Download or read book CONCEPTION ET REALISATION D UNE ARCHITECTURE SPECIALISEE POUR LA TRANSFORMATION DE FOURIER BIDIMENSIONNELLE EN TEMPS REEL VIDEO written by GAY.. TALL and published by . This book was released on 1993 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES METHODES DE TRAITEMENT D'IMAGES QUI UTILISENT LA TRANSFORMATION DE FOURIER BIDIMENSIONNELLE SONT NOMBREUSES ET VARIEES. CEPENDANT, L'ENORME QUANTITE DE DONNEES MISES EN JEU PAR CES METHODES ENTRAINE DES TEMPS DE TRAITEMENT ASSEZ ELEVES. C'EST LA RAISON POUR LAQUELLE ELLES SONT TRES PEU UTILISEES EN PRATIQUE. AVEC LE DEVELOPPEMENT DES TECHNIQUES NUMERIQUES PERFORMANTES ET LES PROGRES TECHNOLOGIQUES EFFECTUES DANS CE DOMAINE, LA REALISATION DE CES METHODES DEVIENT POSSIBLE. DANS LE BUT D'ETENDRE CETTE EVOLUTION VERS LES APPLICATIONS TEMPS REEL, NOUS PROPOSONS DANS CETTE THESE UNE ARCHITECTURE SPECIALISEE POUR LA TRANSFORMATION DE FOURIER BIDIMENSIONNELLE EN TEMPS REEL VIDEO. L'OBJECTIF EST D'EFFECTUER EN TEMPS REEL DES TRANSFORMATIONS D'IMAGES DE 512512 POINTS, AU RYTHME DE 25 IMAGES PAR SECONDE. LES DEUX POINTS CRITIQUES DE CETTE ARCHITECTURE ONT ETE LA VITESSE DE TRAITEMENT, LA DYNAMIQUE DU SYSTEME DE CODAGE DES DONNEES. LE CHOIX DU PROCESSEUR DE TRAITEMENT A ETE EFFECTUE SUIVANT CES DEUX CRITERES. L'ARCHITECTURE PROPOSEE, QUI S'INTEGRE DANS L'ENVIRONNEMENT IMAGING, EST CONSTRUITE A BASE DE PROCESSEURS DE FOURIER. ELLE A ETE CONCUE AVEC LE LOGICIEL DE CAO, WORKIEW. LES FONCTIONNALITES OBSERVEES PAR SIMULATION SONT CONFORMES AU SYSTEME SPECIFIE. L'IMPLANTATION DONNE DEUX CARTES AU FORMAT VME
Download or read book Conception et realisation d une architecture specialisee pour la transformation de Fourier bidimensionnelle en temps reel video written by Gay Tall and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CONCEPTION ET REALISATION D UN PROCESSEUR DE TRANSFORMEE DE FOURIER RAPIDE BIDIMENSIONNELLE written by Vincent Meyer and published by . This book was released on 1985 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DE LA TRANSFORMATION DE FOURIER DISCRETE DE SES METHODES DE CALCUL, DES AUTRE TRANSFORMATIONS UTILISANT L'ALGORITME DE LA TRANSFORMATION DE FOURIER RAPIDE (TFR2). ETUDE D'UNE ARCHITECTURE HOTE DU PROCESSEUR DE TRF2: LE PRIM. DESCRIPTION DU PROCESSEUR DE TRF2, IMPLANTATION ET QUELQUES EXEMPLES D'APPLICATION
Download or read book D veloppement d une architecture reconfigurable pour transform e de Fourier rapide written by Florent Camarda and published by . This book was released on 2012 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce rapport traite du développement d'une architecture de Transformée de Fourier Rapide (TFR) reconfigurable pouvant répondre à la plupart des besoins nécessaires aux systèmes de communications numériques employant les modulations multiporteuses de type OFDM. Le premier chapitre rappelle la théorie du signal OFDM de base implique l'utilisation d'une Transformée de Fourier Discrète Inverse (TFDI) à l'émission et d'une Transformée de Fourier Discrète Directe (TFD) en réception. Cette opération constitue alors la plus importante complexité de réalisation matérielle donnant ainsi une importance évidente à son optimisation. Ce chapitre met également en avant le fait que bon nombre d'évolutions de ce type de modulation impliquent l'utilisation de TFD supplémentaires. Le second chapitre a pour but d'apporter une exploration non exhaustive des architectures existantes capable de traiter ces opérations. Des généralités sur les concepts architecturaux sont alors présentées ainsi que les différentes possibilités en matière de reconfiguration de ces dernières. Ainsi différentes architectures existantes sont classifiées selon le type d'algorithme de TFR qu'elles sont capables de traiter mais également selon leur possibilité de reconfiguration. Le troisième chapitre traite quant à lui des deux algorithmes de TFR qui sont exploitables par l'architecture proposée. Après des généralités sur quelques principaux algorithmes et leur classification, les deux algorithmes du Radix et de Winograd (Winograd Fourier Transform Algorithm WFTA) sont étudiés en profondeur. Cette étude montre alors qu'une combinaison astucieuse de ces deux algorithmes permet de traiter un grand ensemble possible de tailles de TFR. Le chapitre quatre présente l'architecture proposée, principale contribution de cette thèse. Cette architecture s'articule autour de trois principaux éléments : le papillon reconfigurable, l'application des coefficients de rotation et les mémoires nécessaires au stockage des données. Deux propositions de configuration sont proposées permettant d'optimiser l'architecture