Lines and Gabor functions compared as spatial visual stimuli

Vision Research
G Westheimer

Abstract

Foveal discrimination thresholds were measured for orientation, vernier alignment, bisection, displacement detection and stereoscopic acuity using simple line stimuli and also sinusoidal grating patches with gaussian intensity modulation (Gabor stimuli). Stimulus parameters such as luminance, exposure duration, component separation and, as far as possible, length were identical for both. Orientation discrimination as a function of length is almost identical for the two classes of stimuli, some observers performing slightly better with Gabor patches. Thresholds for displacement detection are also the same. Vernier, stereo and bisection acuities, however, are considerable better with line than with Gabor stimuli.

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Citations

Sep 28, 2002·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Hovagim BakardjianTsunehiro Takeda
May 13, 2004·Visual Neuroscience·Chris Tailby, Andrew Metha
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Jun 16, 2009·The Journal of Physiology·Gerald Westheimer
Oct 23, 2012·Vision Research·Viljami R Salmela, Jussi Saarinen
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Mar 23, 2005·Vision Research·Nestor Matthews, Jason Allen
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May 12, 2020·Investigative Ophthalmology & Visual Science·Tiong Peng YapMei Ying Boon
Apr 12, 2000·Journal of Neurophysiology·S L Brincat, G Westheimer

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