Shape from polarization in the far IR applied to 3D digitization of transparent objects
Résumé
This paper presents an
application of “shape from polarization” method in the far Infrared range with applications for
three-dimensional reconstruction of
transparent objects. Shape from polarization is a recent application of more general polarization imaging technique having the aim to digitize the shape of the observed object. The principle
is to evaluate the normal on each observed point
followed by an integration procedure. The technique is well developed in the visible domain, but not in the far infrared domain due to the requirement of telecentric optics. We propose here a
complete setup in the 8-13
micrometer spectral band with an appropriate source and a reconstruction method including
the pinhole camera model in order to use standard optics
for the camera. We present
primary results of three-dimensional digitization of transparent objects.