Research at RMA in the Evolving Context of Mine Action

The purpose of this chapter is to put the research of the Royal Military Academy (RMA) in mine action in a historical perspective by providing some background information. The vocabulary used in mine action and the landmine contamination problem are first presented. Formalisation of close‐in detection and of area reduction is then proposed. An overview of the research projects, the involved partners and the objectives as well as the list of PhDs performed at RMA are then provided. The chapter ends with an overview of the book and their link with the cited projects

An evaluation of pixel-based methods for the detection of floating objects on the sea surface

Ship-based automatic detection of small floating objects on an agitated sea surface remains a hard problem. Our main concern is the detection of floating mines, which proved a real threat to shipping in confined waterways during the first Gulf War, but applications include salvaging, search-and-rescue operation, perimeter, or harbour defense. Detection in infrared (IR) is challenging because a rough sea is seen as a dynamic background of moving objects with size order, shape, and temperature similar to those of the floating mine. In this paper we have applied a selection of background subtraction algorithms to the problem, and we show that the recent algorithms such as ViBe and behaviour subtraction, which take into account spatial and temporal correlations within the dynamic scene, significantly outperformthe more conventional parametric techniques, with only little prior assumptions about the physical properties of the scene

Contribution au traitement numérique des signaux multidimensionnels. Application à la restauration d'images

Doctorat en Sciencesinfo:eu-repo/semantics/nonPublishe

Etude sur des populations d'Agrostis tenuis Sibth. variation morphologique et ecotypes edaphiques.

The variation of 3 of the most obvious morphological characters distinguishing A. tenuis and A. stolonifera show 2 general trends. In some populations the variations of each character are mutually dependent, indicating the hybrid nature of the populations; this occurs in disturbed areas. In other populations the variations, more limited, of the same characters are independent and appear to be included in the normal range of variation of A. tenuis. Relative dwarfism is among natural populations conspicuously related to gross environmental factors (mainly drought) but this relation is in most occurrences only phenotypical. Edaphic ecotypes related to soil acidity, soil content in Ca or Mn are differentiated.-from English summarySCOPUS: ar.jinfo:eu-repo/semantics/publishe