Traitement des réponses des capteurs magnétiques résonants

This paper shows the use of image processing routines in a timefrequency problem. The detected signals come from the variation with time of the frequency response of resonant sensors that are sensitive to magnetic field. The signatures of these sensors are traces in time-frequency space. Two treatments, dedicated to the methods used for the sensors responses detection, are presented ; these treatments allow real-time exploitation of signals : • Parabolic curves detection by using the Hough transformation. • Traces following on density image built with gaussian masks.