Grégoire Lefebvre (Ph.D.)

Senior Researcher in Machine Learning at Orange Labs (ex France Telecom R&D), Grenoble, France (gregoire dot lefebvre at orange dot com)Orange Expert Data & AIOrange Inventor LuminisMember 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 2008, I have been working as a Researcher in Machine Learning at Orange Labs, Grenoble.

Research topics

Deep Learning, Pervasive Interaction, Ubiquitous ComputingFace, Gesture and Activity RecognitionSmart 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

S08 _ Learning Semantic Communications for Effective 6G. To be defended in 2026. Supervised by L.A.Dufrene, Q.Lampin, G.Lefebvre, opened position.S07 _ Yoann Dupas, Edge AI for Multimodal Image Fusion. To be defended in 2025. Supervised by  O.Hotel, G.Lefebvre, C.Sérin, D.Trystram, link.S06 _ Juan Vazquez-Rodriguez, Multimodal Transformers for Affective Computing. To be defended in 2024. Supervised by G.Lefebvre, J.Cumin, J.L.Crowley, link.S05 _ Naji Najari, Smart Device Monitoring and Behavior Analyzis. To be defended in 2023. Supervised by S.Berlemont, G.Lefebvre, S.Duffner, C.Garcia, link.S04 _ Paul Compagnon, Routine prediction for eHealth services. Defended in 2021. Supervised by G.Lefebvre, S.Duffner, C.Garcia, link.S03 _ Julien Cumin, Recognizing 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 _ PSINES: Activity and Availability Prediction for Adaptive Ambient Intelligence. 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

IC35 _ Accommodating Missing Modalities in Time-Continuous Multimodal Emotion Recognition. J.Vazquez-Rodriguez, G.Lefebvre, J.Cumin, J.L.Crowley. International Conference on Affective Computing & Intelligent Interaction, ACII 2023.IC34 _ Emotion Recognition with PreTrained Transformers Using Multimodal Signals. J.Vazquez-Rodriguez, G.Lefebvre, J.Cumin, J.L.Crowley. International Conference on Affective Computing & Intelligent Interaction, ACII 2022.IC33 _ Transformer-Based Self-Supervised Learning for ECG Emotion Recognition. J.Vazquez-Rodriguez, G.Lefebvre, J.Cumin, J.L.Crowley. International Conference on Pattern Recognition, ICPR 2022.IC32 _ Robust Variational Autoencoders for Unsupervised Network Anomaly Detection. N.Najari, S.Berlemont, G.Lefebvre, S.Duffner, C.Garcia. International Conference on Advanced Information Networking and Applications, AINA 2022.IC31 _ RADON: Robust Autoencoder for Unsupervised Anomaly Detection. N.Najari, S.Berlemont, G.Lefebvre, S.Duffner, C.Garcia. International Conference on Security of Information Networks, SIN 2021.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 mentionIC21 _ 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

IW03 _ RESIST: Robust Transformer for Unsupervised Time Series Anomaly Detection. N.Najari, S.Berlemont, G.Lefebvre, S.Duffner, C.Garcia. International Conference on Workshop on AALTD@ECML 2022.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.


P31 _ Method for recognizig situations with temporary missing values. G.Lefebvre, J.Cumin, J.Vazquez, Orange 2023.P30 _ Stress Management with IoT sensors. G.Lefebvre, J.Cumin, J.Vazquez, Orange 2022.P29 _ Contextual Anomaly Detection. N.Najari, S.Berlemont, G.Lefebvre, Orange 2022.P28 _ Method for monitoring the human sleep. G.Lefebvre, Orange 2022.P27 _ Estimation of autonomy by analysis of home trips. G.Lefebvre, Orange 2021.P26 _ Method for managing notifications based on emotions deduced from electrocardiogram data. J.Cumin, G.Lefebvre, J.Vazquez, Orange 2021.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, 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, ICPR'22, IEEE TNNLS'22, IJCNN'23, IEEE TNNLS'23, ACII'23, BSPC'23, Sensors'23, IEEE TCE'23