Exploiting motion-based redundancy to enhance microgrid polarimeter imagery

Bradley M. Ratliff, J Scott Tyo, Wiley T. Black, Charles F. LaCasse

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

Microgrid polarimeters are a type of division of focal plane (DoFP) imaging polarimeter that contains a mosaic of pixel-wise micropolarizing elements superimposed upon an FPA sensor. Such a device measures a slightly different polarized state at each pixel. These measurements are combined to estimate the Stokes vector at each pixel in the image. DoFP devices have the advantage that they can obtain Stokes vector image estimates for an entire scene from a single frame capture. However, they suffer from the disadvantage that the neighboring measurements that are used to estimate the Stokes vector images are acquired at differing instantaneous fields of view (IFOV). This IFOV issue leads to false polarization signatures that significantly degrade the Stokes vector images. Interpolation and other image processing strategies can be employed to reduce IFOV artifacts; however these techniques have a limit to the amount of enhancement they can provide on a single microgrid image. Here we investigate algorithms that use multiple microgrid images that contain frame-to-frame global motion to further enhance the Stokes vector image estimates. Motion-based imagery provides additional redundancy that can be exploited to recover information that is "missing" from a single microgrid frame capture. We have found that IFOV and aliasing artifacts can be defeated entirely when these types of algorithms are applied to the data prior to Stokes vector estimation. We demonstrate results on real LWIR microgrid data using a particular resolution enhancement technique from the literature.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7461
DOIs
StatePublished - 2009
EventPolarization Science and Remote Sensing IV - San Diego, CA, United States
Duration: Aug 3 2009Aug 4 2009

Other

OtherPolarization Science and Remote Sensing IV
CountryUnited States
CitySan Diego, CA
Period8/3/098/4/09

Fingerprint

Microgrid
Polarimeter
Polarimeters
redundancy
polarimeters
imagery
Redundancy
Stokes
Motion
Field of View
Instantaneous
field of view
Pixels
Pixel
pixels
estimates
Focal Plane
Estimate
division
artifacts

Keywords

  • Focal Plane Array
  • Image Processing
  • Infrared
  • Microgrid
  • Polarimeter
  • Polarimetry
  • Registration
  • Resolution Enhancement
  • Stokes Vector

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Ratliff, B. M., Tyo, J. S., Black, W. T., & LaCasse, C. F. (2009). Exploiting motion-based redundancy to enhance microgrid polarimeter imagery. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7461). [74610K] https://doi.org/10.1117/12.823849

Exploiting motion-based redundancy to enhance microgrid polarimeter imagery. / Ratliff, Bradley M.; Tyo, J Scott; Black, Wiley T.; LaCasse, Charles F.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7461 2009. 74610K.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ratliff, BM, Tyo, JS, Black, WT & LaCasse, CF 2009, Exploiting motion-based redundancy to enhance microgrid polarimeter imagery. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7461, 74610K, Polarization Science and Remote Sensing IV, San Diego, CA, United States, 8/3/09. https://doi.org/10.1117/12.823849
Ratliff BM, Tyo JS, Black WT, LaCasse CF. Exploiting motion-based redundancy to enhance microgrid polarimeter imagery. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7461. 2009. 74610K https://doi.org/10.1117/12.823849
Ratliff, Bradley M. ; Tyo, J Scott ; Black, Wiley T. ; LaCasse, Charles F. / Exploiting motion-based redundancy to enhance microgrid polarimeter imagery. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7461 2009.
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