Mid-infrared speckle reduction technique for hyperspectral imaging - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Mid-infrared speckle reduction technique for hyperspectral imaging

Résumé

Recently, we proposed an active mid-infrared (MIR) hyperspectral imaging system for early detection of plant water stress. A quantum cascade tunable laser powered this stand-off detection system, in which "speckle" in images due to coherent nature of laser radiation. The speckle affects the spatial resolution of the images. In this article, we evaluate several speckle suppression methods suitable for the mid-infrared region. To quantify the reduction of speckle, we compare their spatial contrast. We combined optical techniques and showed their ability to reduce the speckle contrast from its initial value 0.41s down to 0.11, representing a 73% reduction.
Fichier non déposé

Dates et versions

hal-04090141 , version 1 (05-05-2023)

Identifiants

Citer

Maroun Hjeij, Luiz Poffo, Bastien Billiot, Ronan Le Page, Pascal Besnard, et al.. Mid-infrared speckle reduction technique for hyperspectral imaging. SPIE Photonics Europe 2022, Apr 2022, Strasbourg, France. pp.121380F, ⟨10.1117/12.2621817⟩. ⟨hal-04090141⟩
20 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More