Search results for "numérisation"
showing 10 items of 14 documents
Integration of high resolution spatial and spectral data acquisition systems for monitoring purposes in cultural heritage applications
2013
The concern and interest of this PhD thesis is the registration of featureless 3D and multispectral datasets describing cultural heritage objects.In this context, there are few natural salient features between the complementary datasets, and the use of targets is generally proscribed.We thus develop a technique based on the photogrammetric tracking of the acquisition systems in use.A series of simulations was performed to evaluate the accuracy of our method in three configurations chosen to represent a variety of cultural heritage objects.These simulations show that we can achieve a spatial tracking accuracy of 0.020 mm and an angular accuracy of 0.100 mrad using four 5 Mpx cameras when dig…
« Recyclages audiovisuels dans le documentaire de création contemporain »
2022
La numérisation à grande échelle et la mise en ligne des fonds d’archives filmiques, la prolifération d’images sur internet, notamment depuis l’apparition de YouTube en 2005, ou encore les techniques numériques de traitement des images ont favorisé l’essor des films de found footage –littéralement enregistrements ou images trouvés–, une modalité qui est devenue une tendance marquante du documentaire contemporain. Certaines de ces œuvres, parfois constituées intégralement d’images de « seconde main » (Blümlinger, 2013), au-delà de la reconnaissance critique et de l’intérêt des chercheurs, ont connu le succès en salles ou sur les plateformes et ont été projetées et récompensées dans les festi…
« La donnée et le périodique »
2022
Numérisation et données des périodiques britanniques
"Introduction¨, Histoire documentaire du communisme,
2017
National audience
Trois algorithmes intelligents pour la numérisation 3D automatique d'objets inconnus
2013
National audience; Ce papier propose trois approches itératives et intelligentes de planification de vue pour la numérisation 3D d'objets sans connaissance a priori de leurs formes. La première méthode est une approche simple et naïve basée sur la génération d'un ensemble de points de vues par échantillonnage régulier de l'enveloppe englobante des données acquises. La deuxième méthode est basée sur une analyse de l'orientation des différentes parties acquises. La troisième méthode vise à explorer les parties de l'objet qui figurent dans la limite du champ de visibilité et est basée sur un couplage de la visibilité angulaire avec la visibilité réelle par lancer de rayons. Les résultats de nu…
Automatic production of three-dimensionnel models by 3D digitization
2012
The manual 3D digitization process is expensive since it requires a highly trained technician who decides about the different views needed to acquire the object model. The quality of the final result strongly depends, in addition to the complexity of the object shape, on the selected viewpoints and thus on the human expertise. Nowadays, the most developed digitization strategies in industry are based on a teaching approach in which a human operator manually determines one set of poses for the ranging device. The main drawback of this methodology is the influence of the operator's expertise. Moreover, this technique does not fulfill the high level requirement of industrial applications which…
Compte rendu de : Anne Both, Le Sens du temps. Le quotidien d’un service d’archives départementales, préface de Christian Hottin, Toulouse, Anacharsi…
2017
International audience
Knowledge engineering and semantic formalism of symbolic relations. From medieval network to web 3.0
2020
A search has always been at the center of human concerns, the one of conditions and means to represent, to control well, and to communicate effectively with his environment. While technological advances and electronic gadgets such as smartphones, the Web, and online social networks currently allow addressing this concern, it has not always been the case. Our works in this thesis treat medieval documents considered as a medium of communication and as a model of the social network in the Middle Ages. These documents are called medieval illuminations. They were luxurious paintings used in that time to represent the environment and ideal world for elites such as prince, duke, etc. Those paintin…
Automation of Acquisition and Post-processing for 3D Digitalisation
2009
The automation of digitalisation is an indispensable step in the development of 3D measuring, in various fields :- in industry, to accelerate the procedures for control of parts,- in archaeology and biology, for the study of collections of several hundreds even thousand objects (for which the acquisition is for the moment impossible because of necessary time, and thus of the cost). In this thesis, we explain first the various existing systems of acquisition and positioning, by detailing the advantages and the inconveniences of every system. We present then the developed methodology to guide the operator in these choices as well as the tool set up to formalize this methodology. Then we will …
3 D digitization of specular metallic surfaces by means of infrared imaging
2012
For the past twenty years, the need for three-dimensional digitization of manufactured objects has increased significantly and consequently, many experimental techniques and commercial solutions have been proposed. However, difficulties remain for the acquisition of optically non cooperative surfaces, such as transparent or specular ones. Since the working principle of conventional scanners is based on the acquisition of the diffuse part of the reflection, transparency and specular reflections may cause outliers. To address highly reflective metallic surfaces, we propose the extension of a non conventional technique that was originally dedicated to glass objects, called “Scanning from Heati…