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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 14 — Jul. 4, 2011
  • pp: 12937–12960

Super-resolution for imagery from integrated microgrid polarimeters

Russell C. Hardie, Daniel A. LeMaster, and Bradley M. Ratliff  »View Author Affiliations

Optics Express, Vol. 19, Issue 14, pp. 12937-12960 (2011)

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Imagery from microgrid polarimeters is obtained by using a mosaic of pixel-wise micropolarizers on a focal plane array (FPA). Each distinct polarization image is obtained by subsampling the full FPA image. Thus, the effective pixel pitch for each polarization channel is increased and the sampling frequency is decreased. As a result, aliasing artifacts from such undersampling can corrupt the true polarization content of the scene. Here we present the first multi-channel multi-frame super-resolution (SR) algorithms designed specifically for the problem of image restoration in microgrid polarization imagers. These SR algorithms can be used to address aliasing and other degradations, without sacrificing field of view or compromising optical resolution with an anti-aliasing filter. The new SR methods are designed to exploit correlation between the polarimetric channels. One of the new SR algorithms uses a form of regularized least squares and has an iterative solution. The other is based on the faster adaptive Wiener filter SR method. We demonstrate that the new multi-channel SR algorithms are capable of providing significant enhancement of polarimetric imagery and that they outperform their independent channel counterparts.

© 2011 OSA

OCIS Codes
(100.6640) Image processing : Superresolution
(120.2130) Instrumentation, measurement, and metrology : Ellipsometry and polarimetry
(120.5410) Instrumentation, measurement, and metrology : Polarimetry
(110.5405) Imaging systems : Polarimetric imaging

ToC Category:
Imaging Systems

Original Manuscript: May 6, 2011
Revised Manuscript: June 1, 2011
Manuscript Accepted: June 2, 2011
Published: June 20, 2011

Russell C. Hardie, Daniel A. LeMaster, and Bradley M. Ratliff, "Super-resolution for imagery from integrated microgrid polarimeters," Opt. Express 19, 12937-12960 (2011)

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