Contour Integration Across Spatial Frequency.
Association field models of contour integration suggest that local band-pass elements are spatially grouped to global contours within limited bands of spatial frequency (Field, Hayes, & Hess, 1993). While results for local orientation and spacing variation render support for AF models, effects of sp...
| Publicado en: | Journal of Experimental Psychology. Human Perception & Performance Vol. 35; no. 6; pp. 1629 - 1649 |
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| Autores principales: | , , |
| Formato: | Artículo |
| Publicado: |
American Psychological Association
December 2009
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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=ssf&AN=511458167&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 511458167 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 00961523 EPH jtl: Journal of Experimental Psychology. Human Perception & Performance issn: 00961523 maglogo: N pubinfo: dt: December 2009 vid: 35 iid: 6 pid: 34 pub: American Psychological Association artinfo: ui: 511458167 10.1037/a0016473 ppf: 1629 ppct: 20 formats: tig: atl: Contour Integration Across Spatial Frequency. aug: au: Persike, Malte Olzak, Lynn A. Meinhardt, Günter su: Space perception Form perception Visual learning sug: subj: Space perception Form perception Visual learning ab: Association field models of contour integration suggest that local band-pass elements are spatially grouped to global contours within limited bands of spatial frequency (Field, Hayes, & Hess, 1993). While results for local orientation and spacing variation render support for AF models, effects of spatial frequency (SF) have rarely been addressed. To explore whether contour integration occurs across SF, we studied human contour detection in Gabor random fields with SF jitter along the contour, and in the embedding field. Results show no impairment of contour detection when the contour elements are 1.25 octaves apart. Even with a SF separation of 2.25 octaves there is only moderate impairment. Because SF tuning functions measured for contextual interactions of neighbored single band-pass elements indicate much smaller bandwidths (Polat & Sagi, 1993), the results imply that contour integration cannot rest solely on local locking among neighbored orientation and SF tuned mechanisms. Robustness across spatial frequency, and across color and depth, as found recently, indicates that local orientation based grouping integrates across other basic features. This suggests an origin in not too distal brain regions. Reprinted by permission of the publisher. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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