Segmentation of rough surfaces using a polarization imaging system.
A polarimetric vision system yielding a roughness-segmentation-based image is described. As a general principle, the bidirectional reflectance distribution function (BRDF) of a surface is assumed to be related to its local irregularities, i.e., its roughness. This BRDF is seen as the sum of a specular and a diffuse component. In this paper we propose to introduce polarization measurements in order to estimate this roughness parameter without requiring any assumption for the model of the diffuse component, nor is diffuse-specular separation required. Moreover, with the proposed method, the refractive indices of the observed objects are estimated at each pixel. Examples are given for quality control applications.
Terrier
Patrick
P
Laboratoire d'Automatique Génie Informatique et Signal, UMR CNRS 8146, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq cedex, France. patrick.terrier@univ-lille1.fr
Devlaminck
Vincent
V
Charbois
Jean Michel
JM