Download or read book Etude d algorithmes de classification contextuelle et application a la segmentation d images satellite written by Pascale Masson and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 Processing high resolution images through deep learning techniques written by Praveer Singh and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans cette thèse, nous discutons de quatre scénarios d'application différents qui peuvent être largement regroupés dans le cadre plus large de l'analyse et du traitement d'images à haute résolution à l'aide de techniques d'apprentissage approfondi. Les trois premiers chapitres portent sur le traitement des images de télédétection (RS) captées soit par avion, soit par satellite à des centaines de kilomètres de la Terre. Nous commençons par aborder un problème difficile lié à l'amélioration de la classification des scènes aériennes complexes par le biais d'un paradigme d'apprentissage profondément faiblement supervisé. Nous montrons comment en n'utilisant que les étiquettes de niveau d'image, nous pouvons localiser efficacement les régions les plus distinctives dans les scènes complexes et éliminer ainsi les ambiguïtés qui mènent à une meilleure performance de classification dans les scènes aériennes très complexes. Dans le deuxième chapitre, nous traiterons de l'affinement des étiquettes de segmentation des empreintes de pas des bâtiments dans les images aériennes. Pour ce faire, nous détectons d'abord les erreurs dans les masques de segmentation initiaux et corrigeons uniquement les pixels de segmentation où nous trouvons une forte probabilité d'erreurs. Les deux prochains chapitres de la thèse portent sur l'application des Réseaux Adversariatifs Génératifs. Dans le premier, nous construisons un modèle GAN nuageux efficace pour éliminer les couches minces de nuages dans l'imagerie Sentinel-2 en adoptant une perte de consistance cyclique. Ceci utilise une fonction de perte antagoniste pour mapper des images nuageuses avec des images non nuageuses d'une manière totalement non supervisée, où la perte cyclique aide à contraindre le réseau à produire une image sans nuage correspondant a` l'image nuageuse d'entrée et non à aucune image aléatoire dans le domaine cible. Enfin, le dernier chapitre traite d'un ensemble différent d'images `à haute résolution, ne provenant pas du domaine RS mais plutôt de l'application d'imagerie à gamme dynamique élevée (HDRI). Ce sont des images 32 bits qui capturent toute l'étendue de la luminance présente dans la scène. Notre objectif est de les quantifier en images LDR (Low Dynamic Range) de 8 bits afin qu'elles puissent être projetées efficacement sur nos écrans d'affichage normaux tout en conservant un contraste global et une qualité de perception similaires à ceux des images HDR. Nous adoptons un modèle GAN multi-échelle qui met l'accent à la fois sur les informations plus grossières et plus fines nécessaires aux images à haute résolution. Les sorties finales cartographiées par ton ont une haute qualité subjective sans artefacts perçus.

Download or read book CIKM 13 written by CIKM 13 Conference Committee and published by . This book was released on 2013-10-27 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt: CIKM'13: 22nd ACM International Conference on Information and Knowledge Management Oct 27, 2013-Nov 01, 2013 San Francisco, USA. You can view more information about this proceeding and all of ACM�s other published conference proceedings from the ACM Digital Library: http://www.acm.org/dl.

Download or read book Estimation with Applications to Tracking and Navigation written by Yaakov Bar-Shalom and published by John Wiley & Sons. This book was released on 2004-04-05 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expert coverage of the design and implementation of state estimation algorithms for tracking and navigation Estimation with Applications to Tracking and Navigation treats the estimation of various quantities from inherently inaccurate remote observations. It explains state estimator design using a balanced combination of linear systems, probability, and statistics. The authors provide a review of the necessary background mathematical techniques and offer an overview of the basic concepts in estimation. They then provide detailed treatments of all the major issues in estimation with a focus on applying these techniques to real systems. Other features include: * Problems that apply theoretical material to real-world applications * In-depth coverage of the Interacting Multiple Model (IMM) estimator * Companion DynaEst(TM) software for MATLAB(TM) implementation of Kalman filters and IMM estimators * Design guidelines for tracking filters Suitable for graduate engineering students and engineers working in remote sensors and tracking, Estimation with Applications to Tracking and Navigation provides expert coverage of this important area.

Download or read book MTI Radar written by D. Curtis Schleher and published by Artech House Publishers. This book was released on 1978 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Enterprise Information Systems written by Slimane Hammoudi and published by Springer. This book was released on 2019-07-27 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes extended, revised and selected papers from the 20th International Conference on Enterprise Information Systems, ICEIS 2018, held in Funchal, Madeira, Portugal, in March 2018. The 19 papers presented in this volume were carefully reviewed and selected for inclusion in this book from a total of 242 submissions. They deal with topics such as data science and databases; ontologies; social networks; knowledge management; software development; human-computer interaction, and multimedia.

