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A parametric study of face recognition when image degradations are combined

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image of Spatial Vision
For more content, see Multisensory Research and Seeing and Perceiving.

This article expands and quantifies one of the classic reports of modem visual perception research-Harmon and Julesz' (1973) demonstration of an enhancement in recognition performance when area averaging (blocking) and spatial frequency filtering are sequentially applied. Our goals were twofold: first, to determine if the existence of the phenomena could be confirmed and replicated in a parametric study; second, to determine if the new results supported the critical band masking theory originally proposed by Harmon and Julesz. We confirmed the presence of the phenomenon for stimuli subtending approximately six deg of visual angle vertically, but observed a surprisingly different pattern of results for smaller stimuli subtending approximately one deg. These and other recent findings from other laboratories raise questions about their masking theory as a complete explanation of the phenomena.

Affiliations: 1: Perception Laboratory, Department of Industrial and Management Systems Engineering, Arizona State University, Tempe, AZ 85287-5906, USA


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