Julien Flamant



2018: Ph.D. Centrale Lille 🇫🇷

2015: M.Phil U. Melbourne 🇦🇺

2014: MSc. ENS Cachan 🇫🇷

CNRS, CRAN, Université de Lorraine, Nancy, France.

Welcome !

I am a CNRS research scientist at CRAN since 2019. I am a member of the SiMul research group., the multidimensional signal processing research group in the BioSiS department at CRAN.

I develop signal processing theory and methods to leverage polarization properties in physics, focusing on interpretable, geometric and algebraic approaches.
My research interests include bivariate signal processing, polarimetric imaging, quaternion-valued signal processing, with applications to underwater acoustics and gravitational waves in astrophysics.

Wanna join our group? We have currently a 12-month postdoctoral researcher position available on Geometric Bayesian inference for bivariate signals, starting anytime in 2023. See also this master internship position.


Sep 8, 2023 Our overview paper Quaternions in Signal and Image Processing: A comprehensive and objective overview has been published in IEEE Signal Processing Magazine.
Jun 15, 2023 4 papers accepted at the French signal processing conference GRETSI. See you in Grenoble in august!
May 31, 2023 New paper “Broadband properties of potential and kinetic energies in an oceanic waveguide” with Julien Bonnel published in JASA.
Apr 12, 2023 New version of our preprint Polarimetric Fourier phase retrieval along with the study of its related uniqueness properties in the new preprint Uniqueness of rank-one auto-correlation matrix polynomials factorization.
Mar 17, 2023 Two papers accepted at ICASSP’23. See you in the greek island of Rhodes in June!

selected publications

    Quaternions in Signal and Image Processing: A comprehensive and objective overview
    IEEE Signal Processing Magazine, 2023
  2. submitted
    Polarimetric Fourier phase retrieval
    Julien FlamantKonstantin UsevichMarianne Clausel, and David Brie
    Mar 2023
  3. submitted
    On factorization of rank-one auto-correlation matrix polynomials
    Konstantin UsevichJulien FlamantMarianne Clausel, and David Brie
    Jul 2023
    A General Framework for Constrained Convex Quaternion Optimization
    Julien FlamantSebastian Miron, and David Brie
    IEEE Transactions on Signal Processing, Jul 2022
  5. JASA
    Polarization of ocean acoustic normal modes
    Julien BonnelJulien Flamant, David R. Dall’Osto, Nicolas Le Bihan, and Peter H. Dahl
    The Journal of the Acoustical Society of America, Jul 2021