title: Detection of orientationally multimodal textures.
abstract: Oriented textures were produced with the use of probability density functions modulated sinusoidally over orientation. Orientational contrast sensitivity functions (OCSFs) for a task involving the discrimination of these patterns from orientationally-random textures were found for several human observers. An inverse Fourier transform of this OCSF yielded a weighting function, or filter, defined over orientation. The weighting function is broad, with a half-height full-width of 34 deg. This orientational filter was able to predict human performance in further discrimination tasks employing a variety of probability density functions over orientation.
authors.affiliation: Department of Pharmacology, University of Edinburgh, Scotland.
authors.forename: D R
authors.initials: DR
authors.lastname: Keeble
authors.forename: F A
authors.initials: FA
authors.lastname: Kingdom
authors.forename: B
authors.initials: B
authors.lastname: Moulden
authors.forename: M J
authors.initials: MJ
authors.lastname: Morgan
mesh_terms: D015350:Contrast Sensitivity; D004192:Discrimination, Psychological / Q000502:physiology; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008297:Male; D011601:Psychophysics; D012399:Rotation; D012684:Sensory Thresholds / Q000502:physiology