HAL : hal-00665140, version 1

PubMed : 19568304

DOI : 10.1364/JOSAA.26.001678

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Journal of the Optical Society of America A 26, 7 (2009) 1678-86

Target detection in active polarization images perturbed with additive noise and illumination nonuniformity.

Arnaud Bénière 1, 2, François Goudail 1, Daniel Dolfi 2, Mehdi Alouini 3

(07/2009)

Active imaging systems that illuminate a scene with polarized light and acquire two images in two orthogonal polarizations yield information about the intensity contrast and the orthogonal state contrast (OSC) in the scene. Both contrasts are relevant for target detection. However, in real systems, the illumination is often spatially or temporally nonuniform. This creates artificial intensity contrasts that can lead to false alarms. We derive generalized likelihood ratio test (GLRT) detectors, for which intensity information is taken into account or not and determine the relevant expressions of the contrast in these two situations. These results are used to determine in which cases considering intensity information in addition to polarimetric information is relevant or not.

1 :	Laboratoire Charles Fabry de l'Institut d'Optique (LCFIO)
	Institut d'Optique Graduate School (IOGS) – CNRS : UMR8501 – Université Paris XI - Paris Sud
2 :	Thales Research and Technology [Palaiseau] (TRT)
	THALES
3 :	Institut de Physique de Rennes (IPR)
	Université de Rennes 1 – CNRS : UMR6251

Équipe de recherche : lcf-scop Photonique et Lasers

Domaine

:

Physique/Physique/Optique Chimie/Chimie théorique et/ou physique

Mots Clés : Artifacts – Light* – Lighting* – Likelihood Functions – Optical Processes*

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Contributeur : Dorothée Destouches <>

Soumis le : Vendredi 6 Avril 2012, 11:48:02

Dernière modification le : Vendredi 6 Avril 2012, 17:34:14