|Mr. Maxime BOMBRUN
Function: Doctoral research fellow
Participation in ClerVolc program N°: 1
Main Research Unit: LIMOS
I am a ClerVolc doctoral student at the « Laboratoire Magmas et Volcans » (LMV) and « Laboratoire d’Informatique, de Modélisation et d’Optimisation des Systèmes » (LIMOS), both at the Blaise Pascal University in Clermont-Ferrand. My research interests are in the fields of Information Technologies (IT) and Image Processing.
Currently, I am working on a Strombolian eruption recorded during the multi-parametric campaign performed in October 2012 on the Stromboli, Italy. Around 30 videos of eruptions have been recorded at several localizations (Rochette, Heliport and Pizzo). Rapidly, the first algorithms have been discarded because they did not provide accurate results, due to the noisy background. Then, the images have been preprocessed in order to enhance the contrast and reduce the effect of the background noise. In order to verify our results, an experiment has been carried out. It consisted in a simulation of particle eruptions with ball bearings as ejecta. They have been boiled in water and thrown in front of the thermal camera. Thus, parameters like weight, size or distribution is totally controlled and they can be compared to the algorithm’s results.
The next step will be to analyze the first computed parameters (velocities, volumes, distribution), then test the algorithm on volcanic eruption data and finally detail my work in a publication.
Research interests: Image processing and modeling, Algorithms development; Geophysical data acquisitions, Geophysical characterization of volcanic eruption.
My PhD thesis aims to extract, from eruptions recorded by thermal cameras, several parameters such as particle size distribution, particle velocities, mass fluxes, plume directions and spreading angles. The high frame rate (200Hz) of the camera provides an important quantity of data which allows me to try a large panel of image processing methods.
- Barnie T., Bombrun M., Burton M.R., Harris A., Sawyer G., (2015). Quantification of gas and solid emissions during Strombolian explosions using simultaneous sulphur dioxide and infrared camera observations. Journal of Volcanology and Geothermal Research doi:10.1016/j.jvolgeores.2014.10.003.
- Bombrun M., Harris A., Gurioli L., Battaglia J., Barra V., (2015). Anatomy of a Strombolian eruption: inferences from particle data recorded with thermal video. Journal of Geophysical Research – Solid Earth vol.120, p.2367-2387, 4, doi:10.1002/2014JB011556.