CV

Basics

Name Louis Berthier
Label PhD Candidate in Applied Mathematics and Machine Learning
Email louis.berthier@polytechnique.edu
Phone +33 6 47 53 53 57
Url https://LouisTier.github.io/

Work

  • 2025.08 - NOW
    Computer Vision Scientist
    Augmodo
    Uncertainty-aware computer vision for open-world retail deployments, processing millions of images daily.
    • Working alongside Sacha Hu (Senior CV Engineer), Ashley Napier (CV Group Lead), and Shubham Wagh (Senior CV Engineer).
    • Building uncertainty-aware classifiers for product identification with test-time augmentation, reducing manual QC workload by selectively accepting high-confidence predictions.
    • Developing an RGB+depth pipeline to flag empty shelf areas, focusing human review on genuinely uncertain cases.
    • Designing low-cost dataset relabeling strategies to update legacy bounding box annotations at scale using improved detectors.
  • 2024.03 - NOW
    Research Engineer (PhD Contract)
    Michelin
    Adaptive soft sensing and conformal prediction for real-time quality monitoring in rubber manufacturing.
    • Supervised by Dr. Sylvain Desroziers, Dr. Maxime Moreaud, and Guillaume Ramelet.
    • Developed TorchSOM, an open-source PyTorch library for Self-Organizing Maps (77-99% faster than MiniSom, scikit-learn API).
    • Designed five adaptive soft sensing strategies for real-time quality monitoring, validated on 35,125 production batches with up to 61% MSE reduction.
    • Developed JiT-CP and AnyhowCP, two conformal prediction frameworks for locally adaptive and anytime uncertainty quantification in industrial settings.
  • 2023.04 - 2023.09
    Research Assistant (ML & Optimization)
    Adaptive & Intelligent Robotics Lab (AIRL)
    Sample-efficient Quality-Diversity optimization using surrogate models for robotic control in uncertain environments.
    • Supervised by Pr. Antoine Cully.
    • Tackled the data-hunger of MAP-Elites by integrating probabilistic surrogate models, achieving significant gains in sample efficiency on a robotic arm control task.
    • Benchmarked eight algorithmic variants combining different surrogate architectures and acquisition strategies in non-deterministic environments.
  • 2022.05 - 2022.08
    Research Intern (ML & Neuroscience)
    Centre National de la Recherche Scientifique (CNRS)
    Deep learning for detecting fast ripples, pathological biomarkers for epileptic tissue, in intracranial EEG signals.
    • Supervised by Dr. Ludovic Gardy, Pr. Christophe Hurter, and Pr. Emmanuel Barbeau.
    • Built a CNN pipeline converting raw EEG signals into time-frequency scalograms via continuous wavelet transform for automated fast ripple classification.
    • Applied Grad-CAM to provide clinicians with visual explanations of which signal features drive each prediction.
    • Accelerated the processing pipeline by 15% through Cython optimization; improved classification accuracy by 5% via hyperparameter tuning.
  • 2022.01 - 2022.04
    Research Assistant (ML & CV)
    EuroMoov Digital Health in Motion (DHM)
    Anisotropic image filtering for sub-pixel accurate line feature detection, published at IEEE ICASSP 2023.
    • Supervised by Pr. Baptiste Magnier and Pr. Binbin Xu.
    • Designed the 2D Semi Bi-Gaussian (2DSBG) filter, an asymmetric convolution kernel that enhances elongated structures while suppressing isotropic noise.
    • Benchmarked against state-of-the-art edge detection models (DexiNed, RCF, Laplacian-of-Gaussian) on synthetic and real-world datasets.

