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Etude Dalgorithmes De Classification Contextuelle Et Application A La Segmentation Dimages Satellite
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Book Synopsis Etude d'algorithmes de classification contextuelle et application a la segmentation d'images satellite by : Pascale Masson
Download or read book Etude d'algorithmes de classification contextuelle et application a la segmentation d'images satellite written by Pascale Masson and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Etude d'algorithmes de classification contextuelle et application à la segmentation d'images satellite by : Pascale Masson
Download or read book Etude d'algorithmes de classification contextuelle et application à la segmentation d'images satellite written by Pascale Masson and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude de la thèse traite du problème de la segmentation d'images dans le cadre de l'approche statistique bayesienne de la décision. En vue d'appliquer une des méthodes locales de segmentation bayesiennes (basées sur une observation spatialement limitée) aux images réelles satellite, sans information à priori sur la nature du terrain de la scène observée, on admet un modèle sous-jacent de l'image intégrant une information locale sur la configuration spatiale des exemplaires de nature de terrain (information sur la forme géométrique des régions de terrain homogène) et sur la texture de l'image. Le problème de la segmentation non supervisée se résume alors a l'estimation d'un mélange de lois d'une famille paramétrique donnée. Nous choisissons d'appliquer l'algorithme sem (de celeux et diebolt) à l'estimation de la loi a priori sur le contexte et des caractéristiques de texture. Nous évaluons les performances futures de la méthode de segmentation contextuelle, avec estimation prealable des paramètres du modèle sous-jacent, en étudiant sur des images simulées l'erreur de classification et la qualité de l'estimateur. Nous comparons les performances théoriques et non supervisées de la méthode contextuelle aux performances de la méthode locale bayesienne la plus simple ne prenant en compte aucune information spatiale. Nous mettons en évidence le cas ou l'apport de l'information spatiales est négligeable et le cas ou il sera très important indépendamment du degré de corrélation de l'observation. Nous montrons l'influence sur les performances de différents paramètres, qui diffèrent suivant le cas de discrimination étudié. Nous appliquons les deux méthodes aux images réelles satellite et nous étudions une mesure de fiabilité d'un résultat de classification baseé uniquement sur l'observation (sans apprentissage des classes)
Book Synopsis MODELISATION STOCHASTIQUE ET CLASSIFICATION DES IMAGES SATELLITE PAR DES METHODES STATISTIQUES by : NICOLE.. MARHIC AGUIRRE
Download or read book MODELISATION STOCHASTIQUE ET CLASSIFICATION DES IMAGES SATELLITE PAR DES METHODES STATISTIQUES written by NICOLE.. MARHIC AGUIRRE and published by . This book was released on 1994 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE EST CENTREE SUR L'ETUDE DES PROBLEMES DE MODELISATION ET D'ESTIMATION LIES A LA CLASSIFICATION D'IMAGES SATELLITE PAR DES METHODES STATISTIQUES. ELLE COMPREND DONC UNE PREMIERE PARTIE CONSACREE AU MODELE MARKOVIEN QUI EST LA BASE DU MODELE HIERARCHIQUE ADOPTE POUR LES IMAGES SATELLITE DANS LE CADRE DE LA CLASSIFICATION PAR DES METHODES STATISTIQUES. DANS LA DEUXIEME PARTIE ON PASSE EN REVUE LES PRINCIPALES METHODES DE SEGMENTATION BAYESIENNE ; ON DISTINGUE LES METHODES CONTEXTUELLES, QUI PERMETTENT DE CLASSER UN PIXEL DONNE EN TENANT SEULEMENT COMPTE DES OBSERVATIONS FAITES SUR QUELQUES PIXELS VOISINS, DES METHODES GLOBALES QUI CLASSENT UN PIXEL DE L'IMAGE A PARTIR DE TOUTES LES OBSERVATIONS. QU'ELLE SOIT GLOBALE OU CONTEXTUELLE, UNE METHODE DE SEGMENTATION NECESSITE LA CONNAISSANCE DE CERTAINS DES PARAMETRES CARACTERISANT LE MODELE ; AINSI, POUR MENER A BIEN UNE CLASSIFICATION NON SUPERVISEE, ON DOIT RESOUDRE LE PROBLEME DE L'ESTIMATION DES PARAMETRES UTILES CE QUI REVIENT A SEPARER LES COMPOSANTS D'UN MELANGE DE DISTRIBUTIONS (GAUSSIENNES DANS LE CAS D'IMAGES SPOT). LA PLUS GRANDE PARTIE DE CE TRAVAIL EST CONSACREE A L'ETUDE ET A LA MISE EN UVRE D'ALGORITHMES DE CLASSIFICATION CONTEXTUELLE NON SUPERVISEE. LES PRINCIPALES METHODES D'ESTIMATION A LA BASE DE CES ALGORITHMES SONT CELLES FONDEES SUR LA MAXIMISATION DE LA VRAISEMBLANCE QUI CONDUISENT A DES ALGORITHMES DU TYPE ESTIMATION-MAXIMISATION ET CELLES BASEES SUR LA PROCEDURE ITERATIVE CONDITIONAL ESTIMATION NECESSITANT LE CALCUL ITERATIF DE L'ESPERANCE CONDITIONNELLE D'ESTIMATEURS QUE L'ON PEUT DEFINIR A PARTIR DU MODELE ADOPTE POUR L'IMAGE. APRES AVOIR EVALUE LES PERFORMANCES DES ALGORITHMES CONTEXTUELS AINSI OBTENUS, ON LES COMPARE A CELLES D'UN ALGORITHME, DEJA EXISTANT, DE TYPE EM COMBINE A UNE METHODE GLOBALE DE SEGMENTATION. DANS UN PREMIER TEMPS, AVANT DE TRAITER DES DONNEES REELLES SPOT, ON UTILISE DES IMAGES, SYNTHESE D'IMAGES SPOT, OBTENUES PAR ECHANTILLONNAGE DE CHAMPS MARKOVIENS CARACTERISES PAR UNE DISTRIBUTION DE GIBBS
Book Synopsis Canadian Journal of Electrical and Computer Engineering by :
Download or read book Canadian Journal of Electrical and Computer Engineering written by and published by . This book was released on 1994 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 26th International Symposium on Remote Sensing of Environment by :
Download or read book 26th International Symposium on Remote Sensing of Environment written by and published by . This book was released on 1996 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Segmentation d'images par combinaison adaptative couleur-texture et classification de pixels by : Dhouha Attia
Download or read book Segmentation d'images par combinaison adaptative couleur-texture et classification de pixels written by Dhouha Attia and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: En segmentation d'images, les informations de couleur et de texture sont très utilisées. Le premier apport de cette thèse se situe au niveau de l'utilisation conjointe de ces deux sources d'informations. Nous proposons alors une méthode de combinaison couleur/texture, adaptative et non paramétrique, qui consiste à combiner un (ou plus) gradient couleur et un (ou plus) gradient texture pour ensuite générer un gradient structurel utilisé comme image de potentiel dans l'algorithme de croissance de régions par LPE. L'originalité de notre méthode réside dans l'étude de la dispersion d'un nuage de point 3D dans l'espace, en utilisant une étude comparative des valeurs propres obtenues par une analyse des composantes principales de la matrice de covariance de ce nuage de points. L'approche de combinaison couleur/texture proposée est d'abord testée sur deux bases d'images, à savoir la base générique d'images couleur de BERKELEY et la base d'images de texture VISTEX. Cette thèse s'inscrivant dans le cadre des projets ViLoc (RFC) et CAPLOC (PREDIT), le deuxième apport de celle-ci se situe au niveau de la caractérisation de l'environnement de réception des signaux GNSS pour améliorer le calcul de la position d'un mobile en milieu urbain. Dans ce cadre, nous proposons d'exclure certains satellites (NLOS dont les signaux sont reçus par réflexion voir totalement bloqués par les obstacles environnants) dans le calcul de la position d'un mobile. Deux approches de caractérisation, basées sur le traitement d'images, sont alors proposées. La première approche consiste à appliquer la méthode de combinaison couleur/texture proposée sur deux bases d'images réelles acquises en mobilité, à l'aide d'une caméra fisheye installée sur le toit du véhicule de laboratoire, suivie d'une classification binaire permettant d'obtenir les deux classes d'intérêt « ciel » (signaux LOS) et « non ciel » (signaux NLOS). Afin de satisfaire la contrainte temps