Dissertations / Theses on the topic 'Séquence numérique'
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Lefèvre, Sébastien. "Détection d'évènements dans une séquence vidéo." Tours, 2002. http://www.theses.fr/2002TOUR4023.
Full textHere we are concerned by multimedia data indexing by use of pertinent sample searching. Our work focuses on video sequence analysis in order to detect some predefined events. This search being contextual, we propose an architecture and some rapid tools, both generic, for building specific indexing systems. We deal in particular with the following problems : data temporal segmentation, background and object separation, background structure extraction, object tracking (rigid or non-rigid objects, with or without learning) and audio data analysis. In order to solve these different problems, the generic tools we are proposing are based on semi-local analyses, multiresolution approaches, hidden Markov models, and the active contour method. The architecture and the tools introduced here have been validated through several applications
Buisson, Olivier. "Analyse de séquence d'images haute résolution : application à la restauration numérique de films cinématographiques." La Rochelle, 1997. http://www.theses.fr/1997LAROS016.
Full textBouder, Céline. "Estimation, en contexte non coopératif, des paramètres d'une transmission à spectre étalé par séquence directe." Brest, 2001. http://www.theses.fr/2001BRES2016.
Full textMarchandon, Mathilde. "Vers la compréhension des séquences sismiques sur un système de failles : de l’observation spatiale à la modélisation numérique. Application à la séquence du Nord-Est Lut, Iran." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4055/document.
Full textMany studies show that static and postseismic stress transfers play an important role in the occurrence of seismic sequences. However, a large majority of these studies involves seismic sequences that occurred within fault systems having simple geometric configurations (e.g. collinear or parallel fault system). In this thesis, we study a seismic sequence that occurred within a complex fault system (i.e. conjugate fault system), the NE Lut seismic sequence (1939-1997, NE Iran), in order to assess if (1) stress transfers can explain the succession of earthquakes in the sequence and (2) stress transfers can lead to the synchronization of the NE Lut faults over multiple seismic cycles. To this end, we first measure the surface displacement field produced by the sequence in order to precisely constrain the stress transfer modeling afterwards. We use optical correlation technique to measure the surface displacement fields of the Khuli-Boniabad (Mw 7.1, 1979) and Zirkuh earthquake (Mw 7.2, 1997). We find that these earthquakes broke several segments limited by geometrical complexities of the faults. We interpret the differences in failure style of these earthquakes (i.e. rupture length, mean slip and number of broken segments) as being due to different level of structural maturity of the Dasht-e-Bayaz and Abiz faults. Furthermore, we succeed to detect offsets produced by the 1979 Mw 6.6 Korizan earthquake. It is the first time that surface displacements for such a small historical earthquake have been measured using optical correlation. Then, combining previously published intermediate-field InSAR data and our near-field optical data, we estimate a new source model for the Zirkuh earthquake (Mw 7.2, 1997). We show that near-field data are crucial to better constrain the fault geometry and the slip distribution at depth. According to our source model, the Zirkuh earthquake broke three asperities separated by geometrical barriers where aftershocks are located. No shallow slip deficit is found for the overall rupture except on the central segment where it could be due to off-fault deformation in quaternary deposits. Finally, we use the information acquired in the first parts of this work to model the stress transfers within the NE Lut sequence. We find that 7 out of 11 earthquakes are triggered by the previous ones and that the precise modeling of the rupture geometry is crucial to robustly estimate the stress transfers. We also show that the Zirkuh earthquake is mainly triggered by the moderate earthquakes of the NE Lut sequence. Lastly, the simulation of multiple seismic cycles on the NE Lut fault system shows that stress transfers, in particular postseismic stress transfers due to viscoelastic relaxation, enhance the number of seismic sequences and synchronize the rupture of the faults. The simulations also show that the order in which the Mw>7 earthquakes occurred during the NE Lut sequence is quite exceptional
Robert, Xavier. "Séquence d'activité des failles et dynamique du prisme himalayen : apports de la thermochronologie et de la modélisation numérique." Phd thesis, Université Joseph Fourier (Grenoble), 2008. http://tel.archives-ouvertes.fr/tel-00352596.
Full textLebamba, Judicael. "Relation pollen-végétation-climat actuels en Afrique centrale : une approche numérique appliquée à la séquence quaternaire du lac Barombi Mbo, Cameroun." Montpellier 2, 2009. http://www.theses.fr/2009MON20203.
