Doctorate in signal processing

We compared different algorithms for the early detection of pressure ulcers and showed the need to take the measurement variation in time for a better detection. We showed that taking the evolution of pressure instead of only instantaneous measurement can improve the early detection of pressure ulcer.

Seed imbibition is an important process in plant biology by which a dry seed may turn into a developing organism. Monitoring the seed imbibition with non-invasive imaging techniques is therefore an important task. We described four different imaging techniques that address this task either in 3D or in 2D. Complete image analysis pipelines are then proposed to extract dynamic information on the imbibition process from such monitoring experiments.

We consider a quantum information processing task consisting in estimating the phase of a qubit. Estimation is analyzed in the presence of decoherence represented by a quantum thermal noise at arbitrary temperature. Regimes are found where higher noise temperatures turn more favorable to estimation. Such behaviors are related to stochastic resonance or antiresonance effects, where noise reveals beneficial to information processing.