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TOD Predicts Target Acquisition Performance for Staring and Scanning Thermal Imagers


Author: Bijl, P. · Valeton, J.M. · Jong, A.N. de
Publisher: SPIE
Place: Bellingham, WA.
Institution: TNO Human Factors Research Institute TNO Fysisch en Elektronisch Laboratorium
Source:Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XI, 26-27 April 2000, Orlando, USA, 96-103
Proceedings of SPIE
Identifier: 95291
doi: doi:10.1117/12.391771
Keywords: Vision · Image sensors · Infrared imaging · Object recognition · Scanning · Standards · Minimum resolvable temperature difference method · MRTD · Performance metrics · Triangle orientation discrimination method · TOD · Imaging systems · Electro-optical systems · Performance testing · Target acquisition · Therman imagers · Validation


Identification and recognition performance for four staring and two scanning thermal imagers, were measured in an observer experiment using images that were collected during a NATO field trial in Nettuno, Italy, in 1998. The dataset allows validation of the MRTD and alternative sensor performance measures such as the TOD (Triangle Orientation Discrimination threshold). The 75% correct Target Acquisition ranges were compared with the TOD sensor acuity and the MRTD spatial frequency at (Delta) T equals 2 K. The results show that the ratio between the 75% correct TA range and TOD sensor acuity (which is the equivalent to the cycle criterion in MRTD-based models), is independent of the sensor type used, which means that the TOD is a good predictor of sensor performance.