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Author |
Marc Serra |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Estimating Intrinsic Images from Physical and Categorical Color Cues |
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2010 |
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CVC Technical Report |
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151 |
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Master's thesis |
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Admin @ si @ Ser2010 |
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1345 |
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Author |
Sergio Escalera; Oriol Pujol; Petia Radeva |
![goto web page url](img/www.gif)
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Error-Correcting Output Codes Library |
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Journal Article |
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Year |
2010 |
Publication |
Journal of Machine Learning Research |
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JMLR |
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11 |
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661-664 |
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(Feb):661−664
In this paper, we present an open source Error-Correcting Output Codes (ECOC) library. The ECOC framework is a powerful tool to deal with multi-class categorization problems. This library contains both state-of-the-art coding (one-versus-one, one-versus-all, dense random, sparse random, DECOC, forest-ECOC, and ECOC-ONE) and decoding designs (hamming, euclidean, inverse hamming, laplacian, β-density, attenuated, loss-based, probabilistic kernel-based, and loss-weighted) with the parameters defined by the authors, as well as the option to include your own coding, decoding, and base classifier. |
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1532-4435 |
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MILAB;HUPBA |
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BCNPCL @ bcnpcl @ EPR2010c |
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1286 |
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Author |
Jaume Garcia; Debora Gil; Aura Hernandez-Sabate |
![download PDF file pdf](img/file_PDF.gif)
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Endowing Canonical Geometries to Cardiac Structures |
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Year |
2010 |
Publication |
Statistical Atlases And Computational Models Of The Heart |
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6364 |
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124-133 |
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International conference on Cardiac electrophysiological simulation challenge
In this paper, we show that canonical (shape-based) geometries can be endowed to cardiac structures using tubular coordinates defined over their medial axis. We give an analytic formulation of these geometries by means of B-Splines. Since B-Splines present vector space structure PCA can be applied to their control points and statistical models relating boundaries and the interior of the anatomical structures can be derived. We demonstrate the applicability in two cardiac structures, the 3D Left Ventricular volume, and the 2D Left-Right ventricle set in 2D Short Axis view. |
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Springer Berlin / Heidelberg |
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Camara, O.; Pop, M.; Rhode, K.; Sermesant, M.; Smith, N.; Young, A. |
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Lecture Notes in Computer Science |
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IAM |
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IAM @ iam @ GGH2010b |
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1515 |
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Author |
Pierluigi Casale; Oriol Pujol; Petia Radeva |
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Embedding Random Projections in Regularized Gradient Boosting Machines |
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Conference Article |
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Year |
2010 |
Publication |
Supervised and Unsupervised Ensemble Methods and their Applications in the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases |
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44–53 |
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Barcelona (Spain) |
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SUEMA |
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MILAB;HUPBA |
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no |
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BCNPCL @ bcnpcl @ CPR2010c |
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1466 |
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Author |
Marçal Rusiñol; Josep Llados |
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Efficient Logo Retrieval Through Hashing Shape Context Descriptors |
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Conference Article |
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Year |
2010 |
Publication |
9th IAPR International Workshop on Document Analysis Systems |
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215–222 |
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In this paper, we present an approach towards the retrieval of words from graphical document images. In graphical documents, due to presence of multi-oriented characters in non-structured layout, word indexing is a challenging task. The proposed approach uses recognition results of individual components to form character pairs with the neighboring components. An indexing scheme is designed to store the spatial description of components and to access them efficiently. Given a query text word (ascii/unicode format), the character pairs present in it are searched in the document. Next the retrieved character pairs are linked sequentially to form character string. Dynamic programming is applied to find different instances of query words. A string edit distance is used here to match the query word as the objective function. Recognition of multi-scale and multi-oriented character component is done using Support Vector Machine classifier. To consider multi-oriented character strings the features used in the SVM are invariant to character orientation. Experimental results show that the method is efficient to locate a query word from multi-oriented text in graphical documents. |
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Boston; USA |
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DAS |
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DAG |
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no |
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DAG @ dag @ RuL2010b |
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1434 |
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Permanent link to this record |
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Author |
Bogdan Raducanu; Fadi Dornaika |
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Dynamic Facial Expression Recognition Using Laplacian Eigenmaps-Based Manifold Learning |
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Conference Article |
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Year |
2010 |
Publication |
IEEE International Conference on Robotics and Automation |
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156–161 |
