Discrimination of spatial phase: The roles of luminance distribution and attention.
We can easily discriminate certain phase relations in spatial patterns but not others. Phase perception has been found different in the fovea vs. periphery, and for single patterns vs. textures. Different numbers of mechanisms have been proposed to account for the regularities of phase perception. I...
| Publicado en: | Vision Research Vol. 150; pp. 1 - 8 |
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| Autor principal: | |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Pergamon Press - An Imprint of Elsevier Science
Sep2018
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=131767073&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 131767073 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00426989 2FL jtl: Vision Research issn: 00426989 maglogo: N pubinfo: dt: Sep2018 vid: 150 pid: 2410 pub: Pergamon Press - An Imprint of Elsevier Science artinfo: ui: 131767073 131767073 NLM30003892 131767073 10.1016/j.visres.2018.06.012 NLM30003892 131767073 ppf: 1 ppct: 7 formats: tig: atl: Discrimination of spatial phase: The roles of luminance distribution and attention. aug: au: Põder, Endel Põder, Endel affil: Institute of Psychology, University of Tartu, Tartu, Näituse 2, 50409 Tartu, Estonia sug: subj: Visual Acuity Physiology Attention Light Visual Perception Physiology Male Young Adult Cues Female Adult Human Visual Fields Validation Studies Comparative Studies Evaluation Research Multicenter Studies Adult: 19-44 years Male Female ab: We can easily discriminate certain phase relations in spatial patterns but not others. Phase perception has been found different in the fovea vs. periphery, and for single patterns vs. textures. Different numbers of mechanisms have been proposed to account for the regularities of phase perception. In this study, I attempt to better understand the mechanisms behind discrimination of spatial phase. In order to reveal the role of luminance cues, I use histogram matching of patterns with different phases. Possible effects of attention were studied using visual search experiments with varied stimulus set size. Simple and compound Gabor patches, broadband lines and edges, and textures composed of those patterns were used as stimuli. The experiments indicate that phase discrimination is mediated by two mechanisms. The first uses luminance differences and operates pre-attentively, in parallel across the visual field. The second compares relative positions of dark and bright segments within an image, and is strictly limited by capacity of attention. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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