en termes de débit ou de ressources utilisées. Le contrôle de ces éléments est également présenté afin de permettre son implantation matérielle. Le chapitre suivant traite de la représentation des nombres au sein de l'architecture proposée. Après avoir présenté les représentations les plus courantes que sont la représentation en virgule fixe et celle en virgule flottante, l'étude de la représentation des nombres au sein de l'architecture est présentée en virgule fixe. Cette étude conduit alors à des résultats de simulation sur les performances atteignables par l'architecture en termes de Rapport Signal sur Bruit de Quantification (RSBQ). Le dernier chapitre traite de l'application de cette architecture dans le contexte de Télévision Numérique Terrestre (TNT). On rappelle pour les trois standards de diffusion de la TNT que sont DMB-T, ISDB-T et DVB-T les décompositions possibles conduisant à l'estimation des ressources nécessaires. Après quoi une étude des contraintes temporelles liées au contexte de diffusion (donc temps réel) permettra de définir la fréquence minimale nécessaire au bon fonctionnement de l'architecture. Enfin une conclusion générale résumera les avantages et inconvénients de la solution proposée. Elle permettra également de recenser quelques ouvertures possibles à ces travaux.
Download or read book Etude de la conception d architectures mat rielles d di es pour les traitements multim dia written by Abdessalem Ben Abdelali and published by . This book was released on 2007 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse constitue une contribution à l’étude de l’indexation automatique de la vidéo par le contenu en vue de la conception d’architectures matérielles dédiées à ce type d’application multimédia. L’indexation de la vidéo par le contenu présente un domaine de grande importance et qui est sans cesse en développement pour différents types d’applications telles que l’Internet, la TV interactive, les supports vidéo portables (PVR) et les applications de sécurité. L’étude proposée est effectuée à travers des exemples concrets de techniques d’analyse du contenu AV pour l’indexation de la vidéo et selon différents aspects applicatifs, technologiques et méthodologiques. Elle s’inscrit dans le cadre de la conception d’architectures matérielles dédiées et de l’exploitation des nouvelles technologies de systèmes embarqués pour les applications multimédia récentes. Un intérêt particulier est consacré à la technologie reconfigurable et aux nouvelles possibilités et moyens d’utilisation des circuits FPGA. La première phase de cette thèse a été consacrée à l’étude du domaine de l’indexation automatique de la vidéo par le contenu. Il s’agit de l’étude des caractéristiques et des nouveaux besoins des systèmes d’indexation au travers des approches et des techniques actuellement utilisées ainsi que les champs d’application des nouvelles générations de ces systèmes. Ceci afin de montrer l’intérêt d’avoir recours à de nouvelles architectures et à de nouvelles solutions technologiques permettant de supporter les exigences de ce domaine. La deuxième phase de ce travail a été réservée à la validation et à l’optimisation d’un ensemble de descripteurs visuels de la norme MPEG-7 pour la segmentation temporelle de la vidéo. Ceci constitue une étude de cas par l’étude d’un exemple important de techniques d’analyse du contenu AV utilisées dans une grande diversité d’applications. L’étude proposée constitue également une étape de préparation à l’implémentation matérielle de ces techniques dans le contexte de conception d’accélérateurs matériels pour l’indexation automatique de la vidéo par le contenu en temps réel. Dans ce cadre différentes transformations algorithmiques ont été proposées dans le but d’assurer une meilleure Adéquation Algorithme Architecture (AAA) et d’améliorer les performances des algorithmes étudiés. La troisième phase de ce travail a été consacrée à l’étude de la conception d’opérateurs matériels dédiés pour les techniques d’analyse du contenu AV ainsi qu’à l’étude de l’exploitation des nouvelles technologies des systèmes reconfigurables pour la mise en œuvre de SORC pour l’indexation automatique de la vidéo. Plusieurs architectures matérielles ont été proposées pour les descripteurs étudiés et différents concepts liés à l’exploitation de la technologie reconfigurable et les SORC ont été explorés (méthodologies et outils associés pour la conception de tels systèmes sur puce, technologie et méthodes pour la reconfiguration dynamique et partielle, plateformes matérielles à base d’FPGA, structure d’un SORC pour l’indexation de la vidéo par le contenu, etc.).
