Reseaux de neurones, textures et modeles markoviens pour la detection et l'identification d'objets en mouvement PDF Download
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Author: Souad Haddadi
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Book Description
Author: Souad Haddadi
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
Get Book Here
Book Description
Author: Souad Haddadi
Publisher:
ISBN:
Category :
Languages : fr
Pages : 172
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Book Description
Cette thèse, propose le développement d'une méthode d'analyse de séquence d'images pour l'interprétation de scènes dynamiques où évoluent des objets quelconques ou des êtres humains, sur fond non uniforme et sous éclairage peu contrôlé. Deux axes de recherche ont été abordés : l'analyse de mouvement (détection des objets en mouvement) et la reconnaissance des formes (identification des objets). L'approche de détection proposée s'appuie sur une procédure de segmentation statistique fondée sur le principe markovien et sur l'analyse de la texture. En considérant un opérateur fondé sur les différences entre trois images successives prises deux à deux, on met en évidence les objets mobiles ainsi que les régions du fond découvertes ou recouvertes par ces objets pendant leur mouvement. Une segmentation grossière est ensuite appliquée afin de ne traiter que les zones retenues de l'image. On enchaîne par une segmentation plus fine fondée sur le principe markovien et textural en rapprochant ce problème à celui d'une classification de l'image en pixel fixe et pixel mobile. L'approche d'identification de ces objets utilise un modèle statistique par les réseaux de neurones artificiels. Ils permettent ainsi l'apprentissage numérique par l'exemple. Des modèles d'architectures de réseaux de neurones ont été développés et appliqués à l'identification des êtres humains. Les performances de ces réseaux ont été calculées à l'aide de deux bases de données construites à cette occasion. Nous avons montré que l'on pouvait obtenir de bonnes performances à l'aide de réseaux du type MLP pour notre application. Toutefois, les études menées au cours de cette thèse soulèvent un certain nombre de problèmes théoriques difficiles, ainsi par exemple, à plusieurs reprises, nous nous sommes trouvés confrontés aux problèmes de la sélection d'un ensemble d'apprentissage pertinent.
Author: Vladimir I︠A︡kovlevich Katkovnik
Publisher: SPIE-International Society for Optical Engineering
ISBN:
Category : Computers
Languages : en
Pages : 584
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Book Description
This book deals with a wide class of novel and efficient adaptive signal processing techniques developed to restore signals from noisy and degraded observations. These signals include those acquired from still or video cameras, electron microscopes, radar, X-rays, or ultrasound devices, and are used for various purposes, including entertainment, medical, business, industrial, military, civil, security, and scientific. In many cases useful information and high quality must be extracted from the imaging. However, often raw signals are not directly suitable for this purpose and must be processed in some way. Such processing is called signal reconstruction. This book is devoted to a recent and original approach to signal reconstruction based on combining two independent ideas: local polynomial approximation and the intersection of confidence interval rule.
Author: Max Giordano
Publisher: John Wiley & Sons
ISBN: 1118587529
Category : Business & Economics
Languages : en
Pages : 389
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Book Description
This book gives a comprehensive view of the most recent major international research in the field of tolerancing, and is an excellent resource for anyone interested in Computer Aided Tolerating. It is organized into 4 parts. Part 1 focuses on the more general problems of tolerance analysis and synthesis, for tolerancing in mechanical design and manufacturing processes. Part 2 specifically highlights the simulation of assembly with defects, and the influence of tolerances on the quality of the assembly. Part 3 deals with measurement aspects, and quality control throughout the life cycle. Different measurement technologies and methods for estimating uncertainty are considered. In Part 4, different aspects of tolerancing and their interactions are explored, from the definition of functional requirement to measurement processes in a PLM approach.
Author: Itzhak Benenson
Publisher: John Wiley & Sons
ISBN: 9780470843499
Category : Science
Languages : en
Pages : 320
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Book Description
Geosimulation is hailed as ‘the next big thing’ in geographic modelling for urban studies. This book presents readers with an overview of this new and innovative field by introducing the spatial modelling environment and describing the latest research and development using cellular automata and multi-agent systems. Extensive case studies and working code is available from an associated website which demonstrate the technicalities of geosimulation, and provide readers with the tools to carry out their own modelling and testing. The first book to treat urban geosimulation explicitly, integrating socio-economic and environmental modelling approaches Provides the reader with a sound theoretical base in the science of geosimulation as well as applied material on the construction of geosimulation models Cross-references to an author-maintained associated website with downloadable working code for readers to apply the models presented in the book Visit the Author's Website for further information on Geosimulation, Geographic Automata Systems and Geographic Automata Software http://www.geosimulationbook.com
Author: Simon Denny
Publisher:
ISBN: 9788867490714
Category : Art
Languages : en
Pages : 0
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Book Description
"Simon Denny's new body of work for Portikus ranks among the most ambitious the artist has developed to date. Over the period of one year, the artist researched and developed an intricate project that has grown to considerable dimensions -- both physically and in terms of its critical content. For two months, the monumental gallery space is turned into an homage to technology, communication, and the relentless need for innovation. Simon Denny has produced an embracing and multi-faceted installation that functions as a documentary of the South Korean technology giant Samsung and its global success story. The exhibition's title, "New Management", refers to the legendary management philosophy that Lee Kun-hee, Chairman of the Samsung Group, infamously introduced in the early nineties."--Publisher's website.