Full textThis work presents the analysis of 80 new modern pollen samples from central Africa, mainly in forest environment. Complemented by pollen assemblages previously obtained in this region, i. E. A total of 199 assemblages, statistical analysis and the application of the biomisation method have allowed to test the reliability of the pollen content of this dataset compared to local botanical data, showing that potential biomes (tropical rain forest, tropical seasonal forest, savanna) and forest successional stages (savanna, secondary forest, mature forest) were reconstructed with more than 95% of confidence level. Based on a more extended pollen database toward drier vegetations from West Africa and using the biomisation method, the best analogues and the artificial neural networks techniques, we proposed new quantitative and more precise reconstructions of the vegetation and climate at Lake Barombi Mbo, in Cameroon, during the last 33,000 cal yrs BP
Satthumnuwong, Purimpat. "Approche expérimentale et numérique de la rupture des assemblages collés de composites stratifiés." Thesis, Dijon, 2011. http://www.theses.fr/2011DIJOS052/document.
Full textAdhesive bonding of composite materials has undeniable advantages over other methods such as bolting or riveting. However, one of the difficulties encountered by designers is the prediction of the failure level and failure mode of these adhesively bonded assemblies. In the case of composite laminates, one of the factors acting on the bonded joint behaviour is the stacking sequence, but works presented in the literature do not separate global effects (membrane and bending stiffness modification) and local effect (ply orientation near the adhesive layer). This study deals with the characterization of such effects in the case of single lap joints of carbon/epoxy laminates. In order to isolate the local effects, specific quasi isotropic quasi homogeneous stacking sequences are used. When stiffness properties are maintained constant, strength variations of more than 30 % are observed. Tests performed with a symmetric laminate with bending anisotropy show that the bending stiffness plays also an important role in the joint behaviour. Closed form models are able to predict global effects with a good accuracy but are inappropriate when local effects occur. The use of finite element models can account for these phenomena, by explicitly modelling the laminate plies near the adhesive layer and introducing delamination between these plies with a cohesive zone model. This model is used to perform a parametric study of the joint geometry and to produce a failure envelope according to the orientation of the loading
Bornot, Aurélie. "Analyse et prédiction de la relation séquence - structure locale et flexibilité au sein des protéines globulaires." Phd thesis, Université Paris-Diderot - Paris VII, 2009. http://tel.archives-ouvertes.fr/tel-00583885.
Full textGuimarães, Silvio Jamil Ferzoli. "Identification de transitions dans des séquences d'images vidéo basée sur l'analyse d'images 2D." Marne-la-Vallée, 2003. http://www.theses.fr/2003MARN0163.
Full textThe video segmentation problem consists in the identification of the boundary between consecutive shots in a video sequence. The common approach to solve this problem is based on the computation of dissimilarity measures between frames. In this work, the video segmentation problem is transformed into a problem of pattern detection, where each video event is represented by a different pattern on 2D spatio-temporal image, called visual rhythm. To cope with this problem, we consider basically morphological and topological tools that we use in order to identify the specific patterns that are related to video events such as cuts, fades, dissolves and flashes. To compare different methods we define two new measures, the robustness and the gamma measures. In general, the proposed methods present the quality measures better than the other methods used to comparison
Venegas, Martinez Santiago. "Analyse et segmentation de séquences d'images en vue d'une reconnaissance de formes efficace." Paris 5, 2002. http://www.theses.fr/2002PA05S002.
Full textThis work presents a computational technique for tracking moving interfaces. For that, a vecursive linear convolving method to performe arisotropic diffusion in images is presented. The novel approach is that there is not need to estimate local and global properties previously of the concerned evolving interface. The method works on a fixed grid, usually the image pixels grid, and automatically handles changes in the topology of the evolving interface
Arcila, Romain. "Séquences de maillages : classification et méthodes de segmentation." Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00653542.
Full textLiu, Ming. "Analyse et optimisation du système asiatique de diffusion terrestre et mobile de la télévision numérique." Phd thesis, INSA de Rennes, 2011. http://tel.archives-ouvertes.fr/tel-00662247.
Full textDrouin, Stéphane. "Description incrémentale d'objets déformables dans des séquences vidéo." Thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25393/25393.pdf.
