Frequency-domain scene-based non-uniformity correction and application to microgrid polarimeters

Wiley T. Black, Charles F. LaCasse IV, J. Scott Tyo

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

4 Citations (Scopus)


Non-uniformity noise is common in infrared imagers, and is usually corrected through calibration, often by momentarily blocking the optical system with a relatively uniform temperature plate. The non-uniformity patterns also tend to drift and require periodic recalibration, necessitating occasional loss of video from the imager during the recalibration process. Microgrid polarimeters are especially sensitive to fixed-pattern noise because the polarization signal is acquired by differentiation of neighboring pixels. Scene-based algorithms attempt to alleviate the need for recalibration of the imager through image processing techniques. We introduce a new frequency-domain scene-based non-uniformity estimation and correction technique, and apply the technique to infrared and microgrid polarimeter imagery. The technique demonstrates promising results for shutter-assisted (recalibration) video, for microgrid polarization systems as well as most spatially modulated sensor systems.

Original languageEnglish
Title of host publicationPolarization Science and Remote Sensing V
ISBN (Print)9780819487704
Publication statusPublished - 2011
Externally publishedYes
EventPolarization Science and Remote Sensing V 2011 - San Diego, United States of America
Duration: 21 Aug 201122 Aug 2011

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferencePolarization Science and Remote Sensing V 2011
Country/TerritoryUnited States of America
CitySan Diego
Internet address


  • Fixed-Pattern Noise
  • Long-wave infrared
  • Microgrid
  • Polarimetry
  • Scene-Based Non-Uniformity Correction

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