Full-wave and half-wave rectification in second-order motion perception

Vision Research
J A Solomon, G Sperling

Abstract

Microbalanced stimuli are dynamic displays which do not stimulate motion mechanisms that apply standard (Fourier-energy or autocorrelational) motion analysis directly to the visual signal. In order to extract motion information from microbalanced stimuli, Chubb and Sperling [(1988) Journal of the Optical Society of America, 5, 1986-2006] proposed that the human visual system performs a rectifying transformation on the visual signal prior to standard motion analysis. The current research employs two novel types of microbalanced stimuli: half-wave stimuli preserve motion information following half-wave rectification (with a threshold) but lose motion information following full-wave rectification; full-wave stimuli preserve motion information following full-wave rectification but lose motion information following half-wave rectification. Additionally, Fourier stimuli, ordinary square-wave gratings, were used to stimulate standard motion mechanisms. Psychometric functions (direction discrimination vs stimulus contrast) were obtained for each type of stimulus when presented alone, and when masked by each of the other stimuli (presented as moving masks and also as nonmoving, counterphase-flickering masks). given sufficient contrast, ...Continue Reading

References

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Citations

May 16, 2012·Proceedings of the National Academy of Sciences of the United States of America·Yu-Jen Lee, Karin Nordström
Jan 22, 2000·Proceedings. Biological Sciences·A JohnstonP W McOwan
Sep 25, 1999·Perception & Psychophysics·Z L Lu, G Sperling
Aug 31, 2010·Vision Research·Mohd Izzuddin Hairol, Sarah J Waugh
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May 27, 1999·Vision Research·G Mather, L Murdoch
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Feb 19, 2021·Scientific Reports·Satoshi ShioiriChia-Huei Tseng

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