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Proceedings Paper

Nonuniformity correction of infrared focal plane arrays
Author(s): Wilhelm Isoz; Thomas Svensson; Ingmar Renhorn
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Paper Abstract

The non-linearity of the responsivity of infrared (IR) focal plane arrays (FPA) is a major concern when IR images are evaluated. This will affect both the detection and classification ability of the IR sensor. The nonuniformity correction (NUC) method proposed here is based on polynomial fitting to pixel responsivities. It is applied to infrared data obtained from two cooled multi-band sensors in the MWIR region. The method is shown to give both suitable data restoration and a simple and efficient computer implementation. Bad pixels were identified by evaluating the coefficents obtained from the multi degree polynomial. Bad pixels were also replaced by using a nearest neighbour-hood algorithm. The NUC method, including the bad pixel identification and replacement, was implemented in a user friendly GUI (graphic user interface) for calibration of registered IR data.

Paper Details

Date Published: 31 May 2005
PDF: 12 pages
Proc. SPIE 5783, Infrared Technology and Applications XXXI, (31 May 2005); doi: 10.1117/12.606691
Show Author Affiliations
Wilhelm Isoz, Linkoping Institute of Technology (Sweden)
Thomas Svensson, Swedish Defence Research Agency, FOI (Sweden)
Ingmar Renhorn, Swedish Defence Research Agency, FOI (Sweden)

Published in SPIE Proceedings Vol. 5783:
Infrared Technology and Applications XXXI
Bjorn F. Andresen; Gabor F. Fulop, Editor(s)

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