réel exigée par le projet CAPLOC, nous avons proposé une deuxième approche basée sur une simplification de l'image couplée à une classification pixellaire adaptée. Le principe d'exclusion des satellites NLOS permet d'améliorer la précision de la position estimée, mais uniquement lorsque les satellites LOS (dont les signaux sont reçus de manière direct) sont géométriquement bien distribués dans l'espace. Dans le but de prendre en compte cette connaissance relative à la distribution des satellites, et par conséquent, améliorer la précision de localisation, nous avons proposé une nouvelle stratégie pour l'estimation de position, basée sur l'exclusion des satellites NLOS (identifiés par le traitement d'images), conditionnée par l'information DOP, contenue dans les trames GPS.
Book Synopsis Proceedings for the ... International Symposium on Remote Sensing of Environment, the ... Symposium of the Canadian Remote Sensing Society by :
Download or read book Proceedings for the ... International Symposium on Remote Sensing of Environment, the ... Symposium of the Canadian Remote Sensing Society written by and published by . This book was released on with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation with Applications to Tracking and Navigation by : Yaakov Bar-Shalom
Download or read book Estimation with Applications to Tracking and Navigation written by Yaakov Bar-Shalom and published by John Wiley & Sons. This book was released on 2004-04-05 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expert coverage of the design and implementation of state estimation algorithms for tracking and navigation Estimation with Applications to Tracking and Navigation treats the estimation of various quantities from inherently inaccurate remote observations. It explains state estimator design using a balanced combination of linear systems, probability, and statistics. The authors provide a review of the necessary background mathematical techniques and offer an overview of the basic concepts in estimation. They then provide detailed treatments of all the major issues in estimation with a focus on applying these techniques to real systems. Other features include: * Problems that apply theoretical material to real-world applications * In-depth coverage of the Interacting Multiple Model (IMM) estimator * Companion DynaEst(TM) software for MATLAB(TM) implementation of Kalman filters and IMM estimators * Design guidelines for tracking filters Suitable for graduate engineering students and engineers working in remote sensors and tracking, Estimation with Applications to Tracking and Navigation provides expert coverage of this important area.
Download or read book MTI Radar written by D. Curtis Schleher and published by Artech House Publishers. This book was released on 1978 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CIKM'13 by : CIKM 13 Conference Committee
Download or read book CIKM'13 written by CIKM 13 Conference Committee and published by . This book was released on 2013-10-27 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt: CIKM'13: 22nd ACM International Conference on Information and Knowledge Management Oct 27, 2013-Nov 01, 2013 San Francisco, USA. You can view more information about this proceeding and all of ACM�s other published conference proceedings from the ACM Digital Library: http://www.acm.org/dl.
Book Synopsis Streaming Media Architectures, Techniques, and Applications: Recent Advances by : Zhu, Ce
Download or read book Streaming Media Architectures, Techniques, and Applications: Recent Advances written by Zhu, Ce and published by IGI Global. This book was released on 2010-09-30 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book spans a number of interdependent and emerging topics in streaming media, offering a comprehensive collection of topics including media coding, wireless/mobile video, P2P media streaming, and applications of streaming media"--Provided by publisher.
