Enhancement of the point-spread function for imaging in scattering media by use of polarization-difference imaging
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Authors
Tyo, J. Scott
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2000-01
Date
2000-01
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Abstract
Polarization-difference (PD) imaging techniques have been demonstrated to improve the detectability of target
features that are embedded in scattering media. The improved detectability occurs for both passive imaging
in moderately scattering media (,5 optical depths) and active imaging in more highly scattering media.
These improvements are relative to what is possible with equivalent polarization-blind, polarization-sum (PS)
imaging under the same conditions. In this investigation, the point-spread functions (PSFà à ¢ s) for passive PS
and PD imaging in single-scattering media are studied analytically, and Monte Carlo simulations are used to
study the PSFà à ¢ s in single- and moderately multiple-scattering media. The results indicate that the PD PSF
can be significantly narrower than the corresponding PS PSF, implying that better images of target features
with high-spatial-frequency information can be obtained by using differential polarimetry in scattering media.
Although the analysis was performed for passive imaging at moderate optical depths, the results lend insight
into experiments that have been performed in more highly scattering media with active imaging methods to
help mitigate the effects of multiple scattering.
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J. Opt. Soc. Am. A, Volume 17, No. 1, pp. 1-10, (January 2000)
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Department of Electrical and Computer Engineering
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.