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The electrophysiological correlate of contour integration is similar for color and luminance mechanisms
Author(s) -
Mathes Birgit,
Fahle Manfred
Publication year - 2007
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.2007.00501.x
Subject(s) - luminance , methods of contour integration , stimulus (psychology) , psychology , electrophysiology , computer vision , artificial intelligence , communication , neuroscience , cognitive psychology , computer science , mathematics , mathematical analysis
Contour integration perceptually links together similarly oriented line elements hidden between randomly oriented distracters. To investigate how contour integration depends on early sensory processing, we compared the electrophysiological correlate of contour integration of elements defined by luminance (black‐and‐white) or isoluminant color (red‐and‐green) contrasts. Detection performance for color‐ and luminance‐defined contours (both open and closed) was matched. Detectable contours elicited a negative shift over posterior electrodes starting 220 ms after stimulus onset. The shift occurred for both color and luminance contrasts, even when possible luminance artifacts in red‐and‐green stimuli were masked. This indicates a common physiological processing stream for orientation‐based contour integration of red‐and‐green and black‐and‐white elements.