About me

Hello! My name is Sébastien Lefèvre, and I am currently a Full Professor in Computer Science at the University of Bretagne Sud (Vannes Institute of Technology) since September 2010. My research activities take part in the OBELIX group from IRISA laboratory. My main research topics are image analysis/processing, pattern recognition and indexing, machine learning and data mining with applications in remote sensing.

Keywords: Mathematical morphology, image segmentation, hierarchical representations, scale-space, data mining, machine learning, deep learning, remote sensing


I am seeking highly-motivated candidates with excellent academic profile and proven research skills to engage in a PhD or Postdoc. Please contact me by email if you believe you match these requirements and are interested in our topics! See open positions.


Current positions

  • Head of the OBELIX research team (IRISA, UBS/CNRS)
  • Teaching within Vannes Institute of Technology (IUT Vannes), UBS
  • Research within IRISA, a Joint Research Institute from CNRS, INRIA, UR1, UBS, Telecom Bretagne, ENS Rennes, INSA Rennes, Supelec

Short Vitae

  • since 2017. Promoted 1st class at the national level (CNU 27)
  • since 2010. Full Professor at the University of South Brittany
  • 2012-2013. Head of the UBS Computer Science Lab (Vannes site of IRISA)
  • 2009-2010. Invited scientist within INRIA Rennes Bretagne Atlantique (TEXMEX team)
  • 2009. Habilitation à diriger des recherches (HDR) from University of Strasbourg
  • 2003-2010. Associate professor (Maître de Conférences) at the University of Strasbourg
  • 2002-2003. Assistant professor (ATER) at the University of Tours
  • 2002. Ph.D. degree at University of Tours, funded by ANRT & ATOS Origin, under the direction of Nicole Vincent.
  • 1999. DEA in System Control, University of Technology of Compiègne, equivalent to a Master Degree in Computer Science and Engineering,
  • 1999. Engineer diploma at UTC (University of Technology of Compiègne), Computer Engineering department, a French engineering school, equivalent to a Master Degree in Engineering.

PhD Students

I am (or was) implied in the advising process of the following PhD thesis:

  • Erchan Aptoula, PhD in 2008, supervised with Christian Ronse,
  • Sébastien Derivaux, PhD in 2009, supervised wit Jerzy Korczak and Cédric Wemmert,
  • Benjamin Perret, PhD in 2010, supervised with Christophe Collet, Erik Slezak, and Vincent Mazet,
  • Jonathan Weber, PhD in 2010, supervised with Pierre Gançarski.
  • Petra Bosilj, PhD in 2016, supervised with Ewa Kijak.
  • Romain Huet, PhD in 2017, supervised with Nicolas Courty.
  • Yanwei Cui, PhD in 2017, supervised with Laetitia Chapel.

  • Nicolas Audebert, (started in 2015), supervised with Bertrand Le Saux (ONERA).
  • Mathieu Laroze, (started in 2016), supervised with Romain Dambreville, Chloé Friguet, and Ewa Kijak.
  • Arthur Le Guennec, (started in 2016), supervised with Dimitri Lague (Geosciences Rennes) and Thomas Corpetti.
  • Ahmed Samy Nassar, (started in 2017), supervised with Jan Dirk Wegner (ETH Zurich).
  • Çağlayan Tuna, (started in 2017), supervised with François Merciol.
  • Florent Guiotte, (started in 2017), supervised with Thomas Corpetti.


International projects

  • Monitoring of tree species with object-based satellite image time series analysis (PHC Pamoja with TU Kenya)

National projects

  • SESAME (ANR ASTRID with Lab-STICC, IRISA-Myriads, and CLS)
  • DeepDetect (ANR ASTRID with Lab-STICC, IUEM, and MBDA)

Regional/local projects

  • SENSE (Labex CominLabs with Lab-STICC)
  • Littoralg (UBS PPI with other UBS labs)
  • DELORA (AAP PME with Tellus Environment and Artefacto)

Industrial collaborations

  • SIRS
  • Tellus Environment


The complete list can be found on HAL or my google scholar webpage. A local repository is also available for both my publications and talks.

HAL or my



Laboratoire IRISA
Campus de Tohannic
56000 Vannes, France
Phone : +33 (0)2 97 01 72 66
Sec. : +33 (0)2 97 01 72 35
Fax : +33 (0)2 97 01 72 79

In order to reach me

sebastien.lefevre _at_ irisa.fr