Colour-luminance interactions in binocular summation.
Using a noise-masking paradigm we test the notion of binocular detection mechanisms that combine luminance and colour contrast. Binocular summation was measured for achromatic and red-green isoluminant Gabor stimuli over a range of temporal frequencies and was compared with and without the presence of a two-dimensional, dynamic, luminance noise mask (correlated). While we found that luminance noise reduced binocular luminance summation at all temporal frequencies, binocular red-green summation was reduced only at frequencies of 8 Hz and above. Our results suggest the existence of binocular colour-luminance interactions restricted to high temporal frequencies.
Medina
José M
JM
McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Quebec, Canada H3A 1A1. jose.medinaruiz@mcgill.ca
Mullen
Kathy T
KT
D000221:Adaptation, Ocular / Q000502:physiology; D003118:Color Perception / Q000502:physiology*; D015350:Contrast Sensitivity / Q000502:physiology*; D006801:Humans; D008029:Lighting; D010470:Perceptual Masking; D010775:Photic Stimulation; D011601:Psychophysics; D015348:Vision, Binocular / Q000502:physiology*