Publications by Michel Kocher | EPFL Graph Search

Compressed Sensing for Temperature Measurements With Incoherent Raman OFDR Distributed Sensors

Using compressed sensing (CS), stepped Raman optical frequency-domain reflectometry (ROFDR) can be performed on a reduced set of frequencies. We experimentally show that temperature hotspots can be reconstructed from a small subset of the usually required ...

IEEE Institute of Electrical and Electronics Engineers2024

Fast Raman OFDR via Compressed Sensing - a Numerical Experiment

Michel Kocher

Raman Optical frequency-domain reflectometry (ROFDR) can take advantage of compressed sensing to retrieve approximate temperature profiles. We numerically show that hotspots can be reconstructed from a small subset of the otherwise required frequencies und ...

Optical Society of America2023

Choreography Controlled (ChoCo) brain MRI artifact generation for labeled motion-corrupted datasets

Bastien Chopard, Michel Kocher, François Lazeyras, Sébastien Courvoisier, Julien Songeon

MRI is a non-invasive medical imaging modality that is sensitive to patient motion, which constitutes a major limitation in most clinical applications. Solutions may arise from the reduction of acquisition times or from motion-correction techniques, either ...

ELSEVIER SCI LTD2022

Fast high-resolution brain metabolite mapping on a clinical 3T MRI by accelerated H-1-FID-MRSI and low-rank constrained reconstruction

Michel Kocher, Dimitri Nestor Alice Van De Ville, François Lazeyras, Sébastien Courvoisier, Matthieu Guerquin-Kern, Jeffrey Adam Kasten

Purpose: Epitomizing the advantages of ultra short echo time and no chemical shift displacement error, high-resolution-free induction decay magnetic resonance spectroscopic imaging (FID-MRSI) sequences have proven to be highly effective in providing unbias ...

WILEY2019

Recent Advances of Malaria Parasites Detection Systems Based on Mathematical Morphology

Michel Kocher

Malaria is an epidemic health disease and a rapid, accurate diagnosis is necessary for proper intervention. Generally, pathologists visually examine blood stained slides for malaria diagnosis. Nevertheless, this kind of visual inspection is subjective, err ...

2018

Morphology-driven automatic segmentation of MR images of the neonatal brain

Michel Kocher, François Lazeyras, Laura Ioana Gui, Radoslaw Lisowski

The segmentation of MR images of the neonatal brain is an essential step in the study and evaluation of infant brain development. State-of-the-art methods for adult brain MRI segmentation are not applicable to the neonatal brain, due to large differences i ...

Elsevier Science Bv2012

Nonlocal Means With Dimensionality Reduction and SURE-Based Parameter Selection

Michel Kocher, Dimitri Nestor Alice Van De Ville

Nonlocal means (NLM) is an effective denoising method that applies adaptive averaging based on similarity between neighborhoods in the image. An attractive way to both improve and speed-up NLM is by first performing a linear projection of the neighborhood. ...

IEEE2011

determination of fibre didtribution and orientation in fibre reinforced composites

Eugen Brühwiler, Emmanuel Denarié, John Wuest, Michel Kocher

2009

Tomography Analysis Of Fiber Distribution And Orientation In Ultra High-Performance Fiber-Reinforced Composites With High-Fiber Dosages

Eugen Brühwiler, Emmanuel Denarié, John Wuest, Michel Kocher, Emmanuel Gallucci

2009

SURE-Based Non-Local Means

Michel Kocher, Dimitri Nestor Alice Van De Ville

Non-local means (NLM) provides a powerful framework for denoising. However, there are a few parameters of the algorithm-most notably, the width of the smoothing kernel-that are data-dependent and difficult to tune. Here, we propose to use Stein's unbiased ...

IEEE Institute of Electrical and Electronics Engineers2009

Myocardial perfusion assessment by use of system identification method in a one-compartment model

Philippe Thévenaz, Michel Kocher

Cardiovascular magnetic resonance has been shown to provide high data quality for myocardial perfusion assessment However, to analyze the perfusion data, some signal processing and modeling is needed to correct for motion related artifacts and limited spat ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2007

Automatic Analysis of microRNA Microarray Images Using Mathematical Morphology

Michel Kocher

The micro array are an experimental technique for parallel determination of molecular concentration. The image analysis is an important, time consuming and error prone step of the process. We describe here an automatic procedure able to analyze the micro a ...

IEEE2007

Codage d'images à haute compression basé sur un modèle contour-texture

Michel Kocher

EPFL1983