Psychophysical and computational studies of random-dot Moire patterns K. PRAZDNY Machine Perception Group, Artificial Intelligence Laboratory, FMC Corporation, 1185 Coleman Avenue, Box 580, Santa Clara, CA 95052, USA Received 28 June 1985; accepted in revised form 12 November 1985 Abstract-Random-dot Moire dot patterns epitomize the local/global gap, the problem of perceiving global structures when only physical local information is available to the perceptual system. At present, no single theory appears to be able to account for all the phenomena these physically simple patterns generate. INTRODUCTION A random-dot Moire pattern (RDMP) is the perception of a global organization obtained by superimposing a usually pseudo-randomly distributed set of features (e.g. small dots) on a geometrically and possibly figurally transformed version of itself' (Glass, 1969, 1979; Glass and Perez, 1973; Glass and Switkes, 1976). The superimpo- sition of the original pattern and its copy results, if the distances between the correlated features are not too large, in an impression of global structure with orientations corresponding to correlations defined by the physical transformation (Fig. 1). Such patterns are interesting because the individual features do not have inherent directionality; local orientations corresponding to the global pattern must be obtained by some kind of
Spatial Vision (continued as Seeing & Perceiving from 2010) – Brill
Published: Jan 1, 1986
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