Selectivity for coherence in polar orientation in human form vision.
- PubMed - NCBI
The NCBI web site requires JavaScript to function.
FormatSummarySummary (text)AbstractAbstract (text)MEDLINEXMLPMID ListChoose DestinationFileClipboardCollectionsE-mailOrderMy BibliographyCitation managerFormatSummary (text)Abstract (text)MEDLINEXMLPMID ListCSVCreate File1 selected item: FormatSummarySummary (text)AbstractAbstract (text)MEDLINEXMLPMID ListMeSH and Other DataE-mailSubjectAdditional textE-mailAdd to ClipboardAdd to CollectionsOrder articlesAdd to My BibliographyGenerate a file for use with external citation management software.Create File
):3078-87.Selectivity for coherence in polar orientation in human form vision.1, .1School of Psychology, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia. edwind@cyllene.uwa.edu.auAbstractEvidence from summation near threshold psychophysical experiments using compound Glass patterns is presented which supports the existence of mechanisms in the human visual system tuned for coherence in radial and concentric, and +45 degrees and -45 degrees spiral orientations. It is suggested that sensitivity to +45 degrees and -45 degrees logarithmic spirals serves to disambiguate the sense of spiral form, which would not be uniquely specified by measures of the components of orientation along the radial and concentric directions alone. A spiral space is introduced within which radial and concentric patterns are diametrically opposed on one axis and spirals of +45 degrees and -45 degrees on an orthogonal axis and it is proposed that these represent cardinal axes for detecting global structure. Comparison of the sensitivity tuning functions of the four mechanisms tuned to these axes with sensitivity to simple spiral Glass patterns shows that weighted combinations of output from adjacent pairs of this set of mechanisms are sufficient to account for absolute sensitivity to logarithmic spiral Glass patterns of all intermediate spiral angles. Control experiments demonstrate that the combinations are labeled for spiral sense (simple spirals of -22.5 degrees spiral angle can be discriminated from +22.5 degrees spirals at threshold for detection) and that adaptation transfers across quadrants of spiral space (adaptation to spirals of -22.5 degrees results in a decrease in sensitivity to orthogonal +22.5 degrees and -67.5 degrees spirals). Together these observations suggest that sensitivity to spirals in each of the quadrants of spiral space is due to higher order mechanisms reliant on output from 0 degrees , 90 degrees , +45 degrees and -45 degrees cardinal mechanisms.PMID:
[PubMed - indexed for MEDLINE]
Free full textPublication TypesMeSH TermsFull Text SourcesOther Literature Sources
Supplemental Content
External link. Please review our .ScheitelDesignSoftware - Shanghai Polar Vision Co., Ltd
Shanghai Polar Vision Co.,Ltd
The Shanghai Polar Vision Co.,Ltd is concentrates the photoelectricity technology, the digital-analog electric circuit technology technology company. We have the specialty the development and the production troop, as well as the advanced management idea,
产品与服务
M853120Multi- display monitors videoM991699synchronization broadcast systemM990199Medicine imagery processing systemM852190Information Dissemination System
( M=制造商, E=出口商, I=进口商, S=服务商 )
Shanghai Polar Vision Co.,LtdCaoYang road No.1222 8Shanghai,&上海市中国&200333Tel : 86-021-Homepage :
Powered by EC Plaza
Created by the "Home Page Generator" A free service of
Visitors:&&003019Polarvision
Advertising, CCTV Products
Polarvision
City: shanghai
Province/State:shanghai
Country/Region:China
Tel:86-21-
Highlighted Products
We Will Provide Quality
Advertising, CCTV Products, Monitoring & Diagnostic Equipment.
Polarvision
Shanghai Polar Vision is a solutions provider which focus on the photoelectricity and visual effect. We are providing the software for advertisment, exhibition, and sports fields. Withing our abundant experience in the fields, and our effcient design and development team, by cooperation with the hardware producer, we can provide the high quality ...
Company Profile
Company Name:
Polarvision
Business Type:
Manufacturer
Employ Number:
less than 50
Annual Sales Volume:
less than $1,000,000
Year Established:
CaoYang road No.1222/8, PuTuo district, Shanghai, China. Shanghai Shanghai 200063 China
Email to this supplier
Enter your Email please.
Your email is incorrect!
Polarvision
Subject is empty!
Characters Remaining: (80/3000)
Please enter 20 to 3000 characters to contact this supplier!
Copyright & . All rights reserved.