Download or read book ESTIMATION DE MOUVEMENT ET RECONSTRUCTION TRIDIMENSIONNELLES ET STEREOVISION written by SU.. RUAN and published by . This book was released on 1993 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA RADIOLOGIE NUMERIQUE PAR SOUSTRACTION PERMET DE VISUALISER DE PROJECTION CONIQUE LES STRUCTURES VASCULAIRES SOUS DES INCIDENCES EN NOMBRE LIMITE. L'ACCES A L'INFORMATION TRIDIMENSIONNELLE RESTE L'ENJEU PRINCIPAL DE CETTE MODALITE D'IMAGE. LE TRAVAIL PRESENTE ICI APPORTE UNE SOLUTION A LA RECONSTRUCTION DU RESEAU ARTERIEL CARDIAQUE EN EXPLOITANT SON MOUVEMENT DANS UNE SEQUENCE D'IMAGES BI-PLAN. LA DEMARCHE PROPOSEE EST SEPAREE EN QUATRE PHASES: LA DETECTION DES PRINCIPAUX VAISSEAUX, L'EXTRACTION DU MOUVEMENT 2D DANS L'IMAGE, LA RECONSTRUCTION DU MOUVEMENT 3D ET DES CORONAIRES, LA CARACTERISATION DE LEUR DYNAMIQUE. L'ETAPE DE DETECTION EST FONDAMENTALE POUR LA SUITE DU PROCESSUS. DIFFERENTES APPROCHES (FILTRAGE ADAPTE, MORPHOLOGIE MATHEMATIQUE) SONT ETUDIEES POUR L'EXTRACTION DES LIGNES CENTRALES DES VAISSEAUX, REPRESENTANT LA PRIMITIVE DE BASE. DEUX METHODES D'ESTIMATION DU MOUVEMENT 2D SONT ENSUITE PROPOSEES: L'UNE BASEE SUR LE FLOT OPTIQUE, L'AUTRE SUR LE SUIVI DE POINTS. LA RECONSTRUCTION DU MOUVEMENT 3D REPOSE SUR L'APPARIEMENT DES BRANCHES EN GEOMETRIE EPIPOLAIRE. UNE RECONSTRUCTION 3D A PARTIR D'UNE PAIRE D'IMAGES SERT D'INITIALIATION, LA PROCEDURE PERMETTANT ENSUITE DE TRAITER TOUTE LA SEQUENCE TEMPORELLE. UNE CARACTERISATION QUANTITATIVE DES CINETIQUES DES BRANCHES QUI PRESENTE UNE EBAUCHE DE L'INTERPRETATION DU MOUVEMENT EST FINALEMENT DECRITE. L'ENSEMBLE DE LA DEMARCHE EST VALIDEE SUR DONNEES REELLES ET SUR DONNEES SIMULEES OBTENUES PAR APPROXIMATION VOLUMIQUE ET REPROJECTION FONCTIONNELLE AVEC DES DONNEES MORPHOLOGIQUES

Download or read book Reconstruction de surface 3D et estimation du mouvement rigide 3D partir d un syst me de st r ovision active written by Sanghyuk Woo and published by . This book was released on 2003 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Robotics VIII written by Bruno Siciliano and published by Springer Science & Business Media. This book was released on 2003-01-21 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of papers on the state of the art in experimental robotics. Experimental Robotics is at the core of validating robotics research for both its systems science and theoretical foundations. Because robotics experiments are carried out on physical, complex machines, of which its controllers are subject to uncertainty, devising meaningful experiments and collecting statistically significant results, pose important and unique challenges in robotics. Robotics experiments serve as a unifying theme for robotics system science and algorithmic foundations. These observations have led to the creation of the International Symposia on Experimental Robotics. The papers in this book were presented at the 2002 International Symposium on Experimental Robotics.

