved no  
Call Number BCNPCL @ bcnpcl @ VVR1993 Serial 154  
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Author Maria Vanrell; Jordi Vitria edit  openurl
Title Mathematical Morphology, Granulometries and Texture Perception. Type Miscellaneous
Year 1993 Publication (down) SPIE International Symposium on Optical Instrumentation and Applied Science (Conference on image Algebra and Morphological image Processing IV). Abbreviated Journal  
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Address San Diego; CA; USA  
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Notes OR;CIC;MV Approved no  
Call Number BCNPCL @ bcnpcl @ VaV1993 Serial 178  
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Author Yasuko Sugito; Trevor Canham; Javier Vazquez; Marcelo Bertalmio edit  url
doi  openurl
Title A Study of Objective Quality Metrics for HLG-Based HDR/WCG Image Coding Type Journal
Year 2021 Publication (down) SMPTE Motion Imaging Journal Abbreviated Journal SMPTE  
Volume 130 Issue 4 Pages 53 - 65  
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Abstract In this work, we study the suitability of high dynamic range, wide color gamut (HDR/WCG) objective quality metrics to assess the perceived deterioration of compressed images encoded using the hybrid log-gamma (HLG) method, which is the standard for HDR television. Several image quality metrics have been developed to deal specifically with HDR content, although in previous work we showed that the best results (i.e., better matches to the opinion of human expert observers) are obtained by an HDR metric that consists simply in applying a given standard dynamic range metric, called visual information fidelity (VIF), directly to HLG-encoded images. However, all these HDR metrics ignore the chroma components for their calculations, that is, they consider only the luminance channel. For this reason, in the current work, we conduct subjective evaluation experiments in a professional setting using compressed HDR/WCG images encoded with HLG and analyze the ability of the best HDR metric to detect perceivable distortions in the chroma components, as well as the suitability of popular color metrics (including ΔITPR , which supports parameters for HLG) to correlate with the opinion scores. Our first contribution is to show that there is a need to consider the chroma components in HDR metrics, as there are color distortions that subjects perceive but that the best HDR metric fails to detect. Our second contribution is the surprising result that VIF, which utilizes only the luminance channel, correlates much better with the subjective evaluation scores than the metrics investigated that do consider the color components.  
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Notes CIC Approved no  
Call Number SCV2021 Serial 3671  
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Author Partha Pratim Roy; Eduard Vazquez; Josep Llados; Ramon Baldrich; Umapada Pal edit  openurl
Title A System to Retrieve Text/Symbols from Color Maps using Connected Component and Skeleton Analysis Type Conference Article
Year 2007 Publication (down) Seventh IAPR International Workshop on Graphics Recognition Abbreviated Journal  
Volume Issue Pages 79–78  
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Address Curitiba (Brasil)  
Corporate Author Thesis  
Publisher Place of Publication Editor J. Llados, W. Liu, J.M. Ogier  
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Series Editor Series Title Abbreviated Series Title  
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ISSN ISBN Medium  
Area Expedition Conference GREC  
Notes CAT; DAG;CIC Approved no  
Call Number CAT @ cat @ RVL2007 Serial 836  
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Author O. Fors; J. Nuñez; Xavier Otazu; A. Prades; Robert D. Cardinal edit  doi
openurl 
Title Improving the Ability of Image Sensors to Detect Faint Stars and Moving Objects Using Image Deconvolution Techniques Type Journal Article
Year 2010 Publication (down) Sensors Abbreviated Journal SENS  
Volume 10 Issue 3 Pages 1743–1752  
Keywords image processing; image deconvolution; faint stars; space debris; wavelet transform  
Abstract Abstract: 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). In the case of faint stars, we show that this benefit is equivalent to double the quantum efficiency of the used image sensor or to increase the effective telescope aperture by more than 30% without decreasing the astrometric precision or introducing artificial bias. In the case of orbital objects, the deconvolution technique can double the signal-to-noise ratio of the image, which helps to discover and control dangerous objects as space debris or lost satellites. The benefits obtained using CCD detectors can be extrapolated to any kind of image sensors.  
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Notes CIC Approved no  
Call Number CAT @ cat @ FNO2010 Serial 1285  
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Author Xavier Otazu; Olivier Penacchio; Xim Cerda-Company edit  url
openurl 
Title Brightness and colour induction through contextual influences in V1 Type Conference Article
Year 2015 Publication (down) Scottish Vision Group 2015 SGV2015 Abbreviated Journal  
Volume 12 Issue 9 Pages 1208-2012  
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Address Carnoustie; Scotland; March 2015  
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Area Expedition Conference SGV  
Notes NEUROBIT;CIC Approved no  
Call Number Admin @ si @ OPC2015a Serial 2632  
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Author Felipe Lumbreras; Ramon Baldrich; Maria Vanrell; Joan Serrat; Juan J. Villanueva edit  openurl
Title Multiresolution texture classification of ceramic tiles. Type Book Chapter
Year 1999 Publication (down) Recent Research developments in optical engineering, Research Signpost, 2: 213–228 Abbreviated Journal  
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Address India  
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Notes ADAS;CIC Approved no  
Call Number ADAS @ adas @ LBV1999b Serial 45  
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Author Judit Martinez; Eva Costa; P. Herreros; F. Javier Sanchez; Ramon Baldrich edit  doi
openurl 
Title A Modular and Scalable Architecture for PC-Based Real-Time Vision Systems Type Journal Article
Year 2003 Publication (down) Real–Time Imaging, (IF: 0.512) Abbreviated Journal  
Volume 9 Issue Pages 99-112  
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Notes CIC Approved no  
Call Number CAT @ cat @ MCH2003b Serial 394  
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Author Felipe Lumbreras; Joan Serrat; Ramon Baldrich; Maria Vanrell; Juan J. Villanueva edit  openurl
Title Color Texture Recognition Through Multiresolution Features Type Miscellaneous
Year 2001 Publication (down) QCAV 2001 International Conference on Quality Control by Artificial Vision, France, 1:114–121. Abbreviated Journal  
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Notes ADAS;CIC Approved no  
Call Number ADAS @ adas @ LSB2001 Serial 124  
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