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In this paper, we propose an integrated framework for tracking, modelling and recognition of facial expressions. The main contributions are: (i) a view- and texture independent scheme that exploits facial action parameters estimated by an appearance-based 3D face tracker; (ii) the complexity of the non-linear facial expression space is modelled through a manifold, whose structure is learned using Laplacian Eigenmaps. The projected facial expressions are afterwards recognized based on Nearest Neighbor classifier; (iii) with the proposed approach, we developed an application for an AIBO robot, in which it mirrors the perceived facial expression. |
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Anchorage; AK; USA; |
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1050-4729 |
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978-1-4244-5038-1 |
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ICRA |
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Notes |
OR; MV |
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no |
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BCNPCL @ bcnpcl @ RaD2010 |
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1310 |
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Permanent link to this record |
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Author |
David Geronimo; Antonio Lopez |
![goto web page url](img/www.gif)
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Deteccion de Peatones para Sistemas Avanzados de Asistencia al Conductor |
Type |
Miscellaneous |
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Year |
2010 |
Publication |
UAB Divulga |
Abbreviated Journal |
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Los sistemas de asistencia al conductor, y particularmente los sistemas de protección de peatones, representan uno de los campos de investigación más activos dedicados a la mejora de la seguridad vial. El mayor desafío es el desarrollo de sistemas a bordo fiables de detección de peatones. En esta revisión del estado de la técnica de la detección de peatones, se divide el problema en diferentes etapas, cada una con responsabilidades propias dentro del sistema. Esta división facilita el posterior análisis y discusión de cada uno de los métodos en la literatura, favoreciendo la comparación entre ellos. Finalmente se discuten los temas más importantes de este campo poniendo especial énfasis en las necesidades actuales y los desafíos futuros. |
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Bellaterra (Catalonia), Spain |
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spreading;ADAS |
Approved |
no |
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Call Number |
ADAS @ adas @ GeL2010a |
Serial |
1414 |
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Permanent link to this record |
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Author |
Joan Serrat; Antonio Lopez |
![goto web page url](img/www.gif)
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Deteccion automatica de lineas de carril para la asistencia a la conduccion |
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Miscellaneous |
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Year |
2010 |
Publication |
UAB Divulga – Revista de divulgacion cientifica |
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La detección por cámara de las líneas de carril en las carreteras puede ser una solución asequible a los riesgos de conducción generados por los adelantamientos o las salidas de carril. Este trabajo propone un sistema que funciona en tiempo real y que obtiene muy buenos resultados. El sistema está preparado para identificar las líneas en condiciones de visibilidad poco favorables, como puede ser la conducción nocturna o con otros vehículos que dificulten la visión. |
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Bellaterra (Spain) |
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ADAS |
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no |
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ADAS @ adas @ SeL2010 |
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1430 |
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Permanent link to this record |
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Author |
Sergio Escalera; R. M. Martinez; Jordi Vitria; Petia Radeva; Maria Teresa Anguera |
![download PDF file pdf](img/file_PDF.gif)
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Deteccion automatica de la dominancia en conversaciones diadicas |
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Journal Article |
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Year |
2010 |
Publication |
Escritos de Psicologia |
Abbreviated Journal |
EP |
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Volume |
3 |
Issue |
2 |
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41–45 |
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Keywords |
Dominance detection; Non-verbal communication; Visual features |
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Dominance is referred to the level of influence that a person has in a conversation. Dominance is an important research area in social psychology, but the problem of its automatic estimation is a very recent topic in the contexts of social and wearable computing. In this paper, we focus on the dominance detection of visual cues. We estimate the correlation among observers by categorizing the dominant people in a set of face-to-face conversations. Different dominance indicators from gestural communication are defined, manually annotated, and compared to the observers' opinion. Moreover, these indicators are automatically extracted from video sequences and learnt by using binary classifiers. Results from the three analyses showed a high correlation and allows the categorization of dominant people in public discussion video sequences. |
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1989-3809 |
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HUPBA; OR; MILAB;MV |
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no |
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BCNPCL @ bcnpcl @ EMV2010 |
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1315 |
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Author |
Thierry Brouard; A. Delaplace; Muhammad Muzzamil Luqman; H. Cardot; Jean-Yves Ramel |
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Design of Evolutionary Methods Applied to the Learning of Bayesian Nerwork Structures |
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2010 |
Publication |
Bayesian Network |
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13-37 |
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Sciyo |
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Ahmed Rebai |
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978-953-307-124-4 |
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no |
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Admin @ si @ BDL2010 |
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1461 |
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Author |
Jon Almazan |
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Deforming the Blurred Shape Model for Shape Description and Recognition |
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Report |
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2010 |
Publication |
CVC Technical Report |
Abbreviated Journal |
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Volume |
