Arnaud Latty

Biographie

Travail de master en acoustique: développement d'une méta-ligne de transmission active

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https://people.epfl.ch/arnaud.latty?lang=fr

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Personnes menant des recherches similaires

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Lippmann Photography: A Signal Processing Perspective

Gilles Baechler, Arnaud Latty, Michalina Wanda Pacholska, Adam James Scholefield, Martin Vetterli

Lippmann (or interferential) photography is the first and only analog photography method that can capture the full color spectrum of a scene in a single take. This technique, invented more than a hundred years ago, records the colors by creating interference patterns inside the photosensitive plate. Lippmann photography provides a great opportunity to demonstrate several fundamental concepts in signal processing. Conversely, a signal processing perspective enables us to shed new light on the technique. In our previous work (G. Baechler et al., 2021), we analyzed the spectra of historical Lippmann plates using our own mathematical model. In this paper, we provide the derivation of this model and validate it experimentally. We highlight new behaviors whose explanations were ignored by physicists to date. In particular, we show that the spectra generated by Lippmann plates are in fact distorted versions of the original spectra. We also show that these distortions are influenced by the thickness of the plate and the reflection coefficient of the reflective medium used in the capture of the photographs. We verify our model with extensive experiments on our own Lippmann photographs.

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

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Multi-spectral image priniting method

Gilles Baechler, Yves Bellouard, Arnaud Latty, Michalina Wanda Pacholska, Adam James Scholefield, Martin Vetterli

The present disclosure concerns a multi-spectral image printing method. The method includes the steps of: - providing a multi-spectral image; - providing a material; - determining changes in a refractive index value of the material permitting to reproduce the multi-spectral image when the material is illuminated; and - generating the changes in refractive index value in the material.

2019

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The audiovisual communications laboratory (lcav.epfl.ch) is looking for students for the development of an interferential hyperspectral camera, as part of a semester project. It involves building, testing and improving, in collaboration with the scientific and technical team, a portable prototype based on a principle already successfully tested on an optical table. The ideal candidates would be trained in mechanics, electronics, embedded systems or optics.

2018

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