Download or read book Modelisation stochastique et classification des images satellite par methodes statistiques written by Nicole Marhic Aguirre and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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

Download or read book Satellite Image Analysis Clustering and Classification written by Surekha Borra and published by Springer. This book was released on 2019-02-08 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thanks to recent advances in sensors, communication and satellite technology, data storage, processing and networking capabilities, satellite image acquisition and mining are now on the rise. In turn, satellite images play a vital role in providing essential geographical information. Highly accurate automatic classification and decision support systems can facilitate the efforts of data analysts, reduce human error, and allow the rapid and rigorous analysis of land use and land cover information. Integrating Machine Learning (ML) technology with the human visual psychometric can help meet geologists’ demands for more efficient and higher-quality classification in real time. This book introduces readers to key concepts, methods and models for satellite image analysis; highlights state-of-the-art classification and clustering techniques; discusses recent developments and remaining challenges; and addresses various applications, making it a valuable asset for engineers, data analysts and researchers in the fields of geographic information systems and remote sensing engineering.

Download or read book Extraction de caract ristiques de texture pour la classification d images satellites written by Majdoulayne Hanifi and published by . This book was released on 2009 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse s'inscrit dans le cadre général du traitement des données multimédias. Nous avons plus particulièrement exploité les images satellitaires pour la mise en application de ces traitements. Nous nous sommes intéressés à l'extraction de variables et de caractéristiques texturelles ; nous avons proposé une nouvelle méthode de pré-traitement des textures afin d'améliorer l'extraction de ces attributs caractéristiques. L'augmentation de la résolution des satellites récents a, paradoxalement, perturbé les chercheurs lors des premières classifications sur des données à haute résolution. Les cartes très homogènes, obtenues jusqu'alors en moyenne résolution, devenaient très fragmentées et difficiles à utiliser avec les mêmes algorithmes de classification. Une façon de remédier à ce problème consiste à caractériser le pixel en cours de classification par des paramètres mesurant l'organisation spatiale des pixels de son voisinage. Il existe plusieurs approches à l'analyse de texture dans les images. Dans le cadre des images satellitaires, l'approche statistique semble être habituellement retenue, ainsi que les méthodes des matrices de cooccurrences et du corrélogramme, basées sur l'analyse statistique au deuxième ordre (au sens des probabilités sur des couples de pixels). Et ce sont les deux dernières méthodes sur lesquelles nous allons se baser pour en extraire l'information texturelle sous forme d'un vecteur. Ces matrices présentent des inconvénients, tels que la taille mémoire nécessaire et le temps de calcul des paramètres élevé. Pour contourner ce problème, nous avons cherché une méthode de réduction du nombre de niveaux de gris appelée codage de rang (permettant de passer, dans un premier temps de 256 niveaux à 9 niveaux de gris, puis ensuite pour améliorer la qualité de l'image, passer de 9 à 16 niveaux de gris), tout en conservant la structure et la texture de l'image. L'ensemble de cette thèse a donc permis de montrer que la méthode de codage est une meilleure façon pour compresser une image sans toutefois perdre de l'information texturelle. Il permet de réduire la taille des données, ce qui réduira le temps de calcul des caractéristiques.

Download or read book Etude d algorithmes de classification contextuelle et application 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)

Download or read book Francis bibliographie g ographique internationale written by and published by . This book was released on 1994 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Medical Image Computing and Computer Assisted Intervention MICCAI 2012 written by Nicholas Ayache and published by Springer. This book was released on 2012-08-28 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: The three-volume set LNCS 7510, 7511, and 7512 constitutes the refereed proceedings of the 15th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2012, held in Nice, France, in October 2012. Based on rigorous peer reviews, the program committee carefully selected 252 revised papers from 781 submissions for presentation in three volumes. The third volume includes 79 papers organized in topical sections on diffusion imaging: from acquisition to tractography; image acquisition, segmentation and recognition; image registration; neuroimage analysis; analysis of microscopic and optical images; image segmentation; diffusion weighted imaging; computer-aided diagnosis and planning; and microscopic image analysis.

