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Book Description
LE PROBLEME DE RESTITUTION D'UNE SCENE A PARTIR D'UNE IMAGE NUMERIQUE DEGRADEE, SANS INFORMATION A PRIORI, POSE DES DIFFICULTES D'ORDRE THEORIQUE ET PRATIQUE DUES AUX BRUITS SUR LES DONNEES. CE MEMOIRE PRESENTE UNE CONTRIBUTION A L'AUTOMATISATION DES OPERATIONS D'IDENTIFICATION DES SOURCES DE DEGRADATION, DE FILTRAGE ET DE RESTAURATION A PARTIR DE L'IMAGE 2-D OBSERVEE SEULE. LA MODELISATION DES SOURCES DE DEGRADATION PAR L'ETUDE DU MECANISME DE FORMATION DE L'IMAGE, D'UNE PART ET LA MODELISATION DES IMAGES 2-D PAR DES CHAMPS STOCHASTIQUES D'AUTRE PART SERVENT DE BASE A L'ELABORATION D'UN OUTIL D'ANALYSE ET AU DEVELOPPEMENT D'ALGORITHMES DE TRAITEMENT. DES ALGORITHMES DE FILTRAGE DE BRUITS, DE NATURES DIVERSES ET PLUS PARTICULIEREMENT LES BRUITS MULTIPLICATIFS, ONT ETE ETUDIES. L'UTILISATION D'OPERATEURS LOCAUX NOUS A PERMIS DE TENIR COMPTE DE L'ASPECT PRESERVATION DES CONTOURS. PLUSIEURS METHODES DE RESTAURATION D'IMAGES FLOUES, NOTAMMENT UN FILTRAGE DE KALMAN 2-D SEMI-RECURSIF, ONT ETE PROSPECTEES. UNE IDENTIFICATION DU FLOU BASEE SUR CELLE D'UN PROCESSUS ARMA ET UNE ESTIMATION DE LA NATURE DU BRUIT BASEE SUR LA NOTION D'HOMOGENEITE LOCALE SONT PROPOSEES; UN TRAITEMENT OPTIMAL APPROPRIE EST ENSUITE APPLIQUE. NOS RESULTATS SONT COMPARES AVEC CEUX OBTENUS A PARTIR D'ALGORITHMES CONNUS EN TRAITEMENT D'IMAGES.
Author: J. Sklansky Publisher: Springer Science & Business Media ISBN: 3642932185 Category : Medical Languages : en Pages : 339
Book Description
The technology of automatic pattern recognition and digital image processing, after over two decades of basic research, is now appearing in important applications in biology and medicine as weIl as industrial, military and aerospace systems. In response to a suggestion from Mr. Norman Caplan, ·the Program Director for Automation, Bioengineering and Sensing at the United States National Science Foundation, the authors of this book organized the first Uni ted States-France Seminar on Biomedical Image Processing. The seminar met at the Hotel Beau Site, St. Pierre de Chartreuse, France on May 27-31, 1980. This book contains most of the papers presented at this seminar, as weIl as two papers (by Bisconte et al. and by Ploem ~ al.) discussed at the seminar but not appearing on the program. We view the subject matter of this seminar as a confluence amon~ three broad scientific and engineering disciplines: 1) biology and medicine, 2) imaging and optics, and 3) computer science and computer engineering. The seminar had three objectives: 1) to discuss the state of the art of biomedical image processing with emphasis on four themes: microscopic image analysis, radiological image analysis, tomography, and image processing technology; 2) to place values on directions for future research so as to give guidance to agencies supporting such research; and 3) to explore and encourage various areas of cooperative research between French and Uni ted States scientists within the field of Biomedical Image Processing.
Author: Ali Mohamad-Djafari Publisher: John Wiley & Sons ISBN: 1118600460 Category : Technology & Engineering Languages : en Pages : 369
Book Description
The concept of an inverse problem is a familiar one to most scientists and engineers, particularly in the field of signal and image processing, imaging systems (medical, geophysical, industrial non-destructive testing, etc.), and computer vision. In imaging systems, the aim is not just to estimate unobserved images but also their geometric characteristics from observed quantities that are linked to these unobserved quantities by a known physical or mathematical relationship. In this manner techniques such as image enhancement or addition of hidden detail can be delivered. This book focuses on imaging and vision problems that can be clearly described in terms of an inverse problem where an estimate for the image and its geometrical attributes (contours and regions) is sought. The book uses a consistent methodology to examine inverse problems such as: noise removal; restoration by deconvolution; 2D or 3D reconstruction in X-ray, tomography or microwave imaging; reconstruction of the surface of a 3D object using X-ray tomography or making use of its shading; reconstruction of the surface of a 3D landscape based on several satellite photos; super-resolution; motion estimation in a sequence of images; separation of several images mixed using instruments with different sensitivities or transfer functions; and much more.
