Download or read book Extraction de surfaces dans des images 3D et chemins minimaux written by Roberto Ardon and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extractions de courbes et surfaces par m thodes de chemins minimaux et ensembles de niveaux written by Thomas Deschamps and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans cette these nous nous interessons a l'utilisation des méthodes de chemins minimaux et des méthodes de contours actifs par Ensembles de Niveaux, pour l'extraction de courbes et de surfaces dans des images medicales 3D. Dans un premier temps, nous nous sommes attaches a proposer un éventail varié de techniques d'extraction de chemins minimaux dans des images 2D et 3D, basees sur la résolution de l'équation Eikonal par l'algorithme du Fast Marching. Nous avons montre des resultats de ces techniques appliquees a des problèmes d'imagerie médicale concrets, notamment en construction de trajectoires 3D pour l'endoscopie virtuelle, et en segmentation interactive, avec possibilité d'apprentissage. Dans un deuxieme temps, nous nous sommes interessés a l'extraction de surfaces. Nous avons developpé un algorithme rapide de pré-segmentation, sur la base du formalisme des chemins minimaux. Nous avons étudié en détail la mise en place d'une collaboration entre cette méthode et celle des Ensembles de Niveaux, dont un des avantages communs est de ne pas avoir d'a priori sur la topologie de l'objet a segmenter. Cette méthode collaborative a ensuite ete testée sur des problèmes de segmentation et de visualisation de pathologies telles que les anevrismes cerebraux et les polypes du colon. Dans un troisième temps nous avons fusionné les résultats des deux premières parties pour obtenir l'extraction de surfaces, et des squelettes d'objets anatomiques tubulaires. Les squelettes des surfaces fournissent des trajectoires que nous utilisons pour déplacer des cameras virtuelles, et nous servent a definir les sections des objets lorsque nous voulons mesurer l'étendue d'une pathologie. La dernière partie regroupe des applications de ces méthodes a l'extraction de structures arborescentes. Nous étudions le cas des arbres vasculaires dans des images médicales 3D de produit de contraste, ainsi que le problème plus difficile de l'extraction de l'arbre bronchique sur des images scanners des poumons.
Download or read book Extractions de courbes et surfaces par m thodes de chemins minimaux et ensembles de niveaux applications en imagerie m dicale 3D written by Thomas Deschamps and published by . This book was released on 2001 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans cette these nous nous interessons a l'utilisation des méthodes de chemins minimaux et des méthodes de contours actifs par Ensembles de Niveaux, pour l'extraction de courbes et de surfaces dans des images medicales 3D. Dans un premier temps, nous nous sommes attaches a proposer un éventail varié de techniques d'extraction de chemins minimaux dans des images 2D et 3D, basees sur la résolution de l'équation Eikonal par l'algorithme du Fast Marching. Nous avons montre des resultats de ces techniques appliquees a des problèmes d'imagerie médicale concrets, notamment en construction de trajectoires 3D pour l'endoscopie virtuelle, et en segmentation interactive, avec possibilité d'apprentissage. Dans un deuxieme temps, nous nous sommes interessés a l'extraction de surfaces. Nous avons developpé un algorithme rapide de pré-segmentation, sur la base du formalisme des chemins minimaux. Nous avons étudié en détail la mise en place d'une collaboration entre cette méthode et celle des Ensembles de Niveaux, dont un des avantages communs est de ne pas avoir d'a priori sur la topologie de l'objet a segmenter. Cette méthode collaborative a ensuite ete testée sur des problèmes de segmentation et de visualisation de pathologies telles que les anevrismes cerebraux et les polypes du colon. Dans un troisième temps nous avons fusionné les résultats des deux premières parties pour obtenir l'extraction de surfaces, et des squelettes d'objets anatomiques tubulaires. Les squelettes des surfaces fournissent des trajectoires que nous utilisons pour déplacer des cameras virtuelles, et nous servent a definir les sections des objets lorsque nous voulons mesurer l'étendue d'une pathologie. La dernière partie regroupe des applications de ces méthodes a l'extraction de structures arborescentes. Nous étudions le cas des arbres vasculaires dans des images médicales 3D de produit de contraste, ainsi que le problème plus difficile de l'extraction de l'arbre bronchique sur des images scanners des poumons.
Download or read book Handbook of Biomedical Image Analysis written by David Wilson and published by Springer Science & Business Media. This book was released on 2007-04-25 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our goal is to develop automated methods for the segmentation of thr- dimensional biomedical images. Here, we describe the segmentation of c- focal microscopy images of bee brains (20 individuals) by registration to one or several atlas images. Registration is performed by a highly parallel imp- mentation of an entropy-based nonrigid registration algorithm using B-spline transformations. We present and evaluate different methods to solve the cor- spondence problem in atlas based registration. An image can be segmented by registering it to an individual atlas, an average atlas, or multiple atlases. When registering to multiple atlases, combining the individual segmentations into a ?nalsegmentationcanbeachievedbyatlasselection,ormulticlassi?erdecision fusion. Wedescribeallthesemethodsandevaluatethesegmentationaccuracies that they achieve by performing experiments with electronic phantoms as well as by comparing their outputs to a manual gold standard. The present work is focused on the mathematical and computational t- ory behind a technique for deformable image registration termed Hyperelastic Warping, and demonstration of the technique via applications in image regist- tion and strain measurement. The approach combines well-established prin- ples of nonlinear continuum mechanics with forces derived directly from thr- dimensional image data to achieve registration. The general approach does not require the de?nition of landmarks, ?ducials, or surfaces, although it can - commodate these if available. Representative problems demonstrate the robust and ?exible nature of the approach. Three-dimensional registration methods are introduced for registering MRI volumes of the pelvis and prostate. The chapter ?rst reviews the applications, xi xii Preface challenges, and previous methods of image registration in the prostate.
