Measurement and modeling of peripheral detection and discrimination thresholds.

Autor: Fleck, H.
Zdroj: Biological Cybernetics; 1989, Vol. 61 Issue 6, p437-446, 10p
Abstrakt: This report describes experimental measurements of threshold contrasts as a function of the angle to the visual axis (peripheral threshold contrasts). The visual tasks consist in detection (perception of presence) and discrimination (perception of a form feature) of simple visual signs during a fixation period realistic observing conditions being chosen. Proceeding from the experimental findings a model for forecasting off-axis threshold contrast functions on different visual conditions is developed based upon spatial frequency filters. Further with the aid of a known model visibility fields are calculated. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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