About me

My name is Sébastien Lefèvre, and I am currently a Full Professor in Computer Science at the University of South Brittany (Vannes Institute of Technology) since September 2010.
I founded the OBELIX group from IRISA laboratory, and led the group from 2013 to 2021 (Prof. Nicolas Courty is leading the group since March 2021).
I am also coordinating the GeoData Science track within the Erasmus Mundus Copernicus Master in Digital Earth.
My main research topics are image analysis/processing, pattern recognition and indexing, machine learning, deep learning and data mining with applications in remote sensing for Earth observation.


I am continuously 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

Short Vitae

  • since 2017. Promoted 1st class at the national level (CNU 27)
  • since 2010. Full Professor at the University of South Brittany
  • 2013-2021. Founder and Head of the OBELIX research team (IRISA, UBS/CNRS)
  • 2012-2016. Deputy Head of the Doctoral School SICMA
  • 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, PhD in 2018, supervised with Bertrand Le Saux (ONERA)
  • Çağlayan Tuna, PhD in 2020, supervised with François Merciol and Charlotte Pelletier
  • Florent Guiotte, PhD in 2021, supervised with Thomas Corpetti
  • Ahmed Samy Nassar, PhD in 2021, supervised with Jan Dirk Wegner (ETH Zurich)
  • Heng Zhang, PhD in 2021, supervised with Elisa Fromont and Bruno Avignon (Atermes)

  • Javiera Castillo Navarro, (started in January 2019), supervised with Bertrand Le Saux and Alexandre Boulch (ONERA)
  • Manal Hamzaoui, (started in November 2019), supervised with Laetitia Chapel and Minh-Tan Pham
  • Iris De Gelis, (started in January 2020), supervised with Thomas Corpetti
  • Jean-Christophe Burnel (started in September 2020), supervised with Luc Courtrai

Academic responsibilities

I am (or was recently) implied in the following academic responsabilities:


International projects

  • Copernicus Master in Digital Earth (Erasmus Mundus Joint Master Degree with University of Salzbourg and Palacky University Olomouc)
  • Monitoring of tree species with object-based satellite image time series analysis (PHC Pamoja with TU Kenya)

National projects

  • coordinator of ASTERIX (ANR JCJC with LETG-Costel, DYNAFOR, LIVE and IPGS) (completed)
  • member of VEGIDAR (CNES TOSCA with LETG-Costel, LabSTICC, IGN and LIVE) (completed)
  • member of SESAME (ANR ASTRID with Lab-STICC, IRISA-Myriads, and CLS) (completed)
  • member of DeepDetect (ANR ASTRID with Lab-STICC, IUEM, and MBDA) (completed)
  • member of Game of Trawls (FEAMP with IFREMER, Marport, CDMPMEM56) (started 2019)
  • member of MULTISCALE (ANR PRCI with LETG-Costel, Gebze Technical University and Istanbul Technical University) (started 2019)
  • member of 6P (ANR PRCE with GE, EPOC, ISPA, BRGM, AJ) (started 2019)
  • coordinator of SEMMACAPE (ADEME with FEM, AFB, WIPSEA) (started 2019)
  • scientific coordinator of OWFSOMM (ANR/FEM) (started 2020)

Regional/local projects

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

Industrial collaborations

  • SIRS
  • Tellus Environment
  • CLS
  • Magellium
  • Quantcube
  • CNES
  • DGA


The complete list can be found on HAL or my google scholar webpage. A local repository (probably not up-to-date) 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