Louis Laborelli

Learn More
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)
This paper proposes a method based on the Dempster-Shafer evidence theory for the detection of blotches in digitized archive film sequences. The detection scheme relies on the fusion of two uncorrelated fast, no motion compensated, spatio-temporal blotch detectors. The imprecision and uncertainty of both detectors are modeled using Dempster-Shafer evidence(More)
This paper introduces a novel method for improving blotch detection in digital film archive restoration, by using a high-level interpretation of false alarms, and an adaptive decision criterion, based on the a contrario decision theory. Blotch detection is performed using a bidirectional motion compensated SROD detector, and false alarms interpretation is(More)
This paper proposes a novel method based on Dempster–Shafer (belief function) theory for the detection of blotches in digitized archive film sequences. The detection scheme relies on the fusion of two uncorrelated blotch detectors, one working in the spatial domain and the other one in the temporal domain. The imprecision and uncertainty of both detectors(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)
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)
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)
  • 1