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Proceedings Paper

Recognition criterion for two-dimensional minimum resolvable temperature difference
Author(s): Howard V. Kennedy
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Paper Abstract

Performance models based on two-dimensional MRTD have been used in the industry for several years. The new C2NVEO thermal imaging model, FLIR90, has been available for almost a year now, and also uses a 2-D MRTD to predict range performance. A two- dimensional MRTD, if used with the same cycle count criteria as the older static performance model, will predict different detection and recognition ranges for any given target. Based on their psychophysical studies, C2NVEO recommends that recognition criteria for the new model be 3/4 of that used with the old model. A brief derivation of the two-dimensional MRT as a measure of resolution capability is presented. The modified criteria is then justified using the rationale of the derivation. A generic common module FLIR is analyzed using both the old and new models, showing how different ranges will be predicted if the same cycle criteria for recognition and detection is used. It is then demonstrated that similar ranges are predicted if the cycle criteria for the two models are set at the ratio of 4:3. A comparison of criteria for several sensors for which actual field measurements exist is also presented.

Paper Details

Date Published: 1 September 1991
PDF: 7 pages
Proc. SPIE 1488, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing II, (1 September 1991); doi: 10.1117/12.45802
Show Author Affiliations
Howard V. Kennedy, Texas Instruments Inc. (United States)

Published in SPIE Proceedings Vol. 1488:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing II
Gerald C. Holst, Editor(s)

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