Full textSanchez, Olivia. "Désoccultation de séquences vidéo : aspects mathématique et numérique." Paris 9, 2002. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2002PA090019.
Full textBoulfani-Cuisinaud, Yasmine. "Compression au fil de l'eau de séquences de maillages 3D par analyse multirésolution." Nice, 2010. http://www.theses.fr/2010NICE4080.
Full textWe propose in this thesis two approaches for geometric compression of 3D dynamic meshes computing on the fly multiresolution analysis. As a first compression approach, the encoder TWC (Temporal wavelet Coding) is proposed, including a temporal wavelet transforms implemented by several lifting schemes. The subbands of the wavelet transforms are encoded thanks to a bit allocation giving the optimal quantization steps, by optimizing the rate-distorstion trade-off. A second compression approach is proposed, called MCTWC (Motion Compensated Temporal Wavelet Coding). It is based on the motion compensated wavelet transform. An automatic motion-based segmentation technique is proposed using z region growing approach : the vertices that follow the same affine motion belong to a same cluster. A motion estimation / compensation is then applied to each cluster of the partition to obtain a cluster-based motion compensation sequence. Then, a wavelet-based lifting scheme is applied. Experimentally, the encoder MCTWC including motion compensation improves significantly the compression performances compared to the encoder TWC which does not include this feature. Also, compared to some state of the art encoders, the proposed coders do not depend on the geometric characteristics of the mesh sequences, permit a low computational complexity multiresolution analysis, and offer features like temporal scalability and streaming
El, Hassani Mohammed. "Segmentation basée-région pour l’amélioration de séquences vidéo : Algorithme-Architecture dans un contexte temps réel." Caen, 2008. http://www.theses.fr/2008CAEN2023.
Full textThe expression image improvement in the field of digital video indicates all the techniques which can modify the contents of a video sequence for a better visual rendering. These techniques can modify not only the contents of an image, but also its dimensions and its display rate. During the last ten years, the manufacturers of Set Top Boxes began to integrate more and more algorithms to improve the video rendering in their products. However, most of the adopted solutions use a pixel representation of the image. In this thesis we suggest to take benefit of a region representation of the image in order to optimize the improvement of the video rendering. Our thesis is then related to three domains: video improvement algorithms, material implementation and segmentation algorithms. After a state of the art on these three domains, we are going to design a video segmentation algorithm with a good temporal consistency between the successive images. As the video segmentation is a bottleneck for real time processing, our design is simplicity driven. We implement the TCVSEG on a programmable architecture whose choice is justified. After the evaluation of this first implementation, we study the parallelization of our spatial segmentation to accelerate the processing for video sequences of resolution higher than CIF. Then we propose image improvements methods exploiting the region representation of the image. Finally we give perspectives to improve the performances and the quality of our video segmentation as well as improvements which exploit also the region representation of the image
Monier, Garbet Pascale. "Amplification de rayonnement XUV dans les plasmas créés par laser : étude d'un schéma combiné d'excitation optique et collisionnelle dans les ions isoélectroniques du néon." Paris 11, 1987. http://www.theses.fr/1987PA112090.
Full textXUV radiation emitted by laser produced plasmas may, under particular conditions, be amplified by the medium, leading to a laser effect in this short wavelength range (100 - 200 Å). This work is intended to study the feasibility of a new population inversion scheme in neon-like strontium, combining collisional excitation and quasi resonant photoexcitation by aluminium radiation at 6. 059 Å. A detailed spectroscopic analysis of the strontium plasma near 150 Å has made possible the identification of the neon-like lines which are expected to be amplified. Quasi-resonant X-ray absorption of aluminium radiation by strontium is demonstrated in a two plasmas experiment. Gain is calculated as a function of the plasma conditions and of the resonant photoexcitation rate coefficient, using a detailed collisional-radiative model, SPHINX. Population transfers due to photon and collisional processes are carefully studied. At the same time, gains computed from SPHINX in strontium and in the collisional excitation scheme alone, are compared to experimental values observed at the Lawrence Livermore National Laboratory on the same transitions in selenium. A very good qualitative agreement is found for both transitions located at 164. 08 Å and 166. 49 Å in strontium
Chatelain, Clément. "Extraction de séquences numériques dans des documents manuscrits quelconques." Phd thesis, Université de Rouen, 2006. http://tel.archives-ouvertes.fr/tel-00143090.
