Download or read book Repr sentation valuation et utilisation de relations spatiales pour l interpr tation d images written by Olivier Colliot and published by . This book was released on 2003 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les relations spatiales telles que l'adjacence, les distances, les directions ou encore les symétries constituent un élément essentiel des descriptions d'agencement spatial entre les objets d'une scène. Notre travail de thèse est articulé autour des questions suivantes. Comment représenter des relations spatiales ? Comment les utiliser pour formaliser la description d'une scène ? Comment les utiliser à des fins de segmentation et de reconnaissance? Dans un premier temps, nous nous intéressons à un type de relation particulier : les symétries planes, et proposons des méthodes pour quantifier le degré desymétrie dans les objets flous et localiser le plan de symétrie d'un objet. Puis nous montrons comment la description des structures cérébrales peut se faire à l'aide d'un ensemble de relations spatiales. Enfin, une méthode pour intégrer ces relations à un modèle déformable est proposée. Elle est utilisée pour construire une procédure de segmentation des structures cérébrales internes.

Download or read book Relations Spatiales Et Raisonnement Spatial Pour L interpr tation D images D observation de la Terre L aide D un Mod le Structurel written by Maria Carolina Vanegas Orozco and published by . This book was released on 2011 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: High resolution remote sensing images allow discriminating between different objects that compose a scene. However, due to the large quantities of information it is difficult to differentiate the meaningful characteristics or regions necessaries for the description of the scene. Thus, the interpretation of these image requires the introduction of new tools which allows us to distinguish the objects of interest from the rest of the image. First we study the spatial relations which can be useful for the interpretation of satellite images. We focused on the following spatial relations: surround, relations between linear objects and regions, alignment and parallelism. For each of these relations we developed formal models within the fuzzy set framework, which take into account the semantics, the perception and the context of use of these relations. These relations were evaluated on real objects, obtaining satisfaction degrees which fit well with the intuition, even in the case of complex objects.Then we propose an application of spatial relations for higher level tasks. We introduce an interpretation system which is capable of finding the instantiations of an structural model in an image. The interpretation problem is described as a flexible constraint satisfaction problem. We proposed adapted propagation algorithms for flexible constraint satisfaction problems in order to cope with complex relations and to take into account the difficulties of properly detecting the objects in the image. We tested our algorithm in scenes containing harbors and airports and the results show the interest of incorporating this methodology in a more complete image interpretation system.

Download or read book Extraction analyse et utilisation de relations spatiales entre objets d int r t pour une analyse d images de t l d tection guid e par des connaissances du domaine written by Bruno Belarte and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les nouveaux capteurs satellitaires permettent l'acquisition d'images d'un très haut niveau de détail à des cadences élevées, produisant ainsi une importante masse de données. Le traitement manuel de ces données étant devenu impossible, de nouveaux outils sont nécessaires afin de les traiter automatiquement. Des algorithmes de segmentation efficaces sont nécessaires pour extraire des objets d'intérêt de ces images. Cependant les segments produits ne correspondent pas aux objets d'intérêt, rendant difficile l'utilisation de connaissances expertes.Dans le cadre de cette thèse nous proposons de changer le niveau d'interprétation d'une image afin de voir les objets d'intérêt pour l'expert comme des objets composés par des segments. Pour cela, nous avons mis en place un processus d'apprentissage multi-niveaux dans le but d'apprendre ces règles de composition. Une règle de composition ainsi apprise peut ensuite être utilisée pour extraire les objets d'intérêt correspondant. Dans un second temps, nous proposons d'utiliser l'algorithme d'apprentissage de règles de composition comme première étape d'une approche montante-descendante. Cette chaîne de traitement a pour objectif d'améliorer la classification à partir des informations contextuelles et de connaissances expertes. Des objets composés de plus haut niveau sémantique sont extraits à partir de règles apprises ou fournies par l'expert, et cette nouvelle information est utilisée pour mettre à jour la classification des objets aux niveaux inférieurs. L'ensemble de ces travaux ont été testés et validés sur des images Pléiades représentant la ville de Strasbourg. Les résultats obtenus montrent l'efficacité de l'apprentissage de règles de composition pour faire le lien entre connaissance experte et segmentation, ainsi que l'intérêt de l'utilisation d'informations contextuelles dans l'analyse d'images de télédétection à très haute résolution spatiale.

