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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 3 — Jan. 20, 2003
  • pp: 511–525

Polarization-Based Vision Through Haze

Yoav Y. Schechner, Srinivasa G. Narasimhan, and Shree K. Nayar  »View Author Affiliations


Applied Optics, Vol. 42, Issue 3, pp. 511-525 (2003)
http://dx.doi.org/10.1364/AO.42.000511


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Abstract

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

© 2003 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(100.3020) Image processing : Image reconstruction-restoration
(150.5670) Machine vision : Range finding
(260.5430) Physical optics : Polarization
(290.1310) Scattering : Atmospheric scattering
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics

Citation
Yoav Y. Schechner, Srinivasa G. Narasimhan, and Shree K. Nayar, "Polarization-Based Vision Through Haze," Appl. Opt. 42, 511-525 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-3-511


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