Author: World Bank
Publisher: World Bank Publications
ISBN: 0821385631
Category : Social Science
Languages : en
Pages : 114
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Book Description
This report provides the most comprehensive and rigorous analysis of Iraqi income and expenditure in several decades. The report makes extensive use of the Iraq Household Socio-Economic Survey, the first nationwide income and expenditure survey since 1988. IHSES data is complemented income and expenditure data from a wide range of other measures of living standards, allowing us to analyze living standards in a holistic way. The analysis presented here was performed with two main goals first, to inform the Government s Poverty Reduction Strategy; and second, to serve as a baseline for future assessments of changes in living standards and the identification of critical issues for deeper examination. Iraqi living standards have two unusual characteristics. First, they have fallen over the past generation. Second, they feature surprisingly little inequality. These characteristics are both rooted in Iraq s recent history of authoritarian government, war, military occupation, insurgency, and civil strife leading to infrastructure destruction and population displacement. There have been few opportunities for individuals to prosper from professional or entrepreneurial activities. Decades of neglected investment have resulted in deterioration of social services and economic infrastructure. Consequently, individuals have lacked capabilities to prosper and an investment climate conducive to prosperity. School enrollment and life expectancy have declined. Extremely low returns to education reflect the combination of poor educational quality and lack of employment opportunities. In terms of economic infrastructure, access to reliable electricity and water, and even access to paved roads are low, are further reflections of decades of neglect. While the upper end of the distribution has been pulled down by a lack of opportunities, the lower end has been supported by direct government provision of food. The Public Distribution System (PDS) provides 85 percent of food needs. While PDS has been useful as a safety net for the poor and the vulnerable, the system is expensive, inefficient, and fiscally risky. Indeed, PDS food rations account for a far greater share of public spending than does education or health. Going forward, Iraq faces two main challenges. First, although Iraq does not have to develop from scratch, it faces a formidable challenge in re-development. Second, a shift by the Government is required from direct provision of basic subsistence toward investment in human capacities. The Government can provide an enabling environment through investments in economic infrastructure and services to business and citizens, thus allowing the population to make productive use of education and their own labor. Both challenges are now being taken up by the Poverty Reduction Strategy, which articulates a detailed set of required actions and outlines priorities for government spending.
Author: Catherine Malabou
Publisher: SUNY Press
ISBN: 1438439555
Category : Philosophy
Languages : en
Pages : 373
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Book Description
Elaborates the author’s conception of plasticity by proposing a new way of thinking through Heidegger’s writings on change.
Author: Heribert Picht
Publisher: Peter Lang
ISBN: 9783039111565
Category : Foreign Language Study
Languages : en
Pages : 444
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Book Description
This volume comprises contributions originally presented at the 15th European Symposium on Languages for Special Purposes held at the University of Bergamo on 29 August - 2 September 2005. The volume is divided into four parts: Approaches to Terminological Theories; Terms in Discourse; Knowledge Elicitation, Ordering and Management; Term extraction and terminographical work. The research presented in the various contributions to this volume clearly indicates that terminology as an inter- and transdisciplinary field of knowledge is firmly developing its theoretical foundations and practical applications in accordance with and within the framework of its overall goal: to ensure and to augment the quality of communication with professional content.
Author: Christine Parent
Publisher: Springer Science & Business Media
ISBN: 354030326X
Category : Computers
Languages : en
Pages : 475
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Book Description
From environmental management to land planning and geo-marketing, the number of application domains that may greatly benefit from using data enriched with spatio-temporal features is expanding very rapidly. This book shows that a conceptual design approach for spatio-temporal databases is both feasible and easy to apprehend. While providing a firm basis through extensive discussion of traditional data modeling concepts, the major focus of the book is on modeling spatial and temporal information.