Author: John C. Russ Publisher: CRC Press ISBN: 0203881095 Category : Medical Languages : en Pages : 836
Book Description
Now in its fifth edition, John C. Russ‘s monumental image processing reference is an even more complete, modern, and hands-on tool than ever before. The Image Processing Handbook, Fifth Edition is fully updated and expanded to reflect the latest developments in the field. Written by an expert with unequalled experience and authority, it offers clea
Author: Simon J. Godsill Publisher: Springer ISBN: 1447115619 Category : Technology & Engineering Languages : en Pages : 335
Book Description
The application of digital signal processing (DSP) to problems in audio has been an area of growing importance since the pioneering DSP work of the 1960s and 70s. In the 1980s, DSP micro-chips became sufficiently powerful to handle the complex processing operations required for sound restoration in real-time, or close to real-time. This led to the first commer cially available restoration systems, with companies such as CEDAR Audio Ltd. in the UK and Sonic Solutions in the US selling dedicated systems world-wide to recording studios, broadcasting companies, media archives and film studios. Vast amounts of important audio material, ranging from historic recordings of the last century to relatively recent recordings on analogue or even digital tape media, were noise-reduced and re-released on CD for the increasingly quality-conscious music enthusiast. Indeed, the first restorations were a revelation in that clicks, crackles and hiss could for the first time be almost completely eliminated from recordings which might otherwise be un-releasable in CD format. Until recently, however, digital audio processing has required high-powered computational engines which were only available to large institutions who could afford to use the sophisticated digital remastering technology. With the advent of compact disc and other digital audio formats, followed by the increased accessibility of home computing, digital audio processing is now available to anyone who owns a PC with sound card, and will be of increasing importance, in association with digital video, as the multimedia revolution continues into the next millennium.
Author: Husrev Taha Sencar Publisher: Springer Science & Business Media ISBN: 1461407575 Category : Technology & Engineering Languages : en Pages : 369
Book Description
Photographic imagery has come a long way from the pinhole cameras of the nineteenth century. Digital imagery, and its applications, develops in tandem with contemporary society’s sophisticated literacy of this subtle medium. This book examines the ways in which digital images have become ever more ubiquitous as legal and medical evidence, just as they have become our primary source of news and have replaced paper-based financial documentation. Crucially, the contributions also analyze the very profound problems which have arisen alongside the digital image, issues of veracity and progeny that demand systematic and detailed response: It looks real, but is it? What camera captured it? Has it been doctored or subtly altered? Attempting to provide answers to these slippery issues, the book covers how digital images are created, processed and stored before moving on to set out the latest techniques for forensically examining images, and finally addressing practical issues such as courtroom admissibility. In an environment where even novice users can alter digital media, this authoritative publication will do much so stabilize public trust in these real, yet vastly flexible, images of the world around us.
Author: Euclid Seeram Publisher: Saunders ISBN: 9781416028956 Category : Tomography Languages : en Pages : 0
Book Description
Radiologic technologists play an important role in the care and management of patients undergoing advanced imaging procedures. This new edition provides the up-to-date information and thorough coverage you need to understand the physical principles of computed tomography (CT) and safely produce high-quality images. You'll gain valuable knowledge about the practice of CT scanning, effective communication with other medical personnel, and sectional anatomic images as they relate to CT. Features a chapter devoted to quality control testing of CT scanners (both spiral CT and conventional scan-and-stop), helping you achieve and maintain high quality control standards. Provides the latest information on: advances in volume CT scanning; CT fluoroscopy; multi-slice spiral/helical CT; and multi-slice applications such as 3-D imaging, CT angiography, and virtual reality imaging (endoscopy)--all with excellent coverage of state-of-the-art principles, instrumentation, clinical applications and quality control. Two new chapters cover recent developments and important principles of multislice CT and PET/CT, giving you in-depth coverage of these quickly emerging aspects of CT.
Author: Mohamed Sabri
Author: J. Sklansky
Author: Ali Mohamad-Djafari
Author: Yves Meyer
Author: John C. Russ
Author: Simon J. Godsill
Author: Jacques Marilleau
Author: 
Author: Husrev Taha Sencar
Author: 
Author: Euclid Seeram