Adaptive algorithms for two-channel polarization sensing under various polarization statistics with nonuniform distributions

Konstantin M. Yemelyanov, Shih Schön Lin, Edward N Pugh Jr, Nader Engheta

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The polarization of light carries much useful information about the environment. Biological studies have shown that some animal species use polarization information for navigation and other purposes. It has been previously shown that a bioinspired polarization-difference imaging (PDI) technique can facilitate detection and feature extraction of targets in scattering media. It has also been established [J. Opt. Soc. Am. A 15, 359 (1998)] that polarization sum and polarization difference are the optimum pair of linear combinations of images taken through two orthogonally oriented linear polarizers of a scene having a uniform distribution of polarization directions. However, in many real environments the scene has a nonuniform distribution of polarization directions. Using principal component analysis of the polarization statistics of the scene, we develop a method to determine the two optimum information channels with unequal weighting coefficients that can be formed as linear combinations of the images of a scene taken through a pair of linear polarizers not constrained to the horizontal and vertical directions of the scene. We determine the optimal orientations of linear polarization niters that enhance separation of a target from the background, where the target is defined as an area with distinct polarization characteristics as compared to the background. Experimental results confirm that in most situations adaptive PDI outperforms conventional PDI with fixed channels.

Original languageEnglish (US)
Pages (from-to)5504-5520
Number of pages17
JournalApplied Optics
Volume45
Issue number22
DOIs
StatePublished - Aug 1 2006
Externally publishedYes

Fingerprint

Adaptive algorithms
Statistics
statistics
Polarization
polarization
polarizers
Imaging techniques
polarization characteristics
principal components analysis
linear polarization
navigation
imaging techniques
pattern recognition
animals
Principal component analysis
Feature extraction
Animals
Navigation
Scattering
coefficients

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Adaptive algorithms for two-channel polarization sensing under various polarization statistics with nonuniform distributions. / Yemelyanov, Konstantin M.; Lin, Shih Schön; Pugh Jr, Edward N; Engheta, Nader.

In: Applied Optics, Vol. 45, No. 22, 01.08.2006, p. 5504-5520.

Research output: Contribution to journalArticle

Yemelyanov, Konstantin M. ; Lin, Shih Schön ; Pugh Jr, Edward N ; Engheta, Nader. / Adaptive algorithms for two-channel polarization sensing under various polarization statistics with nonuniform distributions. In: Applied Optics. 2006 ; Vol. 45, No. 22. pp. 5504-5520.
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