Book Synopsis Ultra Wide Band Antennas by : Xavier Begaud
Download or read book Ultra Wide Band Antennas written by Xavier Begaud and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra Wide Band Technology (UWB) has reached a level of maturity that allows us to offer wireless links with either high or low data rates. These wireless links are frequently associated with a location capability for which ultimate accuracy varies with the inverse of the frequency bandwidth. Using time or frequency domain waveforms, they are currently the subject of international standards facilitating their commercial implementation. Drawing up a complete state of the art, Ultra Wide Band Antennas is aimed at students, engineers and researchers and presents a summary of internationally recognized studies.
Download or read book MIMO written by Alain Sibille and published by Academic Press. This book was released on 2010-12-03 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foreword from Arogyaswami Paulraj, Professor (Emeritus), Stanford University (USA) The first book to show how MIMO principles can be implemented in today’s mobile broadband networks and components Explains and solves some of the practical difficulties that arise in designing and implementing MIMO systems Both theory and implementation sections are written in the context of the most recent standards: IEEE 802.11n (WiFi); IEEE 802.16 (WIMAX); 4G networks (3GPP/3GPP2, LTE)
Author :Jean Goubault-Larrecq Publisher :Springer Science & Business Media ISBN 13 :9781402003684 Total Pages :448 pages Book Rating :4.0/5 (36 download)
Book Synopsis Proof Theory and Automated Deduction by : Jean Goubault-Larrecq
Download or read book Proof Theory and Automated Deduction written by Jean Goubault-Larrecq and published by Springer Science & Business Media. This book was released on 2001-11-30 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in computer applications has led to a new attitude to applied logic in which researchers tailor a logic in the same way they define a computer language. In response to this attitude, this text for undergraduate and graduate students discusses major algorithmic methodologies, and tableaux and resolution methods. The authors focus on first-order logic, the use of proof theory, and the computer application of automated searches for proofs of mathematical propositions. Annotation copyrighted by Book News, Inc., Portland, OR
Book Synopsis Pervasive Mobile and Ambient Wireless Communications by : Roberto Verdone
Download or read book Pervasive Mobile and Ambient Wireless Communications written by Roberto Verdone and published by Springer Science & Business Media. This book was released on 2012-01-02 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reporting the findings of COST 2100, a major European intergovernmental project, this volume offers system designers a good source of guidelines based on channel characterization and measurement-based modeling, as well as worthwhile ideas for future research.
Book Synopsis Applied Signal Processing by : Thierry Dutoit
Download or read book Applied Signal Processing written by Thierry Dutoit and published by Springer Science & Business Media. This book was released on 2010-06-10 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applied Signal Processing: A MATLAB-Based Proof of Concept benefits readers by including the teaching background of experts in various applied signal processing fields and presenting them in a project-oriented framework. Unlike many other MATLAB-based textbooks which only use MATLAB to illustrate theoretical aspects, this book provides fully commented MATLAB code for working proofs-of-concept. The MATLAB code provided on the accompanying online files is the very heart of the material. In addition each chapter offers a functional introduction to the theory required to understand the code as well as a formatted presentation of the contents and outputs of the MATLAB code. Each chapter exposes how digital signal processing is applied for solving a real engineering problem used in a consumer product. The chapters are organized with a description of the problem in its applicative context and a functional review of the theory related to its solution appearing first. Equations are only used for a precise description of the problem and its final solutions. Then a step-by-step MATLAB-based proof of concept, with full code, graphs, and comments follows. The solutions are simple enough for readers with general signal processing background to understand and they use state-of-the-art signal processing principles. Applied Signal Processing: A MATLAB-Based Proof of Concept is an ideal companion for most signal processing course books. It can be used for preparing student labs and projects.
Book Synopsis Multimodal Corpora by : Michael Kipp
Download or read book Multimodal Corpora written by Michael Kipp and published by Springer Science & Business Media. This book was released on 2009-09-23 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the International Workshop on "Multimodal Corpora: From Models of Natural Interaction to Systems and Applications", this expanded collection presents a comprehensive review of the current research in the field.