163 |
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Master's thesis |
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Admin @ si @ Alm2010 |
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1354 |
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Author |
Jaume Garcia; Albert Andaluz; Debora Gil; Francesc Carreras |
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Decoupled External Forces in a Predictor-Corrector Segmentation Scheme for LV Contours in Tagged MR Images |
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Conference Article |
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2010 |
Publication |
32nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society |
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4805-4808 |
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Computation of functional regional scores requires proper identification of LV contours. On one hand, manual segmentation is robust, but it is time consuming and requires high expertise. On the other hand, the tag pattern in TMR sequences is a problem for automatic segmentation of LV boundaries. We propose a segmentation method based on a predictorcorrector (Active Contours – Shape Models) scheme. Special stress is put in the definition of the AC external forces. First, we introduce a semantic description of the LV that discriminates myocardial tissue by using texture and motion descriptors. Second, in order to ensure convergence regardless of the initial contour, the external energy is decoupled according to the orientation of the edges in the image potential. We have validated the model in terms of error in segmented contours and accuracy of regional clinical scores. |
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Buenos Aires (Argentina) |
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IEEE EMB |
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1557-170X |
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978-1-4244-4123-5 |
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EMBC |
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IAM |
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no |
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IAM @ iam @ GAG2010 |
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1514 |
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Author |
Jaime Moreno; Xavier Otazu; Maria Vanrell |
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Contribution of CIWaM in JPEG2000 Quantization for Color Images |
Type |
Conference Article |
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Year |
2010 |
Publication |
Proceedings of The CREATE 2010 Conference |
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132–136 |
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The aim of this work is to explain how to apply perceptual concepts to define a perceptual pre-quantizer and to improve JPEG2000 compressor. The approach consists in quantizing wavelet transform coefficients using some of the human visual system behavior properties. Noise is fatal to image compression performance, because it can be both annoying for the observer and consumes excessive bandwidth when the imagery is transmitted. Perceptual pre-quantization reduces unperceivable details and thus improve both visual impression and transmission properties. The comparison between JPEG2000 without and with perceptual pre-quantization shows that the latter is not favorable in PSNR, but the recovered image is more compressed at the same or even better visual quality measured with a weighted PSNR. Perceptual criteria were taken from the CIWaM(ChromaticInductionWaveletModel). |
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Gjovik (Norway) |
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CREATE |
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CIC |
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no |
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CAT @ cat @ MOV2010b |
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1308 |
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Author |
Patricia Marquez |
![download PDF file pdf](img/file_PDF.gif)
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Conditions Ensuring Accuracy of Local Optical Flow Schemes |
Type |
Report |
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2010 |
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CVC Tehcnical Report |
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157 |
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Accurate computation of optical flow is a key-point in many image processing fields. Detection of anomalous and unpredicted agents (such as pedestrians, bikers or cars) in urban scenes or pathology discrimination in medical imaging sequences, to mention just a two. The above kinds sequences present two main difficulties for standard optical flow techniques. On one hand, variability in acquisition conditions (illuminance, medical imaging modality, ...) force an alterantive representation for images fulfilling the britghtness constancy constrain. On the hand, current variational schemes produce oversmoothed fields unable to properly model discontinuous behaviours such as collisions or functionless pathological areas. This master project explores the abilities and limitations of local and global optical flow approaches. The master student will put especial emphasis in the theoretical grounds behind in order to design a variational framework combining the theoretical advantages of the considered techniques. In particular an optical flow based on Gabor phase tracking (developed in the group for medical imaging) will be generalized to urban scenes. |
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Master's thesis |
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Bellaterra 08193, Barcelona, Spain |
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IAM; |
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IAM @ iam @ Mar2010 |
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1582 |
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Author |
Francesco Ciompi; Oriol Pujol; E Fernandez-Nofrerias; J. Mauri; Petia Radeva |
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Title ![sorted by Title field, descending order (down)](img/sort_desc.gif) |
Conditional Random Fields for image segmentation in Intravascular Ultrasound |
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Conference Article |
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2010 |
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Medical Image Computing in Catalunya: Graduate Student Workshop |
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13–14 |
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We present a Conditional Random Fields based approach for segmenting Intravascular Ultrasond (IVUS) images. The presented method uses a contextual discriminative graphical model to deal with the presence of distorsions and artifacts in IVUS images, that turns the segmentation of interesting regions into a difficult task. An accurate lumen segmentation on IVUS longitudinal images is achieved. |
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Girona |
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MICCAT |
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MILAB;HUPBA |
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BCNPCL @ bcnpcl @ CPF2010 |
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1453 |
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