Jean-Hugues Chenot

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The ability to replace missing data in images and video is of key importance to many application fields. The general-purpose algorithm presented here is inspired by texture synthesis techniques but is suited to any complex natural scene and not restricted to stationary patterns. It has the property to be adapted to both still images and image sequences and(More)
Old analog television sequences suffer from a number of degradations. Some of them can be modeled through convolution with a kernel and an additive noise term. In this work, we propose a new blind deconvolution algorithm for the restoration of such sequences based on a variational formulation of the problem. Our method accounts for motion between frames,(More)
Inverse problems encountered in video processing often require to minimize criteria involving a high number of variables. Among available optimization techniques, proximal methods have shown their efficiency in solving large-scale possibly nonsmooth problems. When some of the proximity operators involved in these methods do not have closed form expressions,(More)
Programme 14h-14h30 Une nouvelle approche anthropocentrée de visualisation d'une couverture optimale de règles d'association guidée par la pertinence cognitive 3 Une nouvelle approche anthropocentrée de visualisation d'une couverture optimale de règles d'association guidée par la pertinence cognitive Résumé. La fouille visuelle des données est un nouveau(More)
Optimization methods play a central role in the solution of a wide array of problems encountered in various application fields, such as signal and image processing. Especially when the problems are highly dimensional, proximal methods have shown their efficiency through their capability to deal with composite, possibly nonsmooth objective functions. The(More)
This document sets out the requirements for a secure, sustainable digital repository – with special reference to digital audiovisual materials – and examines the technology and standards being developed to fulfil those requirements. It recommends " OAIS for datatape " as the needed (and missing) approach.
A contactless optical playing device for 78 rpm and 33 rpm lateral modulation phonographic discs, using structured colour illumination, is presented. An area of the disc is illuminated by a beam of rays, with colour depending on the direction of incidence, that are reflected by the groove wall towards a camera. In contrast with standard methods that measure(More)