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Guidelines for accurate TOD measurement

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Author: Bijl, Piet · Valeton, J.Mathieu
Publisher: SPIE
Place: Bellingham, WA, United States
Institution: TNO Human Factors Research Institute
Source:Proceedings of the 1999 Infrared Imaging Systems: Design, Analysis, Modeling and Testing X, 7 April 1999 through 8 April 1999, Orlando, FL, USA, Conference code: 55306, 3701, 14-25
Proceedings of SPIE - The International Society for Optical Engineering
Identifier: 234868
ISBN: 0819431753
Keywords: Vision · Curve fitting · Electrooptical devices · Equipment testing · Image sensors · Least squares approximations · Performance · Standards · Statistical methods · Electrooptical system performance testing · Objective acceptance rejection criteria · Standard measurement procedure · Triangle orientation discrimination · Imaging systems


The Triangle Orientation Discrimination (TOD) threshold is an alternative method to characterize electro-optical system performance. The method is based on an improved test pattern, a better-defined observer task and a solid psychophysical measurement procedure, and allows accurate and comparable results from different measuring teams. With the TOD methodology, accurate sensor performance measuring and Go-NoGo testing can be easily performed.