Full textMegret, Rémi. "Structuration spatio-temporelle de séquences vidéo." Lyon, INSA, 2003. http://theses.insa-lyon.fr/publication/2003ISAL0089/these.pdf.
Full textThis thesis tackles the problem of extracting a spatio-temporal structure out of a video sequence. The goal is to provide a structured representation of the visual content, by taking into account the whole spatio-temporal extent of the sequence, spatially as well as temporally. Several points of view are proposed to address this issue: - a representation based on trajectories of blobs, - a segmentation method that works jointly in space and time, - and a more general formalization that builds around the concept of recursive grouping. These approaches share the properties that we consider multi-level representations, by use of hierarchical structures. They are based on pixel groupings that have a compact shape, like blobs in images, and strands in video sequences
Wang, Shan. "Stratégie de codage conjoint de séquences vidéo basé bandelettes." Poitiers, 2008. http://theses.edel.univ-poitiers.fr/theses/2008/Wang-Shan/2008-Wang-Shan-These.pdf.
Full textThe work of this thesis relies on image compression as well as digital communications. The image processing is applicable in a lot of communication-related fields like medical imaging, telemedicine, videoconference, cinema and TV. The digital transmission systems assure the information exchanges between a source and a receiver. Considering that the physical medium used to support such transmission is not yet perfect, it is well known that the information transmitted can be exposed to several types of interference, resulting errors at the receiver. Furthermore, the communication system itself can cause errors. For the sake of performance, many image transmission systems analyze the flaws of the human visual perception. In addition, we also take into account all the elements of the digital communication channel in order to have a robust scheme in difficult transmission conditions as well as in low bandwidth channel. To this end, we propose to use wavelet decomposition (DWT) in the context of wireless video transmission, which is different from actual standards using DCT in priority like MPEG-4,. 264, AVC, …. This guarantees more flexibility in the possible hierarchisation for the information to be coded. In fact, using different applications and network types in a communication system, the quality of service at the receiver can be very variable. In addition to spatial compression, the compression rate can also be increased using GOP (Group of Pictures) techniques and motion compensation (Motion Vectort) to exploit the similarities between successive images. In order to have a coding system more robust, we’ve used vector quantizations from codebooks built with self-organizing maps (SOM algorithm), these codebooks can be superimposed on constellations of quadrature amplitude modulation (QAM). The following fix length coding reduces the compression rate but preserves better the transmitted data facing channel errors
Fiot, Céline. "Extraction de séquences fréquentes : des données numériques aux valeurs manquantes." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2007. http://tel.archives-ouvertes.fr/tel-00179506.
Full textEl, Hassouni Mohammed. "Débruitage de séquences vidéo en présence de perturbations fortement impulsives." Dijon, 2005. http://www.theses.fr/2005DIJOS004.
Full textDumont, Émilie. "Similarité des séquences vidéo : application aux rushes." Nice, 2009. http://www.theses.fr/2009NICE4021.
Full textThe purpose of this document is video analysis and in particular analysis of video rushes. In filmmaking, rushes is the term used to describe the raw, unedited, footage shots which are created during the making of a motion picture. We propose several tools to explore rushes. The first one is a tool to remove redundancy : the redundancy can be absolute (i. E. The content is not needed) or relative (i. E. The content is repetitive). An other method is a shot video search using a visual dictionary based on the paradigm of textual document search. In order to create video summarization, we propose a method to represent the quantity of the relevant visual content of a video sequence. A second technique is to align repetitive video sequences in order to parse the video and remove repetitive takes. At the same time, we present a collaborative architecture allowing to fuse different partner analysis in order to exploit their different competences. These systems were evaluated by TRECVID. Results encouraged us to continue on this direction. The main problem is that the TRECVID evaluations are currently performed by human judges. This creates fundamental difficulties because evaluation experiments are expensive to reproduce, and subject to the variability of human judgment. Therefore, we propose an approach to automate this evaluation procedure using the same quality criteria. Through experiments, we show a good correlation with the manual evaluation
Guo, Xiao Yong. "Méthodes numériques pour l'acquisition du synchronisme d'une séquence pseudo-aléatoire dans un système de télécommunications par étalement de spectre à séquence directe." Toulouse, ENSAE, 1990. http://www.theses.fr/1990ESAE0019.
