Grégoire Lefebvre (Ph.D.)

Senior Researcher in Machine Learning at Orange Labs (ex France Telecom R&D), Grenoble, France

Orange Expert Data & AI

Member of the MIAI Institute (Chair Collaborative Intelligent System)

Short bio

I received an Engineering degree in Applied Mathematics from the National Institute of Applied Sciences (INSA), Rouen, in 2000,
and a Ph.D. degree in Cognitive Sciences from the University of Bordeaux, funded by France Telecom R&D, Rennes, in 2007.

Since 2007, I have been working as a Researcher in Machine Learning at Orange Labs, Grenoble.

Research topics

Deep Learning, Pervasive Interaction, Ubiquitous Computing
Face, Gesture and Activity Recognition
Smart Home, eHealth


D05 _ Mahdi Abid, Magnetometric Localisation for eHealth Services, 2019.
D04 _ Thomas Hassan, Human Localisation in Smart Homes, 2018.(with F.Ramparany)
D03 _ Aida Makni, Human Posture Detection and Device Attitude Estimation, 2017.(with M. Berenguer)
D02 _ Alaeddine Mihoub, Social Intelligence Modeling, 2016.
D01 _ Steven Strachan, Vibrotactile Feedback Modeling, 2009.(with S.Zijp-Rouzier)

PhD students

S06 _ Juan Vazquez, Providing Smart Services based on Emotion Recognition. To be defended in 2024. Supervised by G.Lefebvre, J.Cumin, J.L.Crowleylink.
S05 _ Naji Najari, Smart Device Monitoring and Behavior Analyzis. To be defended in 2023. Supervised by S.Berlemont, G.Lefebvre, S.Duffner, C.Garcialink.
S04 _ Paul Compagnon, Routine prediction for eHealth services. To be defended in 2021. Supervised by G.Lefebvre, S.Duffner, C.Garcia, link.
S03 _ Julien CuminRecognizing and predicting activities in smart homes. Defended in 2018. Supervised by G.Lefebvre, F.Ramparany, J.L.Crowley, link.
S02 _ Samuel Berlemont, Automatic non linear metric learning. Defended in 2016. Supervised by G.Lefebvre, S.Duffner, C.Garcia, link.
S01 _ Rick Moritz, Routine activity extraction from local alignments in mobile phone context data. Defended in 2014. Supervised by G.Lefebvre, A.Pauchet, M.Mainguenaud, link.

Book chapter

C01 _ Inertial Gesture Recognition with Bidirectional Long Short-Term Memory Recurrent Neural Networks. G.Lefebvre, S.Berlemont, F.Mamalet, C.Garcia, Springer Series in Bio-Neuro-informatics Artificial Neural Networks - Methods and Applications, 2014.

International journals

J08 _ Improving Indoor Geomagnetic Field Fingerprinting using Recurrence Plot based CNN. M.Abid, G.Lefebvre, Journal of Location Based Services, 2020.
J07 _ Activity Prediction in Smart Homes Using Dynamic Bayesian Networks. J.Cumin, G.Lefebvre, F.Ramparany, J.Crowley, ACM Transaction on Autonomous and Adaptive Systems, 2020.
J06 _ Learning Personalized ADL Recognition Models from Few Raw Data. P.Compagnon, G.Lefebvre, S.Duffner, C.Garcia, Elsevier Artifical Intelligence in Medecine, 2020.
J05 _ Wearables and Social Signal Processing for Smarter Public Presentations. A.Mihoub, G.Lefebvre, ACM Transaction on Interactive Intelligent Systems, 2019.
J04 _ HAR Using Place-based Decision Fusion in a Smart Home Context Management System. J.Cumin, F.Ramparany, G.Lefebvre, J.L.Crowley, Modeling and Using Context, 2018.
J03 _ Class-Balanced Siamese Neural Networks. S.Berlemont, G.Lefebvre, S.Duffner, C.Garcia, Neurocomputing, Elsevier, 2017.
J02 _ Evolution of Activities of Daily Living using Inertia Measurements: The Lunch and Dinner Activities. M.Berenguer, M-J.Bouzid, A.Makni, G.Lefebvre, N.Noury, Journal of the International Society for Telemedicine and eHealth, 2017.
J01 _ Fast-Learning Adaptive-Subspace Self-Organizing Map : An Application to Saliency-Based Invariant Image Feature Construction. H.Zheng, G.Lefebvre, C.Laurent, IEEE Transaction on Neural Networks, 2008.

