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8 June 2012 Real-time sub-pixel registration of imagery for an IR polarimeter
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Abstract
In imaging polarimetry, special consideration must be given to ensure proper spatial registration between frames. Edge artifacts caused by the differencing of unregistered frames has the potential to create significant spurious polarization signatures. To achieve 1/10th pixel registration or better, a software based registration approach is often required. The focus of this paper is to present an efficient algorithm for real time sub-pixel registration in a division-of-time IR polarimeter based on a rotating polarizer. This algorithm has been implemented in a commercially available rotating polarizer LWIR imaging polarimeter offered by Polaris Sensor Technologies. This paper presents measurements of image nutation in a rotating polarizer LWIR imaging polarimeter and real-time registration of image data from that same polarimeter. The registration algorithm is based on an optimal 2D convolution. Examples of registered images are provided as well as estimates of residual misregistration artifacts.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jonathan B. Hanks, J. Larry Pezzaniti, David B. Chenault, and João M. Romano "Real-time sub-pixel registration of imagery for an IR polarimeter", Proc. SPIE 8364, Polarization: Measurement, Analysis, and Remote Sensing X, 83640C (8 June 2012); https://doi.org/10.1117/12.921039
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