title: Motion sharpening: evidence for the addition of high spatial frequencies to the effective neural image.
abstract: The perceived blur of drifting sinusoidal gratings was compared to that of static, blurred "square wave" gratings before and after adaptation to a missing fundamental (MF) pattern. The results indicate that the perceived blur of a drifting sine grating is inversely related to its drift speed. However, after adaptation to a MF pattern, this effect is reduced. The adaptation effect is most profound for low contrast gratings. The results provide tentative evidence for a non-linear stage in motion processing which serves to introduce higher frequencies into the neural image which are not present in the original signal.
authors.affiliation: Vision Research Unit, School of Psychology, Cardiff University, U.K. hammett@idf.ext.jussieu.fr
authors.forename: S T
authors.initials: ST
authors.lastname: Hammett
authors.forename: P J
authors.initials: PJ
authors.lastname: Bex
mesh_terms: D000221:Adaptation, Ocular; D005403:Fixation, Ocular; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D009903:Optical Illusions / Q000502:physiology; D010364:Pattern Recognition, Visual / Q000502:physiology*; D011594:Psychometrics; D013997:Time Factors