Working Paper Article Version 1 This version is not peer-reviewed

Polarimetric Imaging VS Conventional Imaging: Evaluation of Image Contrast in Fog

Version 1 : Received: 30 April 2021 / Approved: 5 May 2021 / Online: 5 May 2021 (13:07:36 CEST)

How to cite: Ballesta-Garcia, M.; Peña-Gutiérrez, S.; Val-Martí, A.; Royo, S. Polarimetric Imaging VS Conventional Imaging: Evaluation of Image Contrast in Fog. Preprints 2021, 2021050058 Ballesta-Garcia, M.; Peña-Gutiérrez, S.; Val-Martí, A.; Royo, S. Polarimetric Imaging VS Conventional Imaging: Evaluation of Image Contrast in Fog. Preprints 2021, 2021050058

Abstract

An evaluation of image contrast in a controlled foggy environment has been made by comparison between intensity imaging and different modes of polarimetric imaging. A small-scale fog chamber has been designed and constructed to create the necessary controlled foggy environment. A linear polarimetric camera of division of focal plane and a linearly polarized light source has been used for performing the experiments with polarized light. In order to evaluate the image contrast of the different imaging modes, the Michelson’s contrast of samples of different materials relative to their background has been calculated. The higher the image contrast, the easier is to detect and segment the targets of interest that are surrounded by fog. It has been proved quantitatively that in the studied situations polarimetric images present an improvement in contrast when compared to conventional intensity images.

Subject Areas

turbid media; fog; polarimetry; memory effect; polarimetric imaging; image processing; contrast; detection.

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