9 September 2011 Frequency-domain scene-based non-uniformity correction and application to microgrid polarimeters
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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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wiley T. Black, Wiley T. Black, Charles F. LaCasse, Charles F. LaCasse, J. Scott Tyo, J. Scott Tyo, } "Frequency-domain scene-based non-uniformity correction and application to microgrid polarimeters", Proc. SPIE 8160, Polarization Science and Remote Sensing V, 816003 (9 September 2011); doi: 10.1117/12.893249; https://doi.org/10.1117/12.893249


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