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M. Bressan, David Guillamet, & Jordi Vitria. (2004). Multiclass Object Recognition using Class-Conditional Independent Component Analisis. Cybernetics and Systems, 35/1:35–61 (IF: 0.768).
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Xavier Otazu, M. Ribo, J.M. Paredes, M. Peracaula, & J. Nuñez. (2004). Multiresolution approach for period determination on unevenly sampled data. Monthly Notices of the Royal Astronomical Society, 351:251–219 (IF: 5.238).
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David Masip, & Jordi Vitria. (2004). Object Recognition using Boosted Adaptive Features..
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Zhong Jin, & Franck Davoine. (2004). Orthogonal ICA Representation Of Images.
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Ernest Valveny, & Philippe Dosch. (2004). Performance Evaluation of Symbol Recognition. In A. D.(E.) S. Marinai (Ed.), Document Analysis Systems (Vol. 3163, 354–365).
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David Masip, & Jordi Vitria. (2004). Real Time Face Detection and Verification for Uncontrolled Environments.
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Jordi Vitria, Petia Radeva, & I. Aguilo. (2004). Recent Advances in Artificial Intelligence Research and Development. In Frontiers in Artificial Intelligence and Applications, 113, J. Vitria, P. Radeva, I. Aguilo (Eds.), ISBN: 1–58603–466–9.
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Jaume Amores, & Petia Radeva. (2004). Registration and retrieval of medical images. Application to IVUS.
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Oriol Martinez. (2004). Semantic Retrieval of Memory Color Content.
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Debora Gil, & Petia Radeva. (2004). Shape Restoration via a Regularized Curvature Flow. Journal of Mathematical Imaging and Vision, 21(3), 205–223.
Abstract: Any image filtering operator designed for automatic shape restoration should satisfy robustness (whatever the nature and degree of noise is) as well as non-trivial smooth asymptotic behavior. Moreover, a stopping criterion should be determined by characteristics of the evolved image rather than dependent on the number of iterations. Among the several PDE based techniques, curvature flows appear to be highly reliable for strongly noisy images compared to image diffusion processes.
In the present paper, we introduce a regularized curvature flow (RCF) that admits non-trivial steady states. It is based on a measure of the local curve smoothness that takes into account regularity of the curve curvature and serves as stopping term in the mean curvature flow. We prove that this measure decreases over the orbits of RCF, which endows the method with a natural stop criterion in terms of the magnitude of this measure. Further, in its discrete version it produces steady states consisting of piece-wise regular curves. Numerical experiments made on synthetic shapes corrupted with different kinds of noise show the abilities and limitations of each of the current geometric flows and the benefits of RCF. Finally, we present results on real images that illustrate the usefulness of the present approach in practical applications.
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Misael Rosales, Petia Radeva, J. Mauri, & Oriol Pujol. (2004). Simulation Model of Intravascular Ultrasound Images.
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Raul Chaves. (2004). Sistema de identificacion mediante huellas dactilares.
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Jordi Gonzalez, Javier Varona, Xavier Roca, & Juan J. Villanueva. (2004). Situation Graph Trees for Human Behavior Modeling.
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David Guillamet. (2004). Statistical Local Appearance Models for Object Recognition (Jordi Vitria, Ed.). Ph.D. thesis, , .
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Angel Sappa. (2004). Surface Model Generation from Range Images of Industrial Environments.
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