Download or read book Filtrage r duction de dimension classification et segmentation morphologique hyperspectrale written by Guillaume Noyel and published by . This book was released on 2008 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chaque cadre doit contenir un résumé de 1000 caractères maximum, espaces compris. En cas de dépassement, la coupure sera automatique. Le doctorant adressera son texte sous forme électronique (disquette, etc.) Pour les modalités pratiques, contactez votre bibliothèques. Le traitement d'images hyperspectrales est la généralisation de l'analyse des images couleurs, à trois composantes rouge, vert et bleu, aux images multivariées à plusieurs dizaines ou plusieurs centaines de composantes. Dans un sens général, les images hyperspectrales ne sont pas uniquement acquises dans le domaine des longueurs d'ondes mais correspondent à une description d'un pixel par un ensemble de valeurs : c'est à dire un vecteur. Chacune des composantes d'une image hyperspectrale constitue un canal spectral, et le vecteur associé à chaque pixel est appelé spectre. Pour valider la généralité de nos méthodes de traitement, nous les avons appliquées à plusieurs types d'imagerie correspondant aux images hyperspectrales les plus variées : des photos avec quelques dizaines de composantes acquises dans le domaine des longueurs d'ondes, des images satellites de télédétection, des séries temporelles d'imagerie par résonance dynamique (DCE-MRI) et des séries temporelles d'imagerie thermique. Durant cette thèse, nous avons développé une chaîne complète de segmentation automatique des images hyperspectrales par des techniques morphologiques. Pour ce faire, nous avons mis au point une méthode efficace de débruitage spectral, par Analyse Factorielle des Correspondances (AFC), qui permet de conserver les contours spatiaux des objets, ce qui est très utile pour la segmentation morphologique. Puis nous avons fait de la réduction de dimension, par des méthodes d'analyse de données ou par modélisation des spectres, afin d'obtenir un autre représentation de l'image avec un nombre restreint de canaux. A partir de cette image de plus faible dimension, nous avons effectué une classification (supervisée ou non) pour grouper les pixels en classes spectralement homogènes. Cependant, les classes obtenues n'étant pas homogènes spatialement, i.e. connexes, une étape de segmentation s'est donc avérée nécessaire. Nous avons démontré que la méthode récente de la Ligne de Partage des Eaux Probabiliste était particulièrement adaptée à la segmentation des images hyperspectrales. Elle utilise différentes réalisations de marqueurs aléatoires, conditionnés par la classification spectrale, pour obtenir des réalisations de contours par Ligne de Partage des Eaux (LPE). Ces réalisations de contours permettent d'estimer une fonction de densité de probabilité de contours (pdf) qui est très facile à segmenter par une LPE classique. En définitive, la LPE probabiliste est conditionnée par la classification spectrale et produit donc des segmentations spatio-spectrales dont les contours sont très lisses. Cette chaîne de traitement à été mise en œuvre sur des séquences d'imagerie par résonance magnétique dynamique (DCE-MRI) et a permis d'établir une méthode automatique d'aide au diagnostic pour la détection de tumeurs cancéreuses. En outre, d'autres techniques de segmentation spatio-spectrales ont été développées pour les images hyperspectrales : les régions η-bornées et les boules μ-géodésiques. Grâce à l'introduction d'information régionale, elles améliorent les segmentations par zones quasi-plates qui n'utilisent quant à elles que de l'information locale. Enfin, nous avons mis au point une méthode très efficace de calcul de toutes les paires de distances géodésiques d'une image, puisqu'elle permet de réduire jusqu'à 50 % le nombre d'opérations par rapport à une approche naïve et jusqu'à 30 % par rapport aux autres méthodes. Le calcul efficace de ce tableau de distances offre des perspectives très prometteuses pour la réduction de dimension spatio-spectrale.