Download or read book Information Technology for Balanced Manufacturing Systems written by Weiming Shen and published by Springer. This book was released on 2007-03-07 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: BASYS conferences were initially organized to promote the development of balanced automation systems. The first BASYS conference was successfully launched in Victoria, Brazil, in 1995. BASYS'06 is the 7th edition in this series. This book comprises three invited keynote papers and forty-nine regular papers accepted for presentation at the conference. All together, these papers will make significant contributions to the literature of Intelligent Technology for Balanced Manufacturing Systems.
Download or read book Global Burden of Disease and Risk Factors written by Alan D. Lopez and published by World Bank Publications. This book was released on 2006-04-02 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strategic health planning, the cornerstone of initiatives designed to achieve health improvement goals around the world, requires an understanding of the comparative burden of diseases and injuries, their corresponding risk factors and the likely effects of invervention options. The Global Burden of Disease framework, originally published in 1990, has been widely adopted as the preferred method for health accounting and has become the standard to guide the setting of health research priorities. This publication sets out an updated assessment of the situation, with an analysis of trends observed since 1990 and a chapter on the sensitivity of GBD estimates to various sources of uncertainty in methods and data.
Download or read book Digital Imaging of Artefacts Developments in Methods and Aims written by Kate Kelley and published by Archaeopress Publishing Ltd. This book was released on 2018-11-30 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings from a workshop held at Wolfson College, Oxford in 2017. In light of rapid technological developments in digital imaging, this volume aims to inform specialist and general readers about some of the ways in which imaging technologies are transforming the study and presentation of archaeological and cultural artefacts.
Download or read book Metacreation written by Mitchell Whitelaw and published by MIT Press. This book was released on 2004 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first detailed examination of a-life art, where new mediaartists adopt, and adapt, techniques from artificial life.
Download or read book Optics in Our Time written by Mohammad D. Al-Amri and published by Springer. This book was released on 2016-12-12 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: Light and light based technologies have played an important role in transforming our lives via scientific contributions spanned over thousands of years. In this book we present a vast collection of articles on various aspects of light and its applications in the contemporary world at a popular or semi-popular level. These articles are written by the world authorities in their respective fields. This is therefore a rare volume where the world experts have come together to present the developments in this most important field of science in an almost pedagogical manner. This volume covers five aspects related to light. The first presents two articles, one on the history of the nature of light, and the other on the scientific achievements of Ibn-Haitham (Alhazen), who is broadly considered the father of modern optics. These are then followed by an article on ultrafast phenomena and the invisible world. The third part includes papers on specific sources of light, the discoveries of which have revolutionized optical technologies in our lifetime. They discuss the nature and the characteristics of lasers, Solid-state lighting based on the Light Emitting Diode (LED) technology, and finally modern electron optics and its relationship to the Muslim golden age in science. The book’s fourth part discusses various applications of optics and light in today's world, including biophotonics, art, optical communication, nanotechnology, the eye as an optical instrument, remote sensing, and optics in medicine. In turn, the last part focuses on quantum optics, a modern field that grew out of the interaction of light and matter. Topics addressed include atom optics, slow, stored and stationary light, optical tests of the foundation of physics, quantum mechanical properties of light fields carrying orbital angular momentum, quantum communication, and Wave-Particle dualism in action.
Download or read book Interpreting Archaeological Topography written by David Cowley and published by Oxbow Books Limited. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Airborne Laser Scanning (ALS), or lidar, is an enormously important innovation for data collection and interpretation in archaeology. The application of archaeological 3D data deriving from sources including ALS, close-range photogrammetry and terrestrial and photogrammetric scanners has grown exponentially over the last decade. Such data present numerous possibilities and challenges, from ensuring that applications remain archaeologically relevant, to developing practices that integrate the manipulation and interrogation of complex digital datasets with the skills of archaeological observation and interpretation. This volume addresses the implications of multi-scaled topographic data for contemporary archaeological practice in a rapidly developing field, drawing on examples of ongoing projects and reflections on best practice. Twenty papers from across Europe explore the implications of these digital 3D datasets for the recording and interpretation of archaeological topography, whether at the landscape, site or artifact scale. The papers illustrate the variety of ways in which we engage with archaeological topography through 3D data, from discussions of its role in landscape archaeology, to issues of context and integration, and to the methodological challenges of processing, visualization and manipulation. Critical reflection on developing practice and implications for cultural resource management and research contextualize the case studies and applications, illustrating the diverse and evolving roles played by multi-scalar topographic data in contemporary archaeology.
