NDLI: Nonuniformity correction of infrared cameras by reading radiance temperatures with a spatially nonhomogeneous radiation source

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Nonuniformity correction of infrared cameras by reading radiance temperatures with a spatially nonhomogeneous radiation source

Content Provider	Scilit
Author	Gutschwager, Berndt Hollandt, Jörg
Copyright Year	2016
Description	Journal: Measurement Science and Technology We present a novel method of nonuniformity correction (NUC) of infrared cameras and focal plane arrays (FPA) in a wide optical spectral range by reading radiance temperatures and by applying a radiation source with an unknown and spatially nonhomogeneous radiance temperature distribution. The benefit of this novel method is that it works with the display and the calculation of radiance temperatures, it can be applied to radiation sources of arbitrary spatial radiance temperature distribution, and it only requires sufficient temporal stability of this distribution during the measurement process. In contrast to this method, an initially presented method described the calculation of NUC correction with the reading of monitored radiance values. Both methods are based on the recording of several (at least three) images of a radiation source and a purposeful row- and line-shift of these sequent images in relation to the first primary image. The mathematical procedure is explained in detail. Its numerical verification with a source of a predefined nonhomogeneous radiance temperature distribution and a thermal imager of a predefined nonuniform FPA responsivity is presented.
Related Links	http://iopscience.iop.org/article/10.1088/1361-6501/28/1/015401/pdf
ISSN	09570233
e-ISSN	13616501
DOI	10.1088/1361-6501/28/1/015401
Journal	Measurement Science and Technology
Issue Number	1
Volume Number	28
Language	English
Publisher	IOP Publishing
Publisher Date	2016-11-28
Access Restriction	Open
Subject Keyword	Journal: Measurement Science and Technology Radiance Temperatures Nonhomogeneous Radiance Temperature Distribution
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Instrumentation Engineering

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