Dynamic Contrast Requirements.
HONEYWELL INC MINNEAPOLIS MINN SYSTEMS AND RESEARCH CENTER
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Three experiments were conducted to investigate the spatial and temporal relationship between the human visual system and displayed imagery. In Experiment I, contrast sensitivity for sinusoidal gratings was determined as a function of spatial frequency, temporal frequency, luminance, and stimulus position on the retina. In Experiment II, contrast sensitivity for sinusoidal grids was determined as a function of the horizontal and vertical spatial frequency, and temporal frequency. In Experiment III, sinusoidal grating targets on grating surrounds were used to determine contrast sensitivity as a function of target spatial frequency, surround spatial frequency, and temporal frequency. The data from the three experiments indicate how much contrast is required under specified conditions to just detect a noise-free target defined in terms of its spatial and temporal frequency content. The results provide a means for predicting the visibility of targets in real displays.
- Human Factors Engineering and Man Machine Systems