Full textChebaro, Bilal. "Etude du mouvement 3D d'objets par l'analyse d'une séquence stéréoscopique d'images." Toulouse 3, 1993. http://www.theses.fr/1993TOU30195.
Full textPelletier, Sylvain. "Modèle multi-couches pour l'analyse de séquences vidéo." Paris 9, 2007. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2007PA090029.
Full textWe propose to study in this thesis the layer model and its applications to video analysis. According to this model, a video sequence is obtained by the projection of a three dimensional scene composed of several opaque objects located at different depths from the camera. The background is the last layer, and the moving objects are projected upon it, in order opposite of their depth. In the first chapter, we set forth a real-time video segmentation method based upon the layer model. Given a known background and a fixed camera, we compare the current frame and the background, detecting the occluded zones. Likewise we use a contrario detection to detect moving objects as meaningful clusters of changes. In Chapter 2, we look for reconstruction of layers from the video. We propose a deformation model of the objects' projection on the image, valid under some hypothesis on the objects' movement. Chapter 3 proposes a variational method to extract moving object layers from the sequence, even if these are hidden during several images
Reiser, Cyrille. "Identification des corps sédimentaires et des séquences stratigraphiques par l'analyse numérique des formes diagraphiques." Lyon 1, 1998. http://www.theses.fr/1998LYO10175.
Full textMaurel, Hervé. "Rendu réaliste de séquences animées : le lancer de rayons 4D." Toulouse 3, 1994. http://www.theses.fr/1994TOU30020.
Full textPerret, Yannick. "Suivi de paramètres de modèle géométriques à partir de séquences vidéo multi-vues." Lyon 1, 2001. http://www.theses.fr/2001LYO10276.
Full textThomas, Dave. "Simulation des séquences de sciage du bois par des modèles logiques et numériques." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0011/MQ33764.pdf.
Full textKone, Tiémoman. "Recalage automatique d'images angiographiques rétiniennes par analyse numérique d'images : application au suivi de séquences d'images." Paris 12, 1993. http://www.theses.fr/1993PA120046.
Full textDjemal, Khalifa. "Segmentation par contour actif et suivi automatique d'un objet dans une séquence d'images." Toulon, 2002. http://www.theses.fr/2002TOUL0017.
Full textLeclercq, Thomas. "Contribution à la comparaison de séquences d'images couleur par outils statistiques et par outils issus de la théorie algorithmique de l'information." Lille 1, 2006. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2006/50376-2006-Leclercq.pdf.
Full textBourdon, Pascal. "Restauration d'images et de séquences d'images par EDP : contributions et applications en communications numériques." Poitiers, 2004. http://www.theses.fr/2004POIT2321.
Full textThis PhD research focuses on image processing in digital communications. A transmission system is a system that transmits information from one place to another through a physical path. Because this path is subject to interference and propagation disturbances, errors can occur during the reception. Additional errors may also be generated by the system itself. In order to achieve better performances, most image coding standards exploit perceptual properties of the human visual system to remove data from the source, thus introducing distortion. In this dissertation, we study and conceive several PDE (Partial Differential Equations)-based models for image restoration, so to attenuate visual impact of these errors. In particular we propose a new image sequence denoising model, as well as a multiresolution inpainting method. Current applications include compression artifacts removal and error correction on JPEG/MPEG/H. 26x images/sequences, and on a joint source/channel coding scheme as well
Parshyn, Viachaslau. "Macro-segmentation sémantique des séquences multimédia." Ecully, Ecole centrale de Lyon, 2006. http://bibli.ec-lyon.fr/exl-doc/vparshyn.pdf.
Full textSegmentation of video into temporal semantic units provides important indexing information for efficient content-based browsing and navigation. In this work we are concerned withe the problem of macro-segmentation aiming at automatic generating of content tables of videos. We propose a deterministic approach which is a sort of finite automation and allows one to formulate content parsing rules based on a priori knowledge of the video production principles. The approach has been adopted und tested on tennis video. We propose also a statistical segmentation framework where content parsing rules are chosen so as to optimize the system performance measured as recall and precision. The framework is applied to the task of film segmentation into semantic scenes. The higher segmentation performance has been shown with respect to conventional rule-based ans statistical methods. In this work we are also concerned with the problem of automatic video summarization
Agnus, Vincent. "Ségmentation spatio-temporelle de séquences d'images par des opérateurs de morphologie mathématique." Université Louis Pasteur (Strasbourg) (1971-2008), 2001. http://www.theses.fr/2001STR13197.
