
Proceedings Paper
Application of spatial frequency response as a criterion for evaluating thermal imaging camera performanceFormat | Member Price | Non-Member Price |
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Paper Abstract
Police, firefighters, and emergency medical personnel are examples of first responders that are utilizing thermal imaging
cameras in a very practical way every day. However, few performance metrics have been developed to assist first
responders in evaluating the performance of thermal imaging technology. This paper describes one possible metric for
evaluating spatial resolution using an application of Spatial Frequency Response (SFR) calculations for thermal imaging.
According to ISO 12233, the SFR is defined as the integrated area below the Modulation Transfer Function (MTF) curve
derived from the discrete Fourier transform of a camera image representing a knife-edge target. This concept is modified
slightly for use as a quantitative analysis of the camera's performance by integrating the area between the MTF curve
and the camera's characteristic nonuniformity, or noise floor, determined at room temperature. The resulting value,
which is termed the Effective SFR, can then be compared with a spatial resolution value obtained from human
perception testing of task specific situations to determine the acceptability of the performance of thermal imaging
cameras. The testing procedures described herein are being developed as part of a suite of tests for possible inclusion
into a performance standard on thermal imaging cameras for first responders.
Paper Details
Date Published: 15 April 2008
PDF: 8 pages
Proc. SPIE 6941, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XIX, 69411C (15 April 2008); doi: 10.1117/12.779158
Published in SPIE Proceedings Vol. 6941:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XIX
Gerald C. Holst, Editor(s)
PDF: 8 pages
Proc. SPIE 6941, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XIX, 69411C (15 April 2008); doi: 10.1117/12.779158
Show Author Affiliations
Andrew Lock, National Institute of Standards and Technology (United States)
Francine Amon, National Institute of Standards and Technology (United States)
Published in SPIE Proceedings Vol. 6941:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XIX
Gerald C. Holst, Editor(s)
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