Hi! I am a researcher at IGN, the French National Geographical Institute, in the computer science department MATIS. The focus of my research is to exploit the graph structure of spatial/temporal data to improve the precision and speed of learning methods.

During my PhD I studied learning and optimization structured by large graphs (total variation, graphical models, etc). I now work on remote sensing application such as  semantic semantization of LiDAR point clouds, satellite hyperspectral imagery and surface reconstruction. I have also developed an interest for deep models structured by graphs such as recurrent networks (GRU, LSTM, ECC).


– February 2019: Kigali, Rwanda, Teaching assistant at African Master of Machine Intelligence, Graphical Models with Guillaume Obozinski
– March 2019, Barcelona, Spain, EduServ, Deep Learning for Remote Sensing
March 2019, Champs-sur-Marne, Deep Metric Learning on 3D Point Clouds
– 2 Avril 2019, Univ. Paris-Est, Structured Deep Learning for 3D Point Cloud Semantic Segmentation
– April 2019, Champs-sur-Marne, Co-organiser of the 28th Conference on IGN Research
– May 2019: Univ. Montpellier, Graph-Sructured Signals: Learning and Optimization
– June 2019: ISPRS Geospatial week,  University of Twente, Netherlands, Tutorial on Deep Learning for Point Cloud Semantic Segmentation
– June 2019: EduServ remote course on Deep Learning for Remote Sensing,
– June 2019: EduServ point Cloud Oversegmentation with Graph-Structured Deep Metric Laarning

RECENT TALKS: (contact me if you want the presentations)

– December 2018: University of Erlangen, Germany, Deep Metric Learning on Point Clouds
–  August 2018: Optimization in Image Analysis Summer School, Copenhagen
– July 2018: ICML2018, Stockholm: Cut-pursuit algorithm for Regularizing Non smooth Functionals with Graph Total Variation
– June 2018 : RFIAP2018, ENSG: Large-scale Point Cloud Semantic Segmentation with Superpoint Graphs
– June 2018: CVPR2018, Salt Lake City : Large-scale Point Cloud Semantic Segmentation with Superpoint Graphs (Poster)
June 2018 : SIAM symposium in Bologne, Graph Techniques for Image Processing
– June 2018 : NoMADS, Politecnico di Milano, Nonlocal Methods for Imaging
May 2018 : FOSS-4G, ENSG: presentation of the SuperPointGraph repository

NEW: the new version of cut pursuit can now handle nonsmooth terms, and is considerably optimized (speed x1000 compared to state-of-the art for EEG inverse problems). The preprint is ready, the code as well!

NEW: our new framework superpoint graph, with Martin Simonovsky, is first in the Semantic3D challenge by 11.8 and 8.8 mIoU points. We also lead the S3DIS challenge by 12.4 mIoU  points. Check out the code here.

I currently co-advise 4 PhD students:
Stéphane Guinard
Mohamed Boussaha
Vivien Sainte Fare Garnot
Raphael Sulzer

I teach machine learning at master DesiGéo and master PPMD at ENSG as a teaching assistant, and in the machine learning course et ENCP.

I review for ICML, NIPS, ICCV, Mathematical Reviews, IJDSA, ANR, ISPRS among many others.