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Author: Yves Meyer
Publisher: Atlantica Séguier Frontières
ISBN: 9782863321300
Category : Wavelets
Languages : en
Pages : 808
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Book Description
Author: Yves Meyer
Publisher: Atlantica Séguier Frontières
ISBN: 9782863321300
Category : Wavelets
Languages : en
Pages : 808
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Book Description
Author: FOUAD.. LABRIKI
Publisher:
ISBN:
Category :
Languages : fr
Pages : 11
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Book Description
LES TRAVAUX DE CE MEMOIRE CONCERNENT LE CODAGE D'IMAGES FIXES OU EN MOUVEMENT S'APPUYANT SUR UNE TRANSFORMATION EN ONDELETTES. L'OBJECTIF VISE EST LA TRANSMISSION DU SIGNAL DE TELEVISION NUMERIQUE AVEC UN DEBIT GLOBAL SE SITUANT ENTRE 10 ET 15 MBIT/S. L'APPLICATION AUX IMAGES FIXES DE LA TRANSFORMEE EN ONDELETTES AVEC UN DECOUPAGE EN DEUX NIVEAUX, PERMET L'ELABORATION DE DEUX SCHEMAS DE CODAGE: LE PREMIER, CONSISTE A APPLIQUER UNE DCT 1616 AUX SOUS-IMAGES TRANSFORMEES EN ONDELETTES ET A EFFECTUER UNE CLASSIFICATION DES BLOCS DCT SELON TROIS ATTRIBUTS CARACTERISTIQUES. CETTE CLASSIFICATION PERMET DE QUANTIFIER LES COEFFICIENTS DES BLOCS DCT DE FACON OPTIMALE PAR RECOURS A DES MATRICES D'ALLOCATION DE BITS ADAPTEES. LE DEUXIEME SCHEMA, CONSISTE EN UNE SUPPRESSION DANS LES IMAGES TRANSFORMEES EN ONDELETTES DES BLOCS DE FAIBLE ENERGIE SUIVANT UN DECOUPAGE EN QUADTREE, LES COEFFICIENTS DES BLOCS NON ANNULES ETANT SEUILLES PUIS QUANTIFIES. EN SEQUENCES D'IMAGES, NOUS AVONS DISTINGUE LES CAS DE LA DECOMPOSITION 2D ET 3D. LE CAS DE LA DECOMPOSITION 2D CONDUIT A DEUX TYPES D'ALGORITHMES DE CODAGE SUIVANT LE MODE D'APPLICATION DE L'ALGORITHME D'ESTIMATION ET DE COMPENSATION DU MOUVEMENT DANS LES BANDES FREQUENTIELLES. LE PREMIER TYPE INTITULE INTRA-BANDE SPATIALE VOIT L'ALGORITHME OPERER INDEPENDAMMENT DANS CHAQUE BANDE. LE SECOND TYPE S'APPLIQUE EN INTER-BANDES SPATIALES EN TRAITANT LE MOUVEMENT DANS LA SOUS-BANDE PASSE BAS UNIQUEMENT ET EN ETENDANT LES ESTIMATIONS RESULTANTES DANS LES AUTRES SOUS-BANDES DU MEME NIVEAU. LA DECOMPOSITION 3D CONDUIT A DEUX SOUS-SEQUENCES S#B ET S#H SUR LESQUELLES UNE APPLICATION DIRECTE DES APPROCHES INTRA-BANDE ET INTER-BANDE SPATIALES EST EFFECTUEE. UNE APPROCHE INTER-BANDES SPATIO-TEMPORELLES EST EGALEMENT TESTEE; ELLE CONSISTE A EFFECTUER UNE DETECTION ET UNE ESTIMATION DU MOUVEMENT DANS LES SOUS-IMAGES PASSE-BAS DE LA SOUS-SEQUENCE S#B UNIQUEMENT. LEURS RESULTATS SONT UTILISES POUR LE CODAGE NON SEULEMENT DE S#B MAIS EGALEMENT DE S#H ET CE, DE FACON INTER-BANDES SPATIALES. LES RESULTATS OBTENUS MONTRENT LA SUPERIORITE DES APPROCHES INTER-BANDES QUI CONDUISENT A DE BONNES QUALITES DE RECONSTRUCTION AVEC DES DEBITS DANS LE CADRE DE LA TRANSMISSION DE SEQUENCES MONOCHROMES, INFERIEURS A 1 BIT/POINT
Author: P. Lobel
Publisher:
ISBN:
Category :
Languages : en
Pages : 56
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Book Description
Author: Pierre Francus
Publisher: Springer Science & Business Media
ISBN: 9781402020612
Category : Technology & Engineering
Languages : en
Pages : 348
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Book Description
This is a guide to imaging techniques for sedimentologists, paleolimnologists, paleoceanographers and microscopists involved in paleoenvironmental reconstruction. Case studies illustrate the range of information obtainable from different sediments (marine, lacustrine, aeolian) and different types of samples (cores, embedded blocks, microscopic slides) using different regions of the electromagnetic spectrum (visible, UV, IR, X-ray). Includes comprehensive protocols, guidelines, and recommendations for the use of low cost image analysis techniques.
Author: Vladimir I︠A︡kovlevich Katkovnik
Publisher: SPIE-International Society for Optical Engineering
ISBN:
Category : Computers
Languages : en
Pages : 584
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Book Description
This book deals with a wide class of novel and efficient adaptive signal processing techniques developed to restore signals from noisy and degraded observations. These signals include those acquired from still or video cameras, electron microscopes, radar, X-rays, or ultrasound devices, and are used for various purposes, including entertainment, medical, business, industrial, military, civil, security, and scientific. In many cases useful information and high quality must be extracted from the imaging. However, often raw signals are not directly suitable for this purpose and must be processed in some way. Such processing is called signal reconstruction. This book is devoted to a recent and original approach to signal reconstruction based on combining two independent ideas: local polynomial approximation and the intersection of confidence interval rule.
Author: Paul M. Gauthier
Publisher: Springer Science & Business Media
ISBN: 9401109346
Category : Mathematics
Languages : en
Pages : 565
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Book Description
Proceedings of the NATO Advanced Study Institute and Séminaire de mathématiques supérieures, Montréal, Canada, July 26--August 6, 1993
Author: Alex M. Dopico
Publisher: Springer Science & Business Media
ISBN: 1588296628
Category : Medical
Languages : en
Pages : 1265
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Book Description
This book presents a compendium of methodologies for the study of membrane lipids, varying from traditional lab bench experimentation to computer simulation and theoretical models. The volume provides a comprehensive set of techniques for studying membrane lipids with a strong biophysical emphasis. It compares the various available techniques including the pros and cons as seen by the experts.
Author: Jean-Luc Starck
Publisher: Cambridge University Press
ISBN: 1107088062
Category : Computers
Languages : en
Pages : 449
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Book Description
Presents state-of-the-art sparse and multiscale image and signal processing with applications in astronomy, biology, MRI, media, and forensics.
Author: Jean-Luc Starck
Publisher:
ISBN: 9780511728877
Category : Electronic books
Languages : en
Pages : 316
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Book Description
Presents the state of the art in sparse and multiscale image and signal processing.
Author: K. Hadjiivanov
Publisher: Heron Press
ISBN: 9789545802393
Category : Technology & Engineering
Languages : en
Pages : 391
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Book Description