Download or read book St r ovision axiale written by Vincent Rodin and published by . This book was released on 1993 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE PRESENTE UNE ETUDE SUR LA STEREOVISION AXIALE QUI PERMET DE RETROUVER L'INFORMATION TRIDIMENSIONNELLE, A PARTIR D'UNE SEULE CAMERA, GRACE A UN MOUVEMENT DU CENTRE OPTIQUE LE LONG DE L'AXE OPTIQUE. UN TEL SYSTEME EST GENERALEMENT SIMULE PAR UNE CAMERA SOIT MUNIE D'UN ZOOM, SOIT SE DEPLACANT SUR SON AXE PHYSIQUE. NOUS ETUDIONS D'UNE PART LE CALIBRAGE D'UN SYSTEME DE STEREOVISION AXIALE. RESULTATS DE CALIBRAGE A L'APPUI, NOUS MONTRONS QU'UN SYSTEME PHYSIQUEMENT AXIAL N'EXISTE GENERALEMENT PAS. NOUS MONTRONS EGALEMENT QU'IL EST TOUJOURS POSSIBLE DE TRANSFORMER PAR RECTIFICATION GEOMETRIQUE, UN SYSTEME PRESQUE AXIAL EN UN SYSTEME AXIAL. NOUS PRESENTONS D'AUTRE PART UN ALGORITHME D'APPARIEMENT BASE SUR L'ETUDE DES PROFILS D'INTENSITE EXTRAITS LE LONG DE DROITES EPIPOLAIRES. LES POINTS MIS EN CORRESPONDANCE RENDENT POSSIBLE LA RECONSTRUCTION D'OBJETS NON POLYEDRIQUES. DES RECONSTRUCTIONS D'OBJETS NATURELS SONT PRESENTEES. CETTE ETUDE A ABOUTI A LA REALISATION D'UN CAPTEUR SPECIALISE QUI DOIT ETRE UTILISE DANS LE DOMAINE DE L'ENDOSCOPIE OPERATOIRE

Download or read book Planification et automatisation d une reconstruction 3D par st r ovision written by Abdelkrim Belhaoua and published by . This book was released on 2011 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'automatisation de la numérisation est une étape indispensable au développement de la mesure tridimensionnelle dans différents domaines d'applications, comme par exemple l'évaluation d'objets manufacturés. Le but de ce travail de thèse est d'évaluer la conformité d'objets 3D manufacturés en tenant compte des tolérances géométriques et des incertitudes liées à différentes sources d'erreur. La reconstruction 3D est réalisée à partir d'un capteur stéréoscopique. La qualité de la reconstruction 3D peut être affectée de manière significative par les propriétés d'illumination. Par conséquent, la détermination de paramètres favorables d'illumination est un problème crucial que nous tentons de résoudre en optimisant le placement des sources d'illumination. La quantification des erreurs 3D de mesure fait aussi l'objet de cette thèse. L'estimation des erreurs 3D nous permet d'évaluer la qualité de reconstruction 3D et par conséquent d'augmenter les performances de notre système de mesure 3D. Un système d'évaluation dimensionnelle a été développé dans notre laboratoire. Ce système est composé de deux modules : le premier utilise les graphes de situations qui permettent l'automatisation et la gestion des différentes procédures de la reconstruction 3D. Le deuxième module, appelé HTP (Hierarchical Task Plan) se charge du contrôle de la séquence d'acquisitions ainsi que de la reconstruction 3D complète de l'objet et de son évaluation dimensionnelle. Tous les algorithmes développés ont été validés et intégrés dans ce système entièrement opérationnel, y compris un mécanisme de replanification dynamique permettant de s'adapter automatiquement aux conditions réelles d'acquisition.