Download or read book Design and Modeling of Mechanical Systems written by Mohamed Haddar and published by Springer Science & Business Media. This book was released on 2013-03-12 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 5th International Congress on Design and Modeling of Mechanical Systems (CMSM) was held in Djerba, Tunisia on March 25-27, 2013 and followed four previous successful editions, which brought together international experts in the fields of design and modeling of mechanical systems, thus contributing to the exchange of information and skills and leading to a considerable progress in research among the participating teams. The fifth edition of the congress (CMSM ́2013), organized by the Unit of Mechanics, Modeling and Manufacturing (U2MP) of the National School of Engineers of Sfax, Tunisia, the Mechanical Engineering Laboratory (MBL) of the National School of Engineers of Monastir, Tunisia and the Mechanics Laboratory of Sousse (LMS) of the National School of Engineers of Sousse, Tunisia, saw a significant increase of the international participation. This edition brought together nearly 300 attendees who exposed their work on the following topics: mechatronics and robotics, dynamics of mechanical systems, fluid structure interaction and vibroacoustics, modeling and analysis of materials and structures, design and manufacturing of mechanical systems. This book is the proceedings of CMSM ́2013 and contains a careful selection of high quality contributions, which were exposed during various sessions of the congress. The original articles presented here provide an overview of recent research advancements accomplished in the field mechanical engineering.

Download or read book Hydrology written by Andre Musy and published by CRC Press. This book was released on 2010-12-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Looking beyond a purely scientific discussion of hydrology, the authors of this volume emphasize that mankind needs to recognize the urgency of the situation in which our water is threatened. Providing a comprehensive overview of the broad and complex field of hydrology, the book explores the water cycle, its various components, and its interactions with the environment in which it develops and interacts. Through this work, the authors endeavor to contribute to the sustainable development of our society and our environment.

Download or read book Multiple Criteria Optimization written by Xavier Gandibleux and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: The generalized area of multiple criteria decision making (MCDM) can be defined as the body of methods and procedures by which the concern for multiple conflicting criteria can be formally incorporated into the analytical process. MCDM consists mostly of two branches, multiple criteria optimization and multi-criteria decision analysis (MCDA). While MCDA is typically concerned with multiple criteria problems that have a small number of alternatives often in an environment of uncertainty (location of an airport, type of drug rehabilitation program), multiple criteria optimization is typically directed at problems formulated within a mathematical programming framework, but with a stack of objectives instead of just one (river basin management, engineering component design, product distribution). It is about the most modern treatment of multiple criteria optimization that this book is concerned. I look at this book as a nicely organized and well-rounded presentation of what I view as ”new wave” topics in multiple criteria optimization. Looking back to the origins of MCDM, most people agree that it was not until about the early 1970s that multiple criteria optimization c- gealed as a field. At this time, and for about the following fifteen years, the focus was on theories of multiple objective linear programming that subsume conventional (single criterion) linear programming, algorithms for characterizing the efficient set, theoretical vector-maximum dev- opments, and interactive procedures.

Download or read book Quantum Mechanics Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.

Download or read book Terrigenous Mass Movements written by Biswajeet Pradhan and published by Springer Science & Business Media. This book was released on 2012-04-02 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Terrestrial mass movements (i.e. cliff collapses, soil creeps, mudflows, landslides etc.) are severe forms of natural disasters mostly occurring in mountainous terrain, which is subjected to specific geological, geomorphological and climatological conditions, as well as to human activities. It is a challenging task to accurately define the position, type and activity of mass movements for the purpose of creating inventory records and potential vulnerability maps. Remote sensing techniques, in combination with Geographic Information System tools, allow state-of-the-art investigation of the degree of potential mass movements and modeling surface processes for hazard and risk mapping. Similarly, through statistical prediction models, future mass-movement-prone areas can be identified and damages can to a certain extent be minimized. Issues of scale and selection of morphological attributes for the scientific analysis of mass movements call for new developments in data modeling and spatio-temporal GIS analysis. The book is a product of a cooperation between the editors and several contributing authors, addressing current issues and recent developments in GI technology and mass movements research. Its fundamental treatment of this technology includes data modeling, topography, geology, geomorphology, remote sensing, artificial neural networks, binomial regression, fuzzy logic, spatial statistics and analysis, and scientific visualization. Both theoretical and practical issues are addressed.

