Shifts in the perceived location of a blurred edge increase with contrast

Bex, P J and Edgar, Graham K (1995) Shifts in the perceived location of a blurred edge increase with contrast. Perception and Psychophysics, 58 (1). pp. 31-33. ISSN 0031-5117

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Abstract

Perceived brightness is nonlinearly related to luminance. Consequently, any mechanism operating on the (transformed) luminance profile of a blurred edge to detect its location should make errors, and the magnitude of these errors should increase with contrast. The perceived location of a blurred edge was measured at a range of contrasts and a range of blur space constants in a vernier alignment task. It was found that the perceived location of a blurred edge was affected by the contrast and the blur space constant of the edge. At low contrasts, the apparent location of the blurred edge was near the calculated location of the edge, assuming the linear transduction of luminance. At higher contrasts, the perceived location of a blurred edge was shifted toward the dark side of the edge, and the shift increased with contrast.

Item Type: Article
Article Type: Article
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Schools and Research Institutes > School of Natural & Social Sciences > Psychological Sciences
Research Priority Areas: Sport, Exercise, Health & Wellbeing
Depositing User: Graham Edgar
Date Deposited: 01 Dec 2015 10:30
Last Modified: 26 Aug 2016 13:03
URI: http://eprints.glos.ac.uk/id/eprint/587

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