International conferences

IC30 _ Improved CNN-based Magnetic Indoor Positioning System using Attention Mechanism. M.Abid, P. Compagnon, G.Lefebvre, International Conference on Indoor Positioning and Indoor Navigation, IPIN 2021.
IC29 _ Deep Neural Networks for Indoor Geomagnetic Field Fingerprinting with Regression Approach. M.Abid, G.Lefebvre, International Conference on Engineering Applications of Neural Networks, EANN 2021.
IC28 _ Sequence Metric Learning as Synchronization of Recurrent Neural Networks. P.Compagnon, G.Lefebvre, S.Duffner, C.Garcia, International Joint conference on Neural Networks, IJCNN 2021.
IC27 _ Network Traffic Modeling For IoT Device Re-Identification. N.Najari, S.Berlemont, G.Lefebvre, S.Duffner, C.Garcia, International Conference on Omni-layer Intelligent Systems, IEEE COINS 2020.
IC26 _ Routine Modeling with Time Series Metric Learning. P.Compagnon, G.Lefebvre, S.Duffner, C.Garcia, 27th International Conference Artificial Neural Networks, ICANN 2019.
IC25 _ Personalized Posture and Fall Classification with Shallow Gated Recurrent Units. P.Compagnon, G.Lefebvre, S.Duffner, C.Garcia, IEEE Computer-Based Medical System, 2019.
IC24 _ A semantic event approach to enrich device-free indoor localization data. T.Hassan, F.Ramparany, G.Lefebvre, EAI International Conference on Smart Objects and Technologies for Social Good, 2018.
IC23 _ Attitude Estimation for Posture Detection in eHealth Services. A.Makni, G.Lefebvre, IEEE Computer-Based Medical System, 2018.
IC22 _ Social Intelligence Modeling using Wearable Devices. A.Mihoub, G.Lefebvre, ACM IUI 2017. best paper - honourable mention
IC21 _ A Dataset of Routine Daily Activities in an Instrumented Home. J. Cumin, G.Lefebvre, F.Ramparany, J.L.Crowley, Ubiquitous Computing & Ambiant Intelligent, UCAmI, 2017. 
IC20 _ Human Activity Recognition Using Placed-Based Decision Fusion in smart Homes. J.Cumin, G.Lefebvre, F.Ramparany, J.L.Crowley, CONTEXT 2017.
IC19 _ Polar Sine-based Siamese Neural Network for Gesture Recognition. S.Berlemont, G.Lefebvre, S.Duffner, C.Garcia, ICANN 2016.
IC18 _ A priori Data and A posteriori Decision Fusions for Human Action Recognition. J.Cumin, G. Lefebvre, VISAPP 2016.
IC17 _ Recognizing Human Actions based on Extreme Learning Machines. G.Lefebvre, J.Cumin, VISAPP 2016.
IC16 _ Siamese Neural Network based Similarity Metric for Inertial Gesture Classification and Rejection. S.Berlemont, G.Lefebvre, S.Duffner, C.Garcia, IEEE FG 2015.
IC15 _ 3D Gesture Classification with Convolutional Neural Networks. S.Duffner, S.Berlemont, G.Lefebvre, C.Garcia, IEEE ICASSP 2014.
IC14 _ BLSTM-RNN based 3D Gesture Classification. G.Lefebvre, S.Berlemont, F.Mamalet, C.Garcia, Springer ICANN 2013.
IC13 _ Learning a Bag of Features based Nonlinear Metric for Facial Similarity. G.Lefebvre, C.Garcia, IEEE AVSS 2013.
IC12 _ Coupling Gestures with Tactile Feedback: A Comparative User Study. G.Lefebvre, E.Boyer, S.Zijp-Rouzier, ACM NordiCHI 2012.
IC11 _ Multi-Touch based Video Selection with an Audio Emotional Curve. G.Lefebvre, ACM CHI 2012.
IC10 _ Gesture based Interaction for visually Impaired People. S.Vidal, G.Lefebvre, ACM NordiCHI 2010.
IC09 _ OverView : Physically-Based Vibrotactile Feedback for Temporal Information Browsing. S.Strachan, G.Lefebvre, S.Zijp-Rouzier, ACM MobileHCI 2009.
IC08 _ A Probabilistic Self-Organizing Map For Facial Recognition. G.Lefebvre, C.Garcia, IEEE ICPR 2008.
IC07 _ A Heterogeneous Descriptor Fusion Process For Visual Concept Identification. G.Lefebvre, C.Garcia, IEEE Fusion 2008.
IC06 _ Facial Biometry by Stimulating Salient Singularity Masks. G.Lefebvre, C.Garcia, IEEE AVSS 2007.
IC05 _ Efficient Codebooks for Visual Concept Recognition by ASSOM Activation. G.Lefebvre, C.Garcia, NNAM 2006.
IC04 _ Objectionable Image Detection by ASSOM Competition. G.Lefebvre, H.Zheng, C.Laurent, ACM CIVR 2006.
IC03 _ A Cascade of Unsupervised and Supervised Neural Networks for Natural Images Classification. J.Ros, C. Laurent, G.Lefebvre, ACM CIVR 2006.
IC02 _ On the Basis Updating Rule of Adaptive-Subspace Self-Organizing Map (ASSOM). H.Zheng, C.Laurent, G.Lefebvre, Springer ICANN 2006.
IC01 _ Supervised Image Classification by SOM Activity Map Comparison.  G.Lefebvre, C.Laurent, J.Ros, C.Garcia, IEEE ICPR 2006.