Download or read book CONSTRUCTION DE MODELES 3D A PARTIR D UNE CAMERA MOBILE written by FREDERIC.. OGOR and published by . This book was released on 1994 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE EST CONSACREE A LA RECONSTRUCTION TRIDIMENSIONNELLE DE SCENES A PARTIR D'UNE CAMERA MOBILE DONT LE MOUVEMENT EST INCONNU. APRES UN RAPPEL DES PRINCIPES ET DES EQUATIONS DE LA RECONSTRUCTION BASES SUR LA TRIANGULATION, NOTRE SYSTEME COMPLET EST INTRODUIT ET SA PRESENTATION DETAILLEE EST DECOMPOSEE EN DEUX PARTIES: LA PREMIERE PARTIE CORRESPOND AU TRAITEMENT DE LA PREMIERE PAIRE D'IMAGES. LA REVUE BIBLIOGRAPHIQUE DE L'ESTIMATION DE MOUVEMENT 3D A PARTIR DE LA CORRESPONDANCE DE POINTS 2D NOUS PERMET DE DEFINIR TROIS MODELES UTILISANT DIFFERENTES HYPOTHESES SIMPLIFICATRICES. LA METHODE D'ESTIMATION DES PARAMETRES DU MOUVEMENT 3D RETENUE EST ENSUITE DETAILLEE. A CE STADE DE LA PREMIERE PARTIE, LA RECONSTRUCTION 3D DE LA SCENE OBSERVEE ENTRE LES DEUX PREMIERS POINTS DE VUE EST EFFECTUEE ET REPRESENTEE SOUS LA FORME DE CARTE DENSE DE PROFONDEUR A L'AIDE DU FLOT OPTIQUE. LA DEUXIEME PARTIE DE CE MEMOIRE CORRESPOND AU TRAITEMENT DES IMAGES SUIVANTES DE LA SEQUENCE. COMME IL EXISTE MAINTENANT UNE PREMIERE INFORMATION 3D DE LA SCENE, LA POSITION DE LA CAMERA APRES CHACUN DE SES DEPLACEMENTS EST ESTIMEE EN UTILISANT UNE MISE EN CORRESPONDANCE 2D-3D SIMPLIFIEE PAR LA CONNAISSANCE DU FLOT OPTIQUE. UNE CARTE DENSE DE PROFONDEUR EST DETERMINEE A L'AIDE DU FLOT OPTIQUE ET DES PARAMETRES DE POSITION 3D POUR CHAQUE POINT DE VUE DE LA CAMERA. LES CARTES DE PROFONDEUR SUCCESSIVES SONT FILTREES PAR L'APPLICATION D'UN FILTRE DE KALMAN. CES DIFFERENTES CARTES DE PROFONDEUR FILTREES SONT FINALEMENT UTILISEES DANS UNE PROCEDURE DE FACETTISATION AFIN DE REPRESENTER LA SCENE SOUS LA FORME D'UN MODELE A FACETTES. POUR CHACUNE DES PARTIES DEFINISSANT NOTRE SYSTEME, DES RESULTATS ISSUS DE TRAITEMENTS SUR DES IMAGES SYNTHETIQUES ET REELLES SONT PRESENTES

Download or read book Estimation des jonctions du mouvement apparent et du relief en vue d une reconstruction 3D de la sc ne written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Image Processing for Broadcast and Video Production written by Yakup Paker and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments in computer visualisation mean that it is now possible to combine computer-generated image sequences with real video, in real time, for broadcast quality production. This will not only revolutionise the broadcast industry, by making "electronic film sets" possible for example, but also has important implications for related fields such as virtual reality, multi-media, industrial vision, and medical image processing. This volume contains papers from the European Workshop on Combined Real and Synthetic Image Processing for Broadcast and Video Production, held in Hamburg, 23-24 November 1994. The papers cover three main aspects of research: hardware, image analysis, and image synthesis, and include several key contributions from the EU RACE II supported MONA LISA (MOdelling NAturaL Images for Synthesis and Animation) project. The resulting volume gives a comprehensive overview of this important area of research, and will be of interest to practitioners, researchers, and postgraduate students.

Download or read book Critical Reviews in Biomedical Engineering written by and published by . This book was released on 1994 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book WITS 2020 written by Saad Bennani and published by Springer Nature. This book was released on 2021-07-21 with total page 1139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents peer-reviewed articles from the 6th International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS 2020), held at Fez, Morocco. It presents original research results, new ideas and practical lessons learnt that touch on all aspects of wireless technologies, embedded and intelligent systems. WITS is an international conference that serves researchers, scholars, professionals, students and academicians looking to foster both working relationships and gain access to the latest research results. Topics covered include Telecoms & Wireless Networking Electronics & Multimedia Embedded & Intelligent Systems Renewable Energies.

Download or read book Computer Vision Analysis of Image Motion by Variational Methods written by Amar Mitiche and published by Springer Science & Business Media. This book was released on 2013-09-05 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a unified view of image motion analysis under the variational framework. Variational methods, rooted in physics and mechanics, but appearing in many other domains, such as statistics, control, and computer vision, address a problem from an optimization standpoint, i.e., they formulate it as the optimization of an objective function or functional. The methods of image motion analysis described in this book use the calculus of variations to minimize (or maximize) an objective functional which transcribes all of the constraints that characterize the desired motion variables. The book addresses the four core subjects of motion analysis: Motion estimation, detection, tracking, and three-dimensional interpretation. Each topic is covered in a dedicated chapter. The presentation is prefaced by an introductory chapter which discusses the purpose of motion analysis. Further, a chapter is included which gives the basic tools and formulae related to curvature, Euler Lagrange equations, unconstrained descent optimization, and level sets, that the variational image motion processing methods use repeatedly in the book.

