Searched for: subject%3A%22Contrast%255C%2Bthresholds%22
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Salem, S. (author), Jacobs, E. (author), Moore, R. (author), Hogervorst, M.A. (author), Bijl, P. (author), TNO Defensie en Veiligheid (author)
Perception tests establish the effects of spatially band-limited noise and blur on human observer performance. Previously, Bijl showed that the contrast threshold of a target image with spatially band-limited noise is a function of noise spatial frequency. He used the method of adjustment to find the contrast thresholds for each noise frequency...
conference paper 2008
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Bijl, P. (author), Hogervorst, M.A. (author), Toet, A. (author), TNO Technische Menskunde (author)
We investigate the effect of band-limited masking noise and blur on the minimum contrast required to identify a) military targets, b) the standard MRTD and MTDP four-bar test pattern and c) the TOD equilateral triangle test pattern. First, the image containing the test object was spatially blurred by an amount varying from one pixel up to the...
conference paper 2004