Download or read book Mod lisation et apprentissage de relations spatiales pour la reconnaissance et l interpr tation d images written by Michaël Clément and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ces dernières années, la quantité de données visuelles produites par divers types de capteurs est en augmentation permanente. L'interprétation et l'indexation automatique de telles données constituent des défis importants pour les domaines liés à la reconnaissance de formes et la vision par ordinateur. Dans ce contexte, la position relative des différents objets d'intérêt composant les images représente une information particulièrement importante pour interpréter leur contenu. Les relations spatiales sont en effet porteuses d'une sémantique riche, qui est fortement liée à la perception humaine. Les travaux de recherche présentés dans cette thèse proposent ainsi d'explorer différentes approches génériques de description de l'information spatiale, en vue de les intégrer dans des systèmes de reconnaissance et d'interprétation d'images de haut niveau. Tout d'abord, nous présentons une approche pour la description de configurations spatiales complexes, où les objets peuvent être imbriqués les uns dans les autres. Cette notion est formalisée par deux nouvelles relations spatiales, nommées enlacement et entrelacement. Nous proposons un modèle qui permet de décrire et de visualiser ces configurations avec une granularité directionnelle. Ce modèle est validé expérimentalement pour des applications en imagerie biomédicale, en télédétection et en analyse d'images de documents. Ensuite, nous présentons un cadre d'apprentissage de relations spatiales composites à partir d'ensembles d'images. Inspirée des approches par sacs de caractéristiques visuelles, cette stratégie permet de construire des vocabulaires de configurations spatiales apparaissant dans les images, à différentes échelles. Ces caractéristiques structurelles peuvent notamment être combinées avec des descriptions locales, conduisant ainsi à des représentations hybrides et complémentaires. Les résultats expérimentaux obtenus sur différentes bases d'images structurées permettent d'illustrer l'intérêt de cette approche pour la reconnaissance et la classification d'images.

Download or read book Apprentissage de Donn es Structur es Pour L interpr tation D images written by Emanuel Aldea and published by . This book was released on 2009 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Image interpretation methods use primarily the visual features of low-level or high-level interest elements. However, spatial information concerning the relative positioning of these elements is equally beneficial, as it has been shown previously in segmentation and structure recognition. Fuzzy representations permit to assess at the same time the imprecision degree of a relation and the gradual transition between the satisfiability and the non-satisfiability of a relation. The objective of this work is to explore techniques of spatial information representation and their integration in the learning process, within the context of image classifiers that make use of graph kernels. We motivate our choice of labeled graphs for representing images, in the context of learning with SVM classifiers. Graph kernels have been studied intensively in computational chemistry and biology, but an adaptation for image related graphs is necessary, since image structures and properties of the information encoded in the labeling are fundamentally different. We illustrate the integration of spatial information within the graphical model by considering fuzzy adjacency measures between interest elements, and we define a family of graph representations determined by different thresholds applied to these spatial measures. Finally, we employ multiple kernel learning in order to build up classifiers that can take into account different graphical representations of the same image at once. Results show that spatial information complements the visual features of distinctive elements in images and that adapting the discriminative kernel functions for the fuzzy spatial representations is beneficial in terms of performance.

Download or read book Relations spatiales structurelles et interpr tation d images written by Pascal Matsakis and published by . This book was released on 1998 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book PASCAL written by and published by . This book was released on 1994 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agrindex written by and published by . This book was released on 1993 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies in Regional Science written by Regional Science Association. British Section and published by . This book was released on 1969 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Digital and Social Media Marketing written by Nripendra P. Rana and published by Springer Nature. This book was released on 2019-11-11 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines issues and implications of digital and social media marketing for emerging markets. These markets necessitate substantial adaptations of developed theories and approaches employed in the Western world. The book investigates problems specific to emerging markets, while identifying new theoretical constructs and practical applications of digital marketing. It addresses topics such as electronic word of mouth (eWOM), demographic differences in digital marketing, mobile marketing, search engine advertising, among others. A radical increase in both temporal and geographical reach is empowering consumers to exert influence on brands, products, and services. Information and Communication Technologies (ICTs) and digital media are having a significant impact on the way people communicate and fulfil their socio-economic, emotional and material needs. These technologies are also being harnessed by businesses for various purposes including distribution and selling of goods, retailing of consumer services, customer relationship management, and influencing consumer behaviour by employing digital marketing practices. This book considers this, as it examines the practice and research related to digital and social media marketing.