Download or read book Geodesic Methods in Computer Vision and Graphics written by Gabriel Peyré and published by Now Publishers Inc. This book was released on 2010 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews the emerging field of geodesic methods and features the following: explanations of the mathematical foundations underlying these methods; discussion on the state of the art algorithms to compute shortest paths; review of several fields of application, including medical imaging segmentation, 3-D surface sampling and shape retrieval
Download or read book 3 D Sound for Virtual Reality and Multimedia written by Durand R. Begault and published by . This book was released on 2000 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Arcades Project written by Walter Benjamin and published by Harvard University Press. This book was released on 1999 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on the arcades of 19th-century Paris--glass-roofed rows of shops that were early centers of consumerism--Benjamin presents a montage of quotations from, and reflections on, hundreds of published sources. 46 illustrations.
Download or read book Superhydrophobic Surfaces written by Mehdi Khodaei and published by . This book was released on 2020-07 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Historical Dictionary of the Democratic Republic of the Congo written by Emizet Francois Kisangani and published by Scarecrow Press. This book was released on 2009-10-01 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: The third edition of the Historical Dictionary of the Democratic Republic of the Congo looks back at the nearly 48 years of independence, over a century of colonial rule, and even earlier kingdoms and groups that shared the territory. This is done through a chronology, an introductory essay, a bibliography, and over 800 cross-referenced dictionary entries on civil wars, mutinies, notable people, places, events, and cultural practices.
Download or read book Advances in Airborne Lidar Systems and Data Processing written by and published by . This book was released on 2018-05-11 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects the papers in the special issue "Airborne Laser Scanning" in Remote Sensing (Nov. 2016) and several other selected papers published in the same journal in the past few years. Our intention is to reflect recent technological developments and innovative techniques in this field. The book consists of 23 papers in six subject areas: 1) Single photon and Geiger-mode Lidar, 2) Multispectral lidar, 3) Waveform lidar, 4) Registration of point clouds, 5) Trees and terrain, and 6) Building extraction. The book is a valuable resource for scientists, engineers, developers, instructors, and graduate students interested in lidar systems and data processing.
Download or read book NADCA Product Specification Standards for Die Castings written by Diecasting Development Council (North American Die Casting Association) and published by North Amer Die Casting Assn. This book was released on 1994-01-01 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Artisanal and Small scale Mining written by Thomas Hentschel and published by IIED. This book was released on 2003 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on studies from countries in Africa, South America and Asia, looks at small-scale mining activities which often are both illegal and environmentally damaging, and dangerous for workers and their communities. Gives an overview on the issues and challenges involved, concluding about how sustainable development can be achieved.
Download or read book Lunar Sourcebook written by Grant Heiken and published by CUP Archive. This book was released on 1991-04-26 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only work to date to collect data gathered during the American and Soviet missions in an accessible and complete reference of current scientific and technical information about the Moon.
Download or read book WIPO Technology Trends 2019 Artificial Intelligence written by World Intellectual Property Organization and published by WIPO. This book was released on 2019-01-21 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first report in a new flagship series, WIPO Technology Trends, aims to shed light on the trends in innovation in artificial intelligence since the field first developed in the 1950s.
Download or read book Acoustics of Porous Media written by Thierry Bourbié and published by Editions TECHNIP. This book was released on 1987 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biophysics of Cell Membranes written by Richard M. Epand and published by Springer. This book was released on 2017-09-25 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume focuses on the modulation of biological membranes by specific biophysical properties. The readers are introduced to emerging biophysical approaches that mimick specific states (like membrane lipid asymmetry, membrane curvature, lipid flip-flop, lipid phase separation) that are relevant to the functioning of biological membranes. The first chapter describes innovative methods to mimic the prevailing asymmetry in biological membranes by forming asymmetrical membranes made of monolayers with different compositions. One of the chapters illustrates how physical parameters, like curvature and elasticity, can affect and modulate the interactions between lipids and proteins. This volume also describes the sensitivity of certain ion channels to mechanical forces and it presents an analysis of how cell shape is determined by both the cytoskeleton and the lipid domains in the membrane. The last chapter provides evidence that liposomes can be used as a minimal cellular model to reconstitute processes related to the origin of life. Each topic covered in this volume is presented by leading experts in the field who are able to present clear, authoritative and up-to-date reviews. The novelty of the methods proposed and their potential for a deeper molecular description of membrane functioning are particularly relevant experts in the areas of biochemistry, biophysics and cell biology, while also presenting clear and thorough introductions, making the material suitable for students in these fields as well.
Download or read book Toxicological Profile for Strontium written by and published by . This book was released on 2004 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