Download or read book R duction de dimension en statistique et application en imagerie hyper spectrale written by Robin Girard and published by . This book was released on 2008 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse est consacrée à l'analyse statistique de données en grande dimension. Nous nous intéressons à trois problèmes statistiques motivés par des applications médicales : la classification supervisée de courbes, la segmentation supervisée d'images hyperspectrales et la segmentation non-supervisée d'images hyperspectrales. Les procédures développées reposent pour la plupart sur la théorie des tests d'hypothèses (tests multiples, minimax, robustes et fonctionnels) et la théorie de l'apprentissage statistique. Ces théories sont introduites dans une première partie. Nous nous intéressons, dans la deuxième partie, à la classification supervisée de données gaussiennes en grande dimension. Nous proposons une procédure de classification qui repose sur une méthode de réduction de dimension et justifions cette procédure sur le plan pratique et théorique. Dans la troisième et dernière partie, nous étudions le problème de segmentation d'images hyper-spectrales. D'une part, nous proposons un algorithme de segmentation supervisée reposant à la fois sur une analyse multi-échelle, une estimation par maximum de vraisemblance pénalisée, et une procédure de réduction de dimension. Nous justifions cet algorithme par des résultats théoriques et des applications pratiques. D'autre part, nous proposons un algorithme de segmentation non supervisée impliquant une décomposition en ondelette des spectres observées en chaque pixel, un lissage spatial par croissance adaptative de régions et une extraction des frontières par une méthode de vote majoritaire.
Download or read book Morphological Image Analysis written by Pierre Soille and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is self-contained in the sense that it is accessible to engineers, scientists, and practitioners having no prior experience with morphology. In addition, most necessary background notions about digital image processing are covered. The emphasis being put on the techniques useful for solving practical problems rather than the theory underlying mathematical morphology, no special knowledge about set theory and topology is required. Nevertheless, the book goes well beyond an introduction to mathematical morphology. Indeed, starting from the fundamental transformations, more elaborate methods which have proven their practical usefulness are explained. This is achieved through a step by step process pursued until the most recent advances.
Download or read book Advanced Image Processing Techniques for Remotely Sensed Hyperspectral Data written by Pramod K. Varshney and published by Springer. This book was released on 2014-03-12 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first of its kind, this book reviews image processing tools and techniques including Independent Component Analysis, Mutual Information, Markov Random Field Models and Support Vector Machines. The book also explores a number of experimental examples based on a variety of remote sensors. The book will be useful to people involved in hyperspectral imaging research, as well as by remote-sensing data like geologists, hydrologists, environmental scientists, civil engineers and computer scientists.
Download or read book Mathematical Morphology and Its Applications to Image Processing written by Jean Serra and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical morphology (MM) is a theory for the analysis of spatial structures. It is called morphology since it aims at analysing the shape and form of objects, and it is mathematical in the sense that the analysis is based on set theory, topology, lattice algebra, random functions, etc. MM is not only a theory, but also a powerful image analysis technique. The purpose of the present book is to provide the image analysis community with a snapshot of current theoretical and applied developments of MM. The book consists of forty-five contributions classified by subject. It demonstrates a wide range of topics suited to the morphological approach.
Download or read book Confocal Microscopy written by Stephen W. Paddock and published by Springer Science & Business Media. This book was released on 2008-02-03 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Confocal Microscopy Methods and Protocols, Stephen Paddock and a highly skilled panel of experts lead the researcher using confocal techniques from the bench top, through the imaging process, to the journal page. They concisely describe all the key stages of confocal imaging-from tissue sampling methods, through the staining process, to the manipulation, presentation, and publication of the realized image. Written in a user-friendly, nontechnical style, the methods specifically cover most of the commonly used model organisms: worms, sea urchins, flies, plants, yeast, frogs, and zebrafish. Centered in the many biological applications of the confocal microscope, the book makes possible the successful imaging of both fixed and living specimens using primarily the laser scanning confocal microscope. The powerful hands-on methods collected in Confocal Microscopy Methods and Protocols will help even the novice to produce first-class cover-quality confocal images.
Download or read book Resource Management Information Systems written by Keith R. McCloy and published by CRC Press. This book was released on 2005-12-21 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resource Management Information Systems: Remote Sensing, GIS and Modelling, Second Edition provides you with the knowledge and skill necessary to design, build, implement, and operate spatial resource management information systems for the management of physical resources. This volume promotes the use of these technologies in a spatial context, enabling you to apply information systems toward the management of resources in agriculture, forestry, land use planning, valuation, engineering, and many additional fields. A follow-up to the first edition, Resource Management Information Systems: Process and Practice, this book offers extensive revisions, reflecting the rapidly evolving nature of the technologies needed to manage spatial resources.