Download or read book Behavior and Environment written by T. Garling and published by Elsevier. This book was released on 1993-01-28 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Active researchers in the areas of geography and psychology have contributed to this book. Both fields are capable of increasing our scientific knowledge of how human behavior is interfaced with the molar physical environment. Such knowledge is essential for the solution of many of today's most urgent environmental problems. Failure to constrain use of scarce resources, pollution due to human activities, creation of technological hazards and deteriorating urban quality due to vandalism and crime are all well known examples. The influence of psychology in geographical research has long been appreciated but it is only recently that psychologists have recognized they have something to learn from geography. In identifying the importance of two-way interdisciplinary communication, a psychologist and a geographer have been invited to each write a chapter in this book on a designated topic so that close comparisons can be drawn as to how the two disciplines approach the same difficulties. Since the disciplines are to some extent complementary, it is hoped that this close collaboration will have synergistic effects on the attempts of both to find solutions to environmental problems through an increased understanding of the many behavior-environment interfaces.

Download or read book Forging Ahead written by Canada. Industry Canada and published by Gouvernement du Canada. This book was released on 2000 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Federal context, research, university, private sector, decision making process, commercialization of university research, global climate change, international approaches, federal/national approaches, research and development, ecological integrity, statistical indicators.

Download or read book The Cognition of Geographic Space written by Rob Kitchin and published by I.B. Tauris. This book was released on 2002 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This engaging book looks at how humans think and behave in geographic space. The authors analyze what people know about spatial geographical relationships, and how this knowledge is used in everyday life. They synthesize a variety of perspectives from various disciplines, providing a critical appraisal of geographic space. In doing so, the authors put forth new ideas and theories concerning cognitive mapping, and outline an agenda for future research.

Download or read book Guide for the Care and Use of Laboratory Animals written by National Research Council and published by National Academies Press. This book was released on 2011-01-27 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: A respected resource for decades, the Guide for the Care and Use of Laboratory Animals has been updated by a committee of experts, taking into consideration input from the scientific and laboratory animal communities and the public at large. The Guide incorporates new scientific information on common laboratory animals, including aquatic species, and includes extensive references. It is organized around major components of animal use: Key concepts of animal care and use. The Guide sets the framework for the humane care and use of laboratory animals. Animal care and use program. The Guide discusses the concept of a broad Program of Animal Care and Use, including roles and responsibilities of the Institutional Official, Attending Veterinarian and the Institutional Animal Care and Use Committee. Animal environment, husbandry, and management. A chapter on this topic is now divided into sections on terrestrial and aquatic animals and provides recommendations for housing and environment, husbandry, behavioral and population management, and more. Veterinary care. The Guide discusses veterinary care and the responsibilities of the Attending Veterinarian. It includes recommendations on animal procurement and transportation, preventive medicine (including animal biosecurity), and clinical care and management. The Guide addresses distress and pain recognition and relief, and issues surrounding euthanasia. Physical plant. The Guide identifies design issues, providing construction guidelines for functional areas; considerations such as drainage, vibration and noise control, and environmental monitoring; and specialized facilities for animal housing and research needs. The Guide for the Care and Use of Laboratory Animals provides a framework for the judgments required in the management of animal facilities. This updated and expanded resource of proven value will be important to scientists and researchers, veterinarians, animal care personnel, facilities managers, institutional administrators, policy makers involved in research issues, and animal welfare advocates.

Download or read book The Greenhouse Gas Protocol written by and published by World Business Pub.. This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The GHG Protocol Corporate Accounting and Reporting Standard helps companies and other organizations to identify, calculate, and report GHG emissions. It is designed to set the standard for accurate, complete, consistent, relevant and transparent accounting and reporting of GHG emissions.

Download or read book MRI from Picture to Proton written by Donald W. McRobbie and published by Cambridge University Press. This book was released on 2017-04-13 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: MR is a powerful modality. At its most advanced, it can be used not just to image anatomy and pathology, but to investigate organ function, to probe in vivo chemistry, and even to visualise the brain thinking. However, clinicians, technologists and scientists struggle with the study of the subject. The result is sometimes an obscurity of understanding, or a dilution of scientific truth, resulting in misconceptions. This is why MRI from Picture to Proton has achieved its reputation for practical clarity. MR is introduced as a tool, with coverage starting from the images, equipment and scanning protocols and traced back towards the underlying physics theory. With new content on quantitative MRI, MR safety, multi-band excitation, Dixon imaging, MR elastography and advanced pulse sequences, and with additional supportive materials available on the book's website, this new edition is completely revised and updated to reflect the best use of modern MR technology.

Download or read book A Guide to the Preventive Conservation of Photograph Collections written by Bertrand Lavédrine and published by Getty Publications. This book was released on 2003 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: A resource for the photographic conservator, conservation scientist, curator, as well as professional collector, this volume synthesizes both the masses of research that has been completed to date and the international standards that have been established on the subject.