Full textLe, Men Camille. "Segmentation Spatio-temporelle d'une séquence d'images satellitaires à haute résolution." Phd thesis, Ecole nationale supérieure des telecommunications - ENST, 2009. http://pastel.archives-ouvertes.fr/pastel-00658159.
Full textKhorrami, Zeinab. "Imagerie à haute résolution des amas R136 et NGC3603 dévoilent la nature de leurs populations stellaires." Thesis, Nice, 2016. http://www.theses.fr/2016NICE4030/document.
Full textThis thesis aims at studying 2 massive clusters NGC3603 and R136, and the mechanisms that govern their physics, These clusters host the most massive stars known in the local universe so far and are important clues to understand the formation and fate of very massive star clusters. The manuscript outlines the photometric analysis of the core of R136 and NGC3603 on the basis of HST data in the visible and the VLT high dynamic imaging that I obtained in the infrared thanks to the SPHERE focal instrument operated since 2015 and its extreme Adaptive Optics, In an extensive photometric study of these data I discovered a significantly larger number of faint low-mass stars in the core of both these clusters compared to previous works. These stars are often detected in the vicinity of known massive bright objects. By comparing HST and SPHERE measures, NGC3603 does not show any signature of mass segregation in its core since the MF slope of the very core and the next radial bin are similarly flat and agree well with the MF found in previous works of the outer regions. On the other hand R136 is partially resolved using the SPHERE/IRDIS mode with most of the massive stars having visual companions. Considering the spectroscopic and photometric errors on the extinction and the age of cluster members, I estimate a mass range for each detected star. The MF is plotted at different ages with given errors on stellar masses. Finally I demonstrate that we need more resolution to go further on studying R136 which is 7-8 times further than NGC3603
Piriou, Gwenaëlle. "Modélisation statistique du mouvement dans des séquences d'images pour la reconnaissance de contenus dynamiques." Rennes 1, 2005. http://www.theses.fr/2005REN1S092.
Full textAurengo, André. "Analyse factorielle des séquences d'images en médecine nucléaire." Paris 11, 1989. http://www.theses.fr/1989PA112413.
Full textBeust, Hervé. "Dynamique interne du disque protoplanétaire autour de l'étoile beta Pictoris." Phd thesis, Université Paris-Diderot - Paris VII, 1991. http://tel.archives-ouvertes.fr/tel-00725138.
Full textBaroutsaki-Tsirigoti, Sofia. "La littérature au service de l'interculturalité dans la classe de FLE en Grèce et l'apport des nouvelles technologies." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUL087.
Full textAlthough language didactics, in this case FLE (French as a foreign language), pedagogical sciences, research in didactic literature and the Common European Framework of Reference for Languages promote literature in the language course as “a clearly identifiable, clearly delimited object” (Schneuwly B., 1998, p. 270 sq.), this does not mean that it is fully integrated. As such, literary texts are envisioned as one of the type of documents which can be used in languages teaching and their usage serves several purposes, described in the descriptors of the Common European Framework of Reference for Languages. The place of literature in didactics of French as a foreign language is ambiguous and the frequency of the use of literary text in language classes does not seem to be preferred according to the findings of the researchers and the reactions of the Greek teachers interviewed for this study. The exploitation of literary texts can be achieved in an aesthetic way by direct contact with the work, in an artistic way through the awakening of the senses, and in a symbolic way through critical analysis. Among all this, the particularly delicate but fundamental dimension of intercultural education resurfaces as a way of connecting languages and cultures in the perspective of a changing world. This research, carried out in a Greek context, aims to propose a new approach to literary teaching in FLE classroom. Indeed, the advocated approach proposes the exploitation of literature with pragmatic dimensions of communication involving linguistic knowledge, know-how and socio-cultural know-how. The discussion focuses on “the ability to understand and be understood in the language in question” (Porcher L. and Groux D., 1998, p. 7), on the release of the language skills of learners. Its specificity is built on complex forms of mediatization and mediation of the digital sequence “Victor Hugo: a man, a story” acting on the five facets of learning: information, motivation, activities, interaction, production. The aim is to combine the teaching and learning of the FLE and the deployment of intercultural training in support of literature through an interactive process in a cultural context shifting in the digital age. The feasibility and relevance of the use of literary texts and the exploration of literary fact through this hybrid approach to literature as “life science” are studied. The linking of the framework of the references of this study, the didactic proposal, its practice in the FLE classroom with the results obtained and their analysis, makes it possible to outline the contributions of such practices to the Greek situation of the learning of the FLE which could advance didactic reflections more generally. Literature and information culture come together in this progressive education, depending on the level of language (B2-C1 of the CECRL), the knowledge acquired, and the objectives set, while advancing the linguistic, cultural, and intercultural aspects
Tu, Xiao-Wei. "Détection et estimation des objets mobiles dans une séquence d'images." Compiègne, 1987. http://www.theses.fr/1987COMPD063.
