SAR 05 - Loi de Rayleigh, notions sur le filtrage

with Jean-paul Rudant

28m 47s Beginner Published on: 19 April 2018
Category: SAR RADAR French English French, English


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 Origine du chatoiement (speckle), successivement dans le cas d’un pixel contenant 1 cible, puis 2 cibles, puis un grand nombre de cibles. Variabilité de la réponse en amplitude pour une zone homogène, présentation de la loi de probabilité de Rayleigh, coefficient de variation (écart type sur moyenne) sur un voisinage de pixel. Filtrage par moyennage simple ou filtre adapté. Effet du filtrage sur le coefficient de variation. Nombre de vues.

Matériels provenant d'un cours de théorie SAR organisé par l'ESA et presenté par le prof. J-P. Rudant.

 Origin of the speckle, successively in the case of a pixel containing 1 target, then 2 targets, then a large number of targets. Variability of the amplitude response for a homogeneous zone, presentation of the Rayleigh law, coefficient of variation (standard deviation on average) on a neighboring pixel. Simple averaging filter or matched filter. Effect of filtering on the coefficient of variation. Number of views.

Materials derived from a SAR Basic Theory Course organised by ESA and given by prof. J-P. Rudant. 


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