Download or read book Philosophy of Complex Systems written by and published by Elsevier. This book was released on 2011-05-23 with total page 951 pages. Available in PDF, EPUB and Kindle. Book excerpt: The domain of nonlinear dynamical systems and its mathematical underpinnings has been developing exponentially for a century, the last 35 years seeing an outpouring of new ideas and applications and a concomitant confluence with ideas of complex systems and their applications from irreversible thermodynamics. A few examples are in meteorology, ecological dynamics, and social and economic dynamics. These new ideas have profound implications for our understanding and practice in domains involving complexity, predictability and determinism, equilibrium, control, planning, individuality, responsibility and so on.Our intention is to draw together in this volume, we believe for the first time, a comprehensive picture of the manifold philosophically interesting impacts of recent developments in understanding nonlinear systems and the unique aspects of their complexity. The book will focus specifically on the philosophical concepts, principles, judgments and problems distinctly raised by work in the domain of complex nonlinear dynamical systems, especially in recent years.-Comprehensive coverage of all main theories in the philosophy of Complex Systems -Clearly written expositions of fundamental ideas and concepts -Definitive discussions by leading researchers in the field -Summaries of leading-edge research in related fields are also included
Download or read book Rigorous System Design written by Joseph Sifakis and published by . This book was released on 2013-03-20 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deals with the formalization of the design of mixed hardware/software systems. It advocates rigorous system design as a model-based process leading from requirements to correct implementations and presents the current state of the art in system design, discusses its limitations and identifies possible avenues for overcoming them.
Download or read book Microelectronics Education written by Ton J. Mouthaan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dear participant in the second European Workshop on Microelectronics Education, It is a pleasure to present you the Proceedings of the Second European Workshop on Microelectronics Education and to welcome you at the Workshop. The Organising Committee is very pleased that it has found several key persons, with highly appreciated levels of knowledge and expertise, willing to present Invited Contributions to this Workshop. We have striven for an interesting spread over important areas like the expected demands for educated engineers in the wide field of Microelectronics, and Microsystems, in European industry (and beyond!) and innovations in method and focus of our educational programmes. This is the second European Workshop in this area; the first one was held in Grenoble in France in the spring of 1996. It was the initiative of Georges Kamarinos, Nadine Guillemot and Bernard Courtois to organise this Workshop because they felt that Microelectronics was 'at a turning point' to become the core of the largest industry in the world and that this warranted a serious (re-)consideration of our educational imperatives. It is now two years since and their feeling has become reality: nobody doubts that by the year 2000 the microelecnonics industry will be the largest industrial sector. It is also obvious that because of that and because of the predicted shortfall of educated engineers we must continuously reconsider the quality of our educational approach.
Download or read book Signal Processing for Communications written by Paolo Prandoni and published by Collection Savoir suisse. This book was released on 2008-06-17 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: With a novel, less classical approach to the subject, the authors have written a book with the conviction that signal processing should be taught to be fun. The treatment is therefore less focused on the mathematics and more on the conceptual aspects, the idea being to allow the readers to think about the subject at a higher conceptual level, thus building the foundations for more advanced topics. The book remains an engineering text, with the goal of helping students solve real-world problems. In this vein, the last chapter pulls together the individual topics as discussed throughout the book into an in-depth look at the development of an end-to-end communication system, namely, a modem for communicating digital information over an analog channel.
Download or read book Ultra Wide Band Antennas written by Xavier Begaud and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra Wide Band Technology (UWB) has reached a level of maturity that allows us to offer wireless links with either high or low data rates. These wireless links are frequently associated with a location capability for which ultimate accuracy varies with the inverse of the frequency bandwidth. Using time or frequency domain waveforms, they are currently the subject of international standards facilitating their commercial implementation. Drawing up a complete state of the art, Ultra Wide Band Antennas is aimed at students, engineers and researchers and presents a summary of internationally recognized studies.
Download or read book Diffusion in Solids Liquids Gases written by Wilhelm Jost and published by . This book was released on 1952 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