Download or read book Life Insurance Mathematics written by Hans U. Gerber and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: HaIley's Comet has been prominently displayed in many newspapers during the last few months. For the first time in 76 years it appeared this winter, clearly visible against the nocturnal sky. This is an appropriate occasion to point out the fact that Sir Edmund Halley also constructed the world's first life table in 1693, thus creating the scientific foundation of life insurance. Halley's life table and its successors were viewed as deterministic laws, i. e. the number of deaths in any given group and year was considered to be a weIl defined number that could be calculated by means of a life table. However, in reality this number is random. Thus any mathematical treatment of life insurance will have to rely more and more on prob ability theory. By sponsoring this monograph the Swiss Association of Actuaries wishes to support the "modern" probabilistic view oflife contingencies. We are fortu nate that Professor Gerber, an internationally renowned expert, has assumed the task of writing the monograph. We thank the Springer-Verlag and hope that this monograph will be the first in a successful series of actuarial texts. Hans Bühlmann Zürich, March 1986 President Swiss Association of Actuaries Preface Two major developments have influenced the environment of actuarial math ematics. One is the arrival of powerful and affordable computers; the once important problem of numerical calculation has become almost trivial in many instances.

Download or read book Tensors in Image Processing and Computer Vision written by Santiago Aja-Fernández and published by Springer Science & Business Media. This book was released on 2009-05-21 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tensor signal processing is an emerging field with important applications to computer vision and image processing. This book presents the state of the art in this new branch of signal processing, offering a great deal of research and discussions by leading experts in the area. The wide-ranging volume offers an overview into cutting-edge research into the newest tensor processing techniques and their application to different domains related to computer vision and image processing. This comprehensive text will prove to be an invaluable reference and resource for researchers, practitioners and advanced students working in the area of computer vision and image processing.

Download or read book Le Golfe Du Saint Laurent petit Oc an Ou Grand Estuaire written by Canada. Department of Fisheries and Oceans and published by Peches Et Oceans Direction Generale Des Communications = Fisheries and Oceans Communications Dir. This book was released on 1991 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop, the scientific reviews and the contributed papers presented at the symposium. The document presents a brief historical summary of marine research in the Gulf; reports the discussions, conclusions and recommendations of the different working groups on oceanography (physics, biology, chemistry and sedimentology) and on the fishery (fish and invertebrates); then presents the discussions of each multidisciplinary working group, centered around how the St. Lawrence system may be used as a natural laboratory which will contribute to the solution of major long-term problems of conservation of natural resources and of the quality of the environment.

Download or read book Medical image computing and computer assisted intervention written by Nicholas Ayache and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Practical Time Series Analysis written by Aileen Nielsen and published by O'Reilly Media. This book was released on 2019-09-20 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time series data analysis is increasingly important due to the massive production of such data through the internet of things, the digitalization of healthcare, and the rise of smart cities. As continuous monitoring and data collection become more common, the need for competent time series analysis with both statistical and machine learning techniques will increase. Covering innovations in time series data analysis and use cases from the real world, this practical guide will help you solve the most common data engineering and analysis challengesin time series, using both traditional statistical and modern machine learning techniques. Author Aileen Nielsen offers an accessible, well-rounded introduction to time series in both R and Python that will have data scientists, software engineers, and researchers up and running quickly. You’ll get the guidance you need to confidently: Find and wrangle time series data Undertake exploratory time series data analysis Store temporal data Simulate time series data Generate and select features for a time series Measure error Forecast and classify time series with machine or deep learning Evaluate accuracy and performance