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Published on: August 30, 2013
Geometric representation of the mechanisms underlying human curvature detection
1Department of Optometry, University of Bradford, West Yorkshire, UK. d.j.whitaker@bradford.ac.uk
Abstract:
Combined manipulation of blur, line length and contrast reveal two distinct processes involved in curvature detection. When line length is small relative to blur, thresholds are almost directly proportional to blur and independent of line length. When line length is large relative to blur thresholds are directly proportional to line length and independent of blur. The aspect ratio (line length/blur) of curved contours represents a scale-invariant metric which forms the decisive factor in determining curvature performance.
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