Full textBenkemoun, Nathan. "Contribution aux approches multi-échelles séquencées pour la modélisation numérique des matériaux à matrice cimentaire." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2010. http://tel.archives-ouvertes.fr/tel-00657311.
Full textVila, Jean-Louis. "Filtrage d'ordre directionnel adaptatif : application aux autoradiographies de séquences d'A. D. N." Chambéry, 1995. http://www.theses.fr/1995CHAMS007.
Full textNicolas, Yannick. "Construction de représentations 3D compactes de séquences vidéo pour la navigation à distance dans des scènes tridimensionnelles." Rennes 1, 2002. http://www.theses.fr/2002REN10016.
Full textChebbo, Salim. "Méthodes à compléxite réduite pour amélioration de la qualité des séquences vidéo codées par blocks." Paris, Télécom ParisTech, 2010. http://www.theses.fr/2010ENST0026.
Full textThe objective of this thesis is to propose real time solutions in order to reduce the video compression impairments namely the blocking, the ringing and the temporal flickering. The proposed deblocking filter is mainly based on an adaptive conditional two-dimensional filter, derived from the combination in horizontal and vertical directions of a simple two-mode conditional 1-d filter. Appropriate filters are selected using the local degradation of the image, which is assessed by examining he quantization step as well as the computed spatial pixel activities. The ringing artifact reduction algorithm uses a simple classification method to differentiate at and edge blocks, which are then filtered using a particular weighted median filter. Regarding the temporal impairments, we proposed a new measure to assess the level of these impairments and accordingly estimate the temporal quality of the decoded sequences. The preliminary study of the temporal compression artifacts demonstrated that the level of the temporal fluctuation between consecutive frames is affected by the compression ratio and the group of pictures structure, notably the presence (and period) of intra coded frames in the video sequence. It was also shown that the deringing process reduces the visibility of the mosquito noise, however a temporal filtering remains necessary to reduce the background areas fluctuation. For this reason, we proposed to temporally filter these areas and skip the temporal filtering of moving objects. Finally, the implementation complexity of the proposed solutions was investigated in order to prove the applicability of these solutions for real time applications
Joyeux, Laurent. "Reconstruction de séquences d'images haute résolution : application à la restauration de films cinématographiques." La Rochelle, 2000. http://www.theses.fr/2000LAROS042.
Full textFacon, Jacques. "Edosi : un système d'étude du déplacement d'objets à partir de séquences d'images." Compiègne, 1987. http://www.theses.fr/1987COMPD095.
Full textMadaoui, Hocine. "Prédiction structurale et ingenierie des assemblages macromoléculaires par bioinformatique." Paris 7, 2007. https://tel.archives-ouvertes.fr/tel-00553875.
Full textThe high-throughput characterization of the protein-protein interactions networks laid the bases for the first interaction maps in all model organisms, including human. In contrast, the structures of the protein assembles are still restricted to a very limited set of interactions. In this work, a specific evolutionary pressure that is exerted at protein interfaces has been revealed. To our knowledge, no such effect had been previously described. Based on this finding, a novel bioinformatic approach, called scotch (surface complementarity trace in complex history) has been developed to predict the structures of protein assembles. Coupled to a docking program, such as scotcher also developed in this work, this approach was shown to predict efficiently the structures of many complexes. This work also focuses on the inhibition of protein interactions by synthetic peptides, rationally designed on the basis of the complex structure. The results obtained for two examples, the asf1 - histone h3/h4 and the gp120 - cd4 complexes emphasize the high interest of rational design of complex interface for the development of novel therapeutic strategies