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Proceedings Paper

Target acquisition modeling based on human visual system performance
Author(s): J. Mathieu Valeton; Aart van Meeteren
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Paper Abstract

Target acquisition performance of human observers is quantified in experiments with real target imagery. It is possible to describe the results with two basic laws of human visual perception. It is shown that recognition of military targets is equivalent to the detection of a circular disc of a certain size and contrast. The size of this disc is characteristic of the difficulty of the observation task. Once the critical disc parameters for a given task are known, the target recognition distance or probability can be calculated. This approach has been termed the 'equivalent disc approach' and has resulted in a target acquisition model for the visible spectrum called PHIND (Photons In Noise Detectability). It will be shown that this approach can in principle be extended to the thermal infrared spectrum. The 'disc detection' concept incorporates the effects of resolution, low contrast, low luminance, and noise.

Paper Details

Date Published: 1 July 1991
PDF: 17 pages
Proc. SPIE 1486, Characterization, Propagation, and Simulation of Sources and Backgrounds, (1 July 1991); doi: 10.1117/12.45752
Show Author Affiliations
J. Mathieu Valeton, TNO Institute for Perception (Netherlands)
Aart van Meeteren, TNO Institute for Perception (Netherlands)


Published in SPIE Proceedings Vol. 1486:
Characterization, Propagation, and Simulation of Sources and Backgrounds
Wendell R. Watkins; Dieter Clement, Editor(s)

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