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Proceedings Paper

Optimum viewing distance for target acquisition
Author(s): Gerald C. Holst
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Paper Abstract

Human visual system (HVS) “resolution” (a.k.a. visual acuity) varies with illumination level, target characteristics, and target contrast. For signage, computer displays, cell phones, and TVs a viewing distance and display size are selected. Then the number of display pixels is chosen such that each pixel subtends 1 min-1. Resolution of low contrast targets is quite different. It is best described by Barten’s contrast sensitivity function. Target acquisition models predict maximum range when the display pixel subtends 3.3 min-1. The optimum viewing distance is nearly independent of magnification. Noise increases the optimum viewing distance.

Paper Details

Date Published: 12 May 2015
PDF: 7 pages
Proc. SPIE 9452, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXVI, 94520K (12 May 2015); doi: 10.1117/12.2181408
Show Author Affiliations
Gerald C. Holst, JCD Publishing Co. (United States)

Published in SPIE Proceedings Vol. 9452:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXVI
Gerald C. Holst; Keith A. Krapels, Editor(s)

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