Download or read book Comptes Rendus written by and published by . This book was released on 1999 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Image Processing and Analysis with Graphs written by Olivier Lezoray and published by CRC Press. This book was released on 2017-07-12 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the theoretical aspects of image processing and analysis through the use of graphs in the representation and analysis of objects, Image Processing and Analysis with Graphs: Theory and Practice also demonstrates how these concepts are indispensible for the design of cutting-edge solutions for real-world applications. Explores new applications in computational photography, image and video processing, computer graphics, recognition, medical and biomedical imaging With the explosive growth in image production, in everything from digital photographs to medical scans, there has been a drastic increase in the number of applications based on digital images. This book explores how graphs—which are suitable to represent any discrete data by modeling neighborhood relationships—have emerged as the perfect unified tool to represent, process, and analyze images. It also explains why graphs are ideal for defining graph-theoretical algorithms that enable the processing of functions, making it possible to draw on the rich literature of combinatorial optimization to produce highly efficient solutions. Some key subjects covered in the book include: Definition of graph-theoretical algorithms that enable denoising and image enhancement Energy minimization and modeling of pixel-labeling problems with graph cuts and Markov Random Fields Image processing with graphs: targeted segmentation, partial differential equations, mathematical morphology, and wavelets Analysis of the similarity between objects with graph matching Adaptation and use of graph-theoretical algorithms for specific imaging applications in computational photography, computer vision, and medical and biomedical imaging Use of graphs has become very influential in computer science and has led to many applications in denoising, enhancement, restoration, and object extraction. Accounting for the wide variety of problems being solved with graphs in image processing and computer vision, this book is a contributed volume of chapters written by renowned experts who address specific techniques or applications. This state-of-the-art overview provides application examples that illustrate practical application of theoretical algorithms. Useful as a support for graduate courses in image processing and computer vision, it is also perfect as a reference for practicing engineers working on development and implementation of image processing and analysis algorithms.

Download or read book Motion Understanding written by W. Bach and published by Springer Science & Business Media. This book was released on 1988-02-29 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physical processes which initiate and maintain motion have been a major concern of serious investigation throughout the evolution of scientific thought. As early as the fifth century B. C. questions regarding motion were presented as touchstones for the most fundamental concepts about existence. Such wide ranging philosophical issues are beyond the scope of this book, however, consider the paradox of the flying arrow attri buted to Zeno of Elea: An arrow is shot from point A to point B requiring a sequence of time instants to traverse the distance. Now, for any time instant, T, of the sequence the arrow is at a position, Pi' and at Ti+! the i arrow is at Pi+i> with Pi ::I-P+• Clearly, each Ti must be a singular time i 1 unit at which the arrow is at rest at Pi because if the arrow were moving during Ti there would be a further sequence, Til' of time instants required for the arrow to traverse the smaller distance. Now, regardless of the level to which this recursive argument is applied, one is left with the flight of the arrow comprising a sequence of positions at which the arrow is at rest. The original intent of presenting this paradox has been interpreted to be as an argument against the possibility of individuated objects moving in space.

Download or read book Computer Vision and Robotics written by John X. Liu and published by Nova Publishers. This book was released on 2006 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with control and learning in robotic systems and computers.

Download or read book Geometric Level Set Methods in Imaging Vision and Graphics written by Stanley Osher and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here is, for the first time, a book that clearly explains and applies new level set methods to problems and applications in computer vision, graphics, and imaging. It is an essential compilation of survey chapters from the leading researchers in the field. The applications of the methods are emphasized.

Download or read book Advances in Hydroinformatics written by Philippe Gourbesville and published by Springer. This book was released on 2018-02-26 with total page 1205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers a collection of extended papers based on presentations given during the SimHydro 2017 conference, held in Sophia Antipolis, Nice, France on June 14–16, 2017. It focuses on how to choose the right model in applied hydraulics and considers various aspects, including the modeling and simulation of fast hydraulic transients, 3D modeling, uncertainties and multiphase flows. The book explores both limitations and performance of current models and presents the latest developments in new numerical schemes, high-performance computing, multiphysics and multiscale methods, and better interaction with field or scale model data. It gathers the lastest theoretical and innovative developments in the modeling field and presents some of the most advance applications on various water related topics like uncertainties, flood simulation and complex hydraulic applications. Given its breadth of coverage, it addresses the needs and interests of practitioners, stakeholders, researchers and engineers alike.