Polarization-based vision through haze

• DOI: 10.1364/ao.42.000511
• Publication Date: 2007-08-16T19:21:32Z
• Authors: Yoav Y. Schechner; Srinivasa G. Nara...; Shree K. Nayar
• Keywords: Haze; Polarizer; Diffuse sky radiation; Atmospheric optics; Polarizing filter; Starlight

We present an approach for easily removing the effects of haze from passively acquired images. Our is based on fact that usually natural illuminating light scattered by atmospheric particles (airlight) partially polarized. Optical filtering alone cannot remove effects, except in restricted situations. method, however, stems physics-based analysis works under a wide range and viewing conditions, even if polarization low. The does not rely specific scattering models such as Rayleigh knowledge illumination directions. It can be used with few two images taken through polarizer at different orientations. As byproduct, method yields map scene, which enables scene rendering imaged viewpoints. also information about particles. experimental results complete dehazing outdoor scenes, far-from-ideal conditions filtering. obtain great improvement contrast correction color.