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Reconstruction Tomographique En Geometrie Conique Par La Technique Du Maximum De Vraisemblance Optimisation Et Parallelisation
Download Reconstruction Tomographique En Geometrie Conique Par La Technique Du Maximum De Vraisemblance Optimisation Et Parallelisation full books in PDF, epub, and Kindle. Read online Reconstruction Tomographique En Geometrie Conique Par La Technique Du Maximum De Vraisemblance Optimisation Et Parallelisation ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Reconstruction tomographique en geometrie conique par la technique du maximum de vraisemblance : optimisation et parallelisation by : Khaldoun Al-Khalidi
Download or read book Reconstruction tomographique en geometrie conique par la technique du maximum de vraisemblance : optimisation et parallelisation written by Khaldoun Al-Khalidi and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reconstruction tomographique en géométrie conique par la technique du maximum de vraisemblance by : Khaldoun Al-Khalidi
Download or read book Reconstruction tomographique en géométrie conique par la technique du maximum de vraisemblance written by Khaldoun Al-Khalidi and published by . This book was released on 1996 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail s'intègre dans le contexte de l'imagerie isotopique. Il concerne la mise en œuvre sur un réseau de transputers d'une méthode de reconstruction 3D de la distribution des coefficients d'atténuation, à partir de projections obtenues en géométrie conique. La connaissance de ces coefficients permettant l'amélioration de la correction de l'atténuation en tomographie d'émission monophotonique. Nous avons opté pour les méthodes de reconstruction statistiques basées sur le principe de Maximum de Vraisemblance. Afin de calculer l'estimateur de Maximum de Vraisemblance nous nous sommes basés sur l'algorithme d'Espérance et Maximisation (EM). En formulant ce dernier sous une forme gradient, nous avons proposé une méthode d'optimisation de type Maximisation Unidimensionnelle. Nous l'avons implantée sous le nom de l'algorithme EM-MU. Ensuite, nous nous sommes intéressés au caractère mal posé du problème de la reconstruction dans le cas de l'estimateur de Maximum de Vraisemblance. Nous avons proposé une technique de régularisation basée sur une approche bayésienne et nous l'avons implantée sous le nom de l'algorithme EM-MAP. Afin de valider nos travaux, nous avons mis en œuvre un simulateur de transport de photons en transmission, basé sur la méthode de Monte Carlo. Nous avons comparé les algorithmes EM-MU et EM-MAP avec deux algorithmes de reconstruction très connus (ART et Feldkamp). L'algorithme EM-MU a donné les meilleurs résultats sur le plan qualitatif et quantitatif, Ainsi nous avons choisi de la parallèliser. Nous avons proposé une méthode de parallèlisation basée sur la technique maitre-esclave avec une répartition de charges, et nous l'avons implanté sur un réseau constitué de trois transputers. La parallèlisation s'est avérée efficace ce qui montre l'intérêt d'une telle approche pour envisager l'utilisation de l'algorithme EM-MU en routine clinique.
Book Synopsis Product Life-Cycle Management by : Max Giordano
Download or read book Product Life-Cycle Management written by Max Giordano and published by John Wiley & Sons. This book was released on 2012-12-17 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis From Photon to Pixel by : Henri Maître
Download or read book From Photon to Pixel written by Henri Maître and published by John Wiley & Sons. This book was released on 2015-10-26 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: The digital camera conceals remarkable technological innovations that affect the formation of the image, the color representation or automated measurements and settings. ** From photon to pixel photon ** describes the device both from the point of view of the physics of the phenomena involved, as technical components and software it uses. Based on the perceptual properties of the visual system as well as on standard transmission and representation, analyzes the solutions to meet the demands of the photographer on the development, contrast, white balance or stabilization of image. The advanced architectures adopted in mobile phones and developments of computational photography are also presented, foreshadowing the features of the future device.
Book Synopsis Image Modeling by : Azriel Rosenfeld
Download or read book Image Modeling written by Azriel Rosenfeld and published by Academic Press. This book was released on 2014-05-10 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Image Modeling compiles papers presented at a workshop on image modeling in Rosemont, Illinois on August 6-7, 1979. This book discusses the mosaic models for textures, image segmentation as an estimation problem, and comparative analysis of line-drawing modeling schemes. The statistical models for the image restoration problem, use of Markov random fields as models of texture, and mathematical models of graphics are also elaborated. This text likewise covers the univariate and multivariate random field models for images, stochastic image models generated by random tessellations of the plane, and long crested wave models. Other topics include the Boolean model and random sets, structural basis for image description, and structure in co-occurrence matrices for texture analysis. This publication is useful to specialists and professionals working in the field of image processing.
Download or read book Skeletonization written by Punam K Saha and published by Academic Press. This book was released on 2017-06-06 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Skeletonization: Theory, Methods and Applications is a comprehensive reference on skeletonization, written by the world's leading researchers in the field. The book presents theory, methods, algorithms and their evaluation, together with applications. Skeletonization is used in many image processing and computer vision applications such as shape recognition and analysis, shape decomposition and character recognition, as well as medical imaging for pulmonary, cardiac, mammographic applications. Part I includes theories and methods unique to skeletonization. Part II includes novel applications including skeleton-based characterization of human trabecular bone micro-architecture, image registration and correspondence establishment in anatomical structures, skeleton-based fast, fully automated generation of vessel tree structure for clinical evaluation of blood vessel systems. - Offers a complete picture of skeletonization and its application to image processing, computer vision, pattern recognition and biomedical engineering - Provides an in-depth presentation on various topics of skeletonization, including principles, theory, methods, algorithms, evaluation and real-life applications - Discusses distance-analysis, geometry, topology, scale and symmetry-analysis in the context of object understanding and analysis using medial axis and skeletonization
Book Synopsis Digital Representations of the Real World by : Marcus A. Magnor
Download or read book Digital Representations of the Real World written by Marcus A. Magnor and published by CRC Press. This book was released on 2015-05-07 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Create Genuine Visual Realism in Computer Graphics Digital Representations of the Real World: How to Capture, Model, and Render Visual Reality explains how to portray visual worlds with a high degree of realism using the latest video acquisition technology, computer graphics methods, and computer vision algorithms. It explores the integration of ne
Book Synopsis Artificial Intelligence and Cognition by : Hamid R. Arabnia
Download or read book Artificial Intelligence and Cognition written by Hamid R. Arabnia and published by 2019 Worldcomp Internation. This book was released on 2020-03-13 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary goal of the Applied Cognitive Computing conference is to provide a platform for researchers, scientists, industry experts and scholars to share their novel ideas and research results on the application of human cognition models in various practical computing applications. Through this conference, the organizers would like to develop an interdisciplinary venue to contribute and discuss the ongoing innovations, applications and solutions to challenging problems of engineering human brain processes, learning mechanisms and decision making processes. This book contains the proceedings of the 2019 International Conference on Applied Cognitive Computing (ACC'19).