International workshops

IW02 _ Inferring Availability for Communication in Smart Homes Using Context. J.Cumin, G.Lefebvre, F.Ramparany, J.L.Crowley, IEEE PerCom Workshop on Context and Activity Modeling and Recognition, 2018.  
IW01 _ A Multimodal Contact List to Enhance Remote Communication. A.Crossan, G.Lefebvre, S.Zijp-Rouzier, R.Murray-Smith, Mobile Social Signal Processing, LNCS Volume 8045, 2010.

French conferences

FC04 _ Apprentissage de métrique non linéaire par réseaux de neurones siamois : Application à la perception gestuelle. S.Berlemont, G.Lefebvre, S. Duffner, C. Garcia, RFIA 2016.
FC03 _ Fusion de caractéristiques inertielles pour la reconnaissance de gestes. S.Berlemont, G.Lefebvre, GRETSI 2013.
FC02 _ Sélection de singularités locales par stimulation d'une carte GHSOM. G.Lefebvre, C.Garcia, J.M. Salotti, J.Ros, GRETSI 2007.
FC01 _ Énergies ASSOM pour la détection d’objets. G.Lefebvre, C.Garcia, J.M. Salotti, CORESA 2006.


P25 _ Transport Mode Recognition. G.Lefebvre, P.Compagnon, Orange 2020.
P24 _ Anomaly detection. S.Berlemont, N.Najari, G.Lefebvre, Orange 2020.
P23 _ Predicting emotional situations. G.Lefebvre, Orange 2020.
P22 _ Human Activity Routine Estimation. P.Compagnon, G.Lefebvre, Orange 2019.
P21 _ Automatic Home Usage Evaluation. G.Lefebvre, Orange 2019.
P20 _ Behavior Change Detection. G.Lefebvre, P.Compagnon, Orange 2018.
P19 _ Group Situation Detection with Semantic Analysis. T.Hassan, F.Ramparany, G.Lefebvre, Orange 2018.
P18 _ Eligibility Metric. D.Cibaud, G.Lefebvre, Orange 2018.
P17 _ Occupant Availability Prediction. G.Lefebvre J.Cumin, F. Ramparany, Orange 2017.
P16 _ Human Behavior Modeling. A.Mihoub, G.Lefebvre, Orange 2017.
P15 _ A method of recognizing user contexts. G.Lefebvre, Orange 2016. 
P14 _ A method of recognizing handwriting on a physical surface. G.Lefebvre, Orange 2015. 
P13 _ Localized knocking gestures for digit code inputs. G.Lefebvre, Orange 2014.
P12 _ Method for unlocking touch screen electronic device with haptic feedback. C.Masson, T.Perez-Segovia, S.Zijp-Rouzier, G.Lefebvre, Orange 2014.
P11 _ Contextual Gesture Recognition. R.Moritz, G.Lefebvre, Orange 2013.
P10 _ Automatic Gesture Segmentation. G.Lefebvre, S.Roux, E.Petit, Orange 2013.
P09 _ Tactile pairing. G.Lefebvre, FTR&D 2012.
P08 _ Audio and Tactile Signal Creation on Smartphones. G.Lefebvre, S.Zijp-Rouzier, A.Crossan, T.Dingler, R.Murray-Smith, FTR&D 2012.
P07 _ Object pairing. R.Ebel, G.Lefebvre, A.Gimeno, J.-P.Laval, E.Moniz, E.Tosi Brandi, C.Ramus, J.Augi, FTR&D 2011.
P06 _ Audio Vibration Tactile Feedback Generation Process for Gesture Interaction. G.Lefebvre, E.Petit, S.Zijp-Rouzier, S.Strachan, FTR&D 2010.
P05 _ Method for user interaction with multimedia contents. G.Lefebvre, A.Gimeno, FTR&D 2009.
P04 _ Method and device for video content classification by saliant neural temporal maps. G.Lefebvre, C.Garcia, FTR&D 2008.
P03 _ Construction of a neural network for the recognition of an image carrier. G.Lefebvre, C.Garcia, FTR&D 2008.
P02 _ A method for image classification with multi-modal neuron cards. G.Lefebvre, C.Garcia, FTR&D 2007.
P01 _ Method for classifying images by neuronal networks and a classifier of pre-learned images. H.Zheng, C.Laurent, G.Lefebvre, FTR&D 2006.


T01 _ Sélection et Fusion de Signatures Visuelles Parcimonieuses, Application à la classification d'images. G.Lefebvre, december, 2007. Supervised by C.Garcia and J-M.Salotti, Jury: J.Ponce, H.Cardot, M.Daoudi, link.


CVPR’07, IHM’09, IHM’10, EURASIP’11, UAIS’11, ICANN’14, CHI’14, NordiCHI’14, CHI'15, IEEE TPAMI'15, ICHR'15, TVX'16, MobileHCI'16, UbiComp'16, RFIA'16,
HRI'17, IET CV'17, IEEE TNNLS'17, IET CV'18, IEEE TNNLS'18, IEEE Access'18, Sensors'18, Electronics'19, IEEE TNNLS'19, Sensors'19, IEEE TNNLS'20, IEEE TNNLS'21, ICANN'21