Download or read book Mathematical Morphology written by Laurent Najman and published by John Wiley & Sons. This book was released on 2013-01-24 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical Morphology allows for the analysis and processing of geometrical structures using techniques based on the fields of set theory, lattice theory, topology, and random functions. It is the basis of morphological image processing, and finds applications in fields including digital image processing (DSP), as well as areas for graphs, surface meshes, solids, and other spatial structures. This book presents an up-to-date treatment of mathematical morphology, based on the three pillars that made it an important field of theoretical work and practical application: a solid theoretical foundation, a large body of applications and an efficient implementation. The book is divided into five parts and includes 20 chapters. The five parts are structured as follows: Part I sets out the fundamental aspects of the discipline, starting with a general introduction, followed by two more theory-focused chapters, one addressing its mathematical structure and including an updated formalism, which is the result of several decades of work. Part II extends this formalism to some non-deterministic aspects of the theory, in particular detailing links with other disciplines such as stereology, geostatistics and fuzzy logic. Part III addresses the theory of morphological filtering and segmentation, featuring modern connected approaches, from both theoretical and practical aspects. Part IV features practical aspects of mathematical morphology, in particular how to deal with color and multivariate data, links to discrete geometry and topology, and some algorithmic aspects; without which applications would be impossible. Part V showcases all the previously noted fields of work through a sample of interesting, representative and varied applications.
Download or read book Dugong written by and published by UNEP/Earthprint. This book was released on 2002 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dugong (Dugong dugon) is the only herbivorous mammal that is strictly marine. It has a range spanning some 37 countries, including tropical and subtropical coastal and island waters. This plan presents a global overview of the status of the dugong and its management throughout its range. It contains information on dugong distribution and abundance, threatening processes, legislation, and existing and suggested research and management initiatives for the countries and territories in the dugong’s known range. It is hoped that the comparative information provided will enable individual countries to develop their own, more detailed, conservation plans.
Download or read book Monitoring soils in the environment with remote sensing and gis written by Richard Escadafal and published by IRD Orstom. This book was released on 1996 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: ISSS congress remote sensing
Download or read book Diffusion Weighted MR Imaging written by Dow-Mu Koh and published by Springer Science & Business Media. This book was released on 2010-01-13 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is a great privilege to introduce this book devoted to the current and future roles in research and clinical practice of another exciting new development in MRI: Diffusi- weighted MR imaging. This new, quick and non-invasive technique, which requires no contrast media or i- izing radiation, offers great potential for the detection and characterization of disease in the body as well as for the assessment of tumour response to therapy. Indeed, whereas DW-MRI is already ? rmly established for the study of the brain, progress in MR techn- ogy has only recently enabled its successful application in the body. Although the main focus of this book is on the role of DW-MRI in patients with malignant tumours, n- oncological emerging applications in other conditions are also discussed. The editors of this volume, Dr. D. M. Koh and Prof. H. Thoeny, are internationally well known for their pioneering work in the ? eld and their original contributions to the l- erature on DW-MRI of the body. I am very much indebted to them for the enthusiasm and engagement with which they prepared and edited this splendid volume in a record short time for our series Medical Radiology – Diagnostic section.
Download or read book Image and Signal Processing written by Alamin Mansouri and published by Springer. This book was released on 2018-06-29 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 8th International Conference on Image and Signal Processing, ICISP 2018, held in Cherbourg, France, in July 2018. The 58 revised full papers were carefully reviewed and selected from 122 submissions. The contributions report on the latest developments in image and signal processing, video processing, computer vision, multimedia and computer graphics, and mathematical imaging and vision.
Download or read book Nanodevices for Microwave and Millimeter Wave Applications written by Isabelle Huynen and published by MDPI. This book was released on 2020-06-16 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The microwave and millimeter wave frequency range is nowadays widely exploited in a large variety of fields including (wireless) communications, security, radar, spectroscopy, but also astronomy and biomedical, to name a few. This Special Issue focuses on the interaction between the nanoscale dimensions and centimeter to millimeter wavelengths. This interaction has been proven to be efficient for the design and fabrication of devices showing enhanced performance. Novel contributions are welcome in the field of devices based on nanoscaled geometries and materials. Applications cover, but not are limited to, electronics, sensors, signal processing, imaging and metrology, all exploiting nanoscale/nanotechnology at microwave and millimeter waves. Contributions can take the form of short communications, regular or review papers.
