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Jordi Vitria; Petia Radeva; X. Binefa |
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Title |
EigenHistograms: using low dimensional models of color distribution for real time object recognition |
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1999 |
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Ljubliana, Slovenia, Springer-Verlag |
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OR;MILAB;MV |
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BCNPCL @ bcnpcl @ VRB1999a |
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29 |
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Author |
Jordi Vitria; Petia Radeva; I. Aguilo |
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Title |
Recent Advances in Artificial Intelligence Research and Development |
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2004 |
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Frontiers in Artificial Intelligence and Applications, 113, J. Vitria, P. Radeva, I. Aguilo (Eds.), ISBN: 1–58603–466–9 |
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Amsterdam |
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OR;MILAB;MV |
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BCNPCL @ bcnpcl @ VRA2004 |
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509 |
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Author |
Fernando Vilariño; Ludmila I. Kuncheva; Petia Radeva |
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Title |
ROC curves and video analysis optimization in intestinal capsule endoscopy |
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Year |
2006 |
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Pattern Recognition Letters |
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PRL |
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27 |
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8 |
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875–881 |
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ROC curves; Classification; Classifiers ensemble; Detection of intestinal contractions; Imbalanced classes; Wireless capsule endoscopy |
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Wireless capsule endoscopy involves inspection of hours of video material by a highly qualified professional. Time episodes corresponding to intestinal contractions, which are of interest to the physician constitute about 1% of the video. The problem is to label automatically time episodes containing contractions so that only a fraction of the video needs inspection. As the classes of contraction and non-contraction images in the video are largely imbalanced, ROC curves are used to optimize the trade-off between false positive and false negative rates. Classifier ensemble methods and simple classifiers were examined. Our results reinforce the claims from recent literature that classifier ensemble methods specifically designed for imbalanced problems have substantial advantages over simple classifiers and standard classifier ensembles. By using ROC curves with the bagging ensemble method the inspection time can be drastically reduced at the expense of a small fraction of missed contractions. |
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800 |
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MILAB;MV;SIAI |
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BCNPCL @ bcnpcl @ VKR2006; IAM @ iam @ VKR2006 |
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647 |
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Author |
Jordi Vitria |
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Title |
Introduccio a la Morfologia Matematica |
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1996 |
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CVC Technical Report #06 |
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CVC (UAB) |
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OR;MV |
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BCNPCL @ bcnpcl @ Vit1996b |
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90 |
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Author |
Jordi Vitria |
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Title |
Disseny de sistemes (intel.ligents) de visio. |
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1996 |
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OR;MV |
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BCNPCL @ bcnpcl @ Vit1996a |
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88 |
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Author |
Fernando Vilariño; Petia Radeva |
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Title |
Cardiac Segmentation with Discriminant Active Contours |
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2003 |
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211–217 |
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Dynamic tracking of heart moving is one relevant target in medical imag- ing and can be helpful for analyzing heart dynamics in the study of several cardiac diseases. For this aim, a previous segmentation problem of such structures is stated, based on certain relevant features (like edges or intensity levels, textures, etc.) Clas- sical active models have been used, but they fail when overlapping structures or not well-defined contours are present. Automatic feature learning systems may be a pow- erful tool. Discriminant active contours present optimal results in this kind of problem. They are a kind of deformable models that converge to an optimal object segmenta- tion that dynamically adapts to the object contour. The feature space is designed from a filter bank in order to guarantee the search and learning of the set of relevant fea- tures for optimal classification on each part of the object. Tracking of target evolution is obtained through the whole set of images, using information from the actual and previous stages. Feedback systems are implemented to guarantee the minimum well- separable classification set in each segmentation step. Our implementation has been proved with several series of Magnetic Resonance with improved results in segmenta- tion in comparison to previous methods. |
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Palma de Mallorca |
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IOS Press |
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CCIA |
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MV;MILAB;SIAI |
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BCNPCL @ bcnpcl @ ViR2003; IAM @ iam @ VRa2003 |
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426 |
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Author |
Fernando Vilariño; Petia Radeva |
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Title |
Patch-Optimized Discriminant Active Contours for Medical Image Segmentation. |
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2002 |
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Iberoamerican Conference on Artificial Intelligence |
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Sevilla, Espanya |
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Springer Verlag |
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IBERAMIA |
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MV;MILAB;SIAI |
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BCNPCL @ bcnpcl @ ViR2002; IAM @ iam @ VRa2003 |
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320 |
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Jordi Vitria; J. Llacer |
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Title |
Reconstructing 3D light microscopic images using the EM algorithm |
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1996 |
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Pattern Recognition Letters |
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17 |
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14 |
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1491–1498 |
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OR;MV |
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BCNPCL @ bcnpcl @ ViL1996 |
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74 |
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Jordi Vitria; J. Llacer |
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Title |
Recovering brightness and depth from focus using the Expectation-Maximization Algorithm. |
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1995 |
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VI National Simposium on Pattern Recognition and image Analysis |
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Cordoba |
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OR;MV |
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BCNPCL @ bcnpcl @ ViL1995 |
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134 |
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Jordi Vitria; J. Llacer |
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Recovering Depth from Focus Using Iterative image Estimation Techniques. |
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1993 |
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Tech.Report BL–35158, Lawrence Berkeley Laboratory. |
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University of California; Berkeley; USA; |
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BCNPCL @ bcnpcl @ ViL1993 |
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142 |
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Jordi Vitria; C. Gratin; D. Seron; F. Moreso |
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Morphological image analysis for quantification of renal damage |
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1995 |
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CVC Technical Report #02 |
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CVC (UAB) |
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OR;MV |
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BCNPCL @ bcnpcl @ VGS1995 |
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117 |
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Xavier Baro; Sergio Escalera; Petia Radeva; Jordi Vitria |
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Generic Object Recognition in Urban Image Databases |
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2009 |
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12th International Conference of the Catalan Association for Artificial Intelligence |
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202 |
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27-34 |
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In this paper we propose the construction of a visual content layer which describes the visual appearance of geographic locations in a city. We captured, by means of a Mobile Mapping system, a huge set of georeferenced images (>500K) which cover the whole city of Barcelona. For each image, hundreds of region descriptions are computed off-line and described as a hash code. All this information is extracted without an object of reference, which allows to search for any type of objects using their visual appearance. A new Visual Content layer is built over Google Maps, allowing the object recognition information to be organized and fused with other content, like satellite images, street maps, and business locations. |
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Cardona (Spain) |
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978-1-60750-061-2 |
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OR;MILAB;HuPBA;MV |
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BCNPCL @ bcnpcl @ VER2009 |
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1183 |
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Jordi Vitria; X. Binefa; Juan J. Villanueva |
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Morphological Algorithms for Visual Analysis of Integrated Circuits. |
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1992 |
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Journal of Visual Communications and image Representation, Vol.3, No.2, pp.194–202. |
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BCNPCL @ bcnpcl @ VBV1992 |
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248 |
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Jordi Vitria; M. Bressan; Petia Radeva |
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Bayesian classification of cork stoppers using class-conditional independent component analysis |
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2007 |
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IEEE Transactions on Systems, Man and Cybernetics (Part C), 37(1): 32–38 (ISI 0,482) |
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BCNPCL @ bcnpcl @ VBR2007 |
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795 |
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Jordi Vitria; M. Bressan; Petia Radeva |
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Bayesian classification of cork stoppers using class-conditional independent component analysis |
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2006 |
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IEEE Transactions on Systems, Man and Cybernetics (Part C), 36(6) |
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BCNPCL @ bcnpcl @ VBR2006 |
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723 |
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