Education

Skills

Programming & Scripting
Python, Cython
SQL, NoSQL
LaTeX, Markdown
Bash, Shell
ML/DL Frameworks
PyTorch, JAX, TensorFlow
Scikit-learn
OpenCV, PIL
Scientific Computing & Data
NumPy, Pandas, Polars
SciPy, Matplotlib, Seaborn
Streamlit
MLOps & DevOps
Git, GitHub/GitLab CI/CD
Docker, Singularity
Kubernetes
Azure ML, SkyPilot
Monitoring & Development Tools
Weights & Biases
Pytest, Unittest
Grafana
High-Performance Computing
Triton
SLURM
Faiss

References

Sacha Hu
name at augmodo dot com
Senior CV Engineer at Augmodo.
Co-supervised my work on uncertainty-aware computer vision for open-world retail deployments.
Pr. Eric Moulines
name dot surname at polytechnique dot edu
Professor at École Polytechnique and MBZUAI.
Member of the French Academy of Sciences.
Co-supervised my PhD thesis on conformal and adaptive soft sensors for real-time quality prediction in multistage industrial processes.
Dr. Ahmed Shokry
name dot surname at polytechnique dot edu
Senior Research Engineer at École Polytechnique.
Co-supervised my PhD thesis on conformal and adaptive soft sensors for real-time quality prediction in multistage industrial processes.
Dr. Sylvain Desroziers
name dot surname at michelin dot com
Manager of the Michelin I4.0 Explore team, and Fellow AI at Michelin.
Co-supervised my PhD thesis on conformal and adaptive soft sensors for real-time quality prediction in multistage industrial processes.
Dr. Maxime Moreaud
name dot surname at michelin dot com
Principal Data Scientist at Michelin.
Co-supervised my PhD thesis on conformal and adaptive soft sensors for real-time quality prediction in multistage industrial processes.
Pr. Antoine Cully
a dot surname at imperial dot ac dot uk
Professor at Imperial College London, and Director of the Adaptive & Intelligent Robotics Lab (AIRL).
Supervised my independent research project and my MSc research internship on quality-diversity optimization.
Dr. Ludovic Gardy
name dot g at sotisai dot com
Senior Data Scientist (Freelance), previously Research Engineer at CNRS.
Co-supervised my MSc research internship on ML-based pathological oscillations detection in epilepsy.

Awards

Volunteer

  • 2021.04 - 2022.04

    Alès, France

    Vice President
    EmaVisual (Photography & Video Association)
    • Led a team of 10 photographers to cover 25 university events.
    • Edited and produced multiple videos and over 10,000 photos.
  • 2021.02 - 2022.04

    Alès, France

    Vice President
    Bureau des Sports (Sports Association)
    • Led a 25-person team to manage 5 tournaments and oversee 20 sports
    • Secured partnerships with major brands, including Armor Lux and Tony Parker.
    • Managed the association’s website and IT infrastructure.
  • 2020.10 - 2021.10

    Alès, France

    Tsikyst Volunteer
    Tsiky Zanaka (Humanitarian Association)
    • Raised over €3500 to fund and support solidarity projects in Madagascar.
    • Organized and participated in fundraising events, including cooking for 300 students.
  • 2020.10 - 2023.11

    FR & UK

    Handball Player
    University
    • Achieved 3rd place in the highest national university league (BUCS, UK).
    • Achieved 4th place in the highest national university league (FFSU, France).
    • Winner of the 49th Challenge Centrale Lyon
    • Winner of the 19th TRAMS
  • 2020.09 - 2020.10

    Alès, France

    Logistics Volunteer
    Trophée Orlandini (Rugby Tournament Association)
    • Prepared event logistics and setup for a multi-school rugby tournament.
  • 2020.09 - 2021.09

    Alès, France

    Disc Jockey
    EmaMix (DJs Association)
    • Provided music and technical support for student events and gatherings.
  • 2019 - 2020

    Toulouse, France

    Contestant
    Modelling Contest | Socute Models
    • Twice finalist in a male modelling contest.

Languages

French
Native
English
Fluent
Spanish
Professional

Interests

Machine Learning Research
Uncertainty Quantification
Diffusion Models
Explainability
Unsupervised Learning
Multimodal AI
Entrepreneurship & Finance
Investments
Product Development
Podcasts
Creator Economy
Sports
NBA
MMA
Weight Training
Swimming
E-sport
Rugby
Handball