Download or read book Clinical Functional MRI written by Christoph Stippich and published by Springer. This book was released on 2015-02-27 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second, revised edition of this successful textbook provides an up-to-date description of the use of preoperative fMRI in patients with brain tumors and epilepsies. State of the art fMRI procedures are presented, with detailed consideration of practical aspects, imaging and data processing, normal and pathological findings, and diagnostic possibilities and limitations. Relevant information on brain physiology, functional neuroanatomy, imaging technique, and methodology is provided by recognized experts in these fields. Compared with the first edition, chapters have been updated to reflect the latest developments and in particular the current use of diffusion tensor imaging (DTI) and resting-state fMRI. Entirely new chapters are included on resting-state presurgical fMRI and the role of DTI and tractography in brain tumor surgery. Further chapters address multimodality functional neuroimaging, brain plasticity, and pitfalls, tips, and tricks.
Download or read book Infections in Hematology written by Georg Maschmeyer and published by Springer. This book was released on 2014-12-13 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infections are among the most frequent complications in patients with hematological malignancies and in those undergoing high-dose chemotherapy and autologous hematopoietic stem cell transplantation. A profound knowledge on the epidemiology, diagnostic approaches, treatment modalities and prophylactic strategies is essential for the clinical management of these complications in patients who are often severely immunocompromised owing to their underlying diseases and in particular, the intensive myelosuppressive chemo and immunotherapy. This textbook provides a clinically oriented, compact and up-to-date overview on infections in hematology patients and their management. The typical pathogens to be considered in different subgroups of patients are identified and further aspects of the microbiological background are explored. Clinical, imaging, and laboratory-based diagnostic techniques are discussed and therapeutic strategies appropriate to different situations are then presented, with due attention to the pitfalls, toxicities and interactions that can arise during antimicrobial treatment. Strategies to prevent infection are also outlined, encompassing antimicrobial prophylaxis, isolation procedures, hospital hygiene, protective immunization and the use of hematopoietic growth factors.
Download or read book Functional Neuroradiology written by Scott H. Faro and published by Springer Science & Business Media. This book was released on 2011-09-08 with total page 1015 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functional Neuroradiology: Principles and Clinical Applications, is a follow-up to Faro and Mohamed’s groundbreaking work, Functional (BOLD)MRI: Basic Principles and Clinical Applications. This new 49 chapter textbook is comprehensive and offers a complete introduction to the state-of-the-art functional imaging in Neuroradiology, including the physical principles and clinical applications of Diffusion, Perfusion, Permeability, MR spectroscopy, Positron Emission Tomography, BOLD fMRI and Diffusion Tensor Imaging. With chapters written by internationally distinguished neuroradiologists, neurologists, psychiatrists, cognitive neuroscientists, and physicists, Functional Neuroradiology is divided into 9 major sections, including: Physical principles of all key functional techniques, Lesion characterization using Diffusion, Perfusion, Permeability, MR spectroscopy, and Positron Emission Tomography, an overview of BOLD fMRI physical principles and key concepts, including scanning methodologies, experimental research design, data analysis, and functional connectivity, Eloquent Cortex and White matter localization using BOLD fMRI and Diffusion Tensor Imaging, Clinical applications of BOLD fMRI in Neurosurgery, Neurology, Psychiatry, Neuropsychology, and Neuropharmacology, Multi-modality functional Neuroradiology, Beyond Proton Imaging, Functional spine and CSF imaging, a full-color Neuroanatomical Brain atlas of eloquent cortex and key white matter tracts and BOLD fMRI paradigms. By offering readers a complete overview of functional imaging modalities and techniques currently used in patient diagnosis and management, as well as emerging technology, Functional Neuroradiology is a vital information source for physicians and cognitive neuroscientists involved in daily practice and research.
Download or read book Germfree Life And Gnotobiology written by Thomas Luckey and published by Elsevier. This book was released on 2012-12-02 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: Germfree Life and Gnotobiology focuses on the theory and general aspects of germfree research and gnotobiology. Using a phylogenetic approach, the book provides a summary of germfree work in all phyla, from bacteria and viruses to protozoans and invertebrates. It characterizes germfree vertebrates based on data on morphology, biochemistry, nutrition, serology, and physiology. This book is organized into six chapters and begins with an overview of germfree life and gnotobiology, including biological isolation as the basis of germfree life, germfree conditions in nature, and the biological significance of germfree research. A section is devoted to nomenclature and terminology. The chapters on methods and nutrition are sufficiently detailed to serve as guides for experimental work. The book concludes with a chapter on exploratory research that explores the inoculation of germfree animals with known kinds of microorganisms. Terms have been introduced to describe concepts and provide precise communication. This book is a valuable source of information for scientists and researchers engaged in germfree research as a biological tool.
