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via ScienceDirect Publication: Vision Research on 6/16/11
Publication year: 2011Source: Vision Research, In Press, Accepted Manuscript, Available online 16 June 2011
Jason, Bell , Elena, Gheorghiu , Robert F., Hess , Frederick A.A., Kingdom
Radial frequency (RF) patterns can be used to study the processing of familiar shapes, e.g. triangles and squares. Opinion is divided over whether the mechanisms that detect these shapes integrate local orientation and position information directly, or whether local orientations and positions are first combined to represent extended features, such as curves, and that it is local curvatures that the shape mechanism integrates. The latter view incorporates an intermediate processing stage, the former does not. To differentiate between these hypotheses we studied the processing of micro-patch sampled RF patterns as a function of the luminance polarity of successive elements on...
Highlights: ► We investigated whether global contour shape processing involves an intermediate stage ► Luminance polarity alternations disrupt shape processing, consistent with an intermediate stage ► These findings resolve a point of contention in the current shape literature
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