Download or read book Speech to Speech Translation written by Yutaka Kidawara and published by Springer Nature. This book was released on 2019-11-22 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the readers with retrospective and prospective views with detailed explanations of component technologies, speech recognition, language translation and speech synthesis. Speech-to-speech translation system (S2S) enables to break language barriers, i.e., communicate each other between any pair of person on the glove, which is one of extreme dreams of humankind. People, society, and economy connected by S2S will demonstrate explosive growth without exception. In 1986, Japan initiated basic research of S2S, then the idea spread world-wide and were explored deeply by researchers during three decades. Now, we see S2S application on smartphone/tablet around the world. Computational resources such as processors, memories, wireless communication accelerate this computation-intensive systems and accumulation of digital data of speech and language encourage recent approaches based on machine learning. Through field experiments after long research in laboratories, S2S systems are being well-developed and now ready to utilized in daily life. Unique chapter of this book is end-2-end evaluation by comparing system’s performance and human competence. The effectiveness of the system would be understood by the score of this evaluation. The book will end with one of the next focus of S2S will be technology of simultaneous interpretation for lecture, broadcast news and so on.

Download or read book Advancing Research in Information and Communication Technology written by Michael Goedicke and published by Springer Nature. This book was released on 2021-08-03 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: For 60 years the International Federation for Information Processing (IFIP) has been advancing research in Information and Communication Technology (ICT). This book looks into both past experiences and future perspectives using the core of IFIP's competence, its Technical Committees (TCs) and Working Groups (WGs). Soon after IFIP was founded, it established TCs and related WGs to foster the exchange and development of the scientific and technical aspects of information processing. IFIP TCs are as diverse as the different aspects of information processing, but they share the following aims: To establish and maintain liaison with national and international organizations with allied interests and to foster cooperative action, collaborative research, and information exchange. To identify subjects and priorities for research, to stimulate theoretical work on fundamental issues, and to foster fundamental research which will underpin future development. To provide a forum for professionals with a view to promoting the study, collection, exchange, and dissemination of ideas, information, and research findings and thereby to promote the state of the art. To seek and use the most effective ways of disseminating information about IFIP’s work including the organization of conferences, workshops and symposia and the timely production of relevant publications. To have special regard for the needs of developing countries and to seek practicable ways of working with them. To encourage communication and to promote interaction between users, practitioners, and researchers. To foster interdisciplinary work and – in particular – to collaborate with other Technical Committees and Working Groups. The 17 contributions in this book describe the scientific, technical, and further work in TCs and WGs and in many cases also assess the future consequences of the work’s results. These contributions explore the developments of IFIP and the ICT profession now and over the next 60 years. The contributions are arranged per TC and conclude with the chapter on the IFIP code of ethics and conduct.

Download or read book Thinking Translation written by Sandor Hervey and published by Routledge. This book was released on 2002-09-11 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thinking Translation is a comprehensive and revolutionary 20-week course in translation method. It has been fully and successfully piloted at the University of St. Andrews. The course offers a challenging and entertaining approach to the acquisition of translation skills. Translation is presented as a problem-solving discipline. Discussion, examples and a full range of exercise work allows students to acquire the skills necessary for a broad range of translation problems. Thinking Translation draws on a wide range of material from technical texts to poetry and song.

Download or read book Social Internet of Things written by Alessandro Soro and published by Springer. This book was released on 2018-07-20 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to stimulate research on the topic of the Social Internet of Things, and explore how Internet of Things architectures, tools, and services can be conceptualized and developed so as to reveal, amplify and inspire the capacities of people, including the socialization or collaborations that happen through or around smart objects and smart environments. From new ways of negotiating privacy, to the consequences of increased automation, the Internet of Things poses new challenges and opens up new questions that often go beyond the technology itself, and rather focus on how the technology will become embedded in our future communities, families, practices, and environment, and how these will change in turn.

Download or read book Advances in Data Science written by Edwin Diday and published by John Wiley & Sons. This book was released on 2020-01-09 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data science unifies statistics, data analysis and machine learning to achieve a better understanding of the masses of data which are produced today, and to improve prediction. Special kinds of data (symbolic, network, complex, compositional) are increasingly frequent in data science. These data require specific methodologies, but there is a lack of reference work in this field. Advances in Data Science fills this gap. It presents a collection of up-to-date contributions by eminent scholars following two international workshops held in Beijing and Paris. The 10 chapters are organized into four parts: Symbolic Data, Complex Data, Network Data and Clustering. They include fundamental contributions, as well as applications to several domains, including business and the social sciences.

Download or read book Experience and Learning written by Arthur W. Chickering and published by Transaction Publishers. This book was released on 1977-01-01 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ageing Workers in the European Union written by Juhani Ilmarinen and published by . This book was released on 1999 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Smart and Sustainable Agriculture written by Selma Boumerdassi and published by Springer. This book was released on 2021-12-22 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the First International Conference on Smart and Sustainable Agriculture, SSA 2021, held as a virtual event in June 2021. The 12 papers presented were thoroughly reviewed and selected from the 25 qualified submissions. The papers provide discussion on new trends in communication and networking, Internet of Things, data processing for smart agriculture, renewable-energy based devices, low-cost solutions for wide-area exploitations and developing countries, smart agriculture and urban farming, smart irrigation, application to small-size andlarge-size exploitations, application of ancestral farming to smart agriculture, waste management for agriculture 2.0, and census of regional ancestral farming.

Download or read book Curriculum written by Robert S. Zais and published by Addison-Wesley Longman. This book was released on 1976 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: