دورية أكاديمية
Perceived ridigity and nonridigity in the depth effect.
| العنوان: | Perceived ridigity and nonridigity in the depth effect. |
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| المؤلفون: | GANIS G, CASCO, CLARA, RONCATO, SERGIO |
| المساهمون: | Ganis, G, Casco, Clara, Roncato, Sergio |
| بيانات النشر: | PION LTD, 207 BRONDESBURY PARK, LONDON, ENGLAND NW2 5JN |
| سنة النشر: | 1993 |
| المجموعة: | Padua Research Archive (IRIS - Università degli Studi di Padova) |
| مصطلحات موضوعية: | INTERPOLATED ELASTIC STRUCTURE, RANDOM-DOT CINEMATOGRAMS, SHORT-RANGE PROCESS, FIXED-AXIS MOTION, APPARENT MOTION, 3-DIMENSIONAL STRUCTURE, DISPLACEMENT LIMITS, PERCEPTION, ROTATION, DISCRIMINATION |
| الوصف: | Stroboscopic simulations of three-dimensional rotating rigid structures can be perceived as highly nonrigid. To investigate this nonrigidity effect a sequence of either three (experiment 2 and 3) or thirty six frames (experiment 4) was used, each consisting of a set of dots with location on the horizontal axis corresponding to the parallel projection of a nominally defined helix. Observers were asked to judge the angle of rotation of eighty helices defined by the factorial combination of eight phase (phi) values (ie difference between the sinusoidal path of one dot and its neighbours) and ten different angular displacement values (alpha). When in each static frame the dots can be organized into curved dotted line (small values of phi), the perceived 3-D helices are highly nonrigid. But when shape information is not available in each static frame (high values of phi), the helices are perceived as rigid and rotation judgement is possible providing that alpha < 15 degrees. It appears that at small values of phi observers fail to recover the rigid structure of the helices since the input to the structure from the motion process may be distorted. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | STAMPA |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/pmid/8474832; info:eu-repo/semantics/altIdentifier/wos/WOS:A1993KT34000004; volume:22; issue:1; firstpage:23; lastpage:34; numberofpages:12; journal:PERCEPTION; http://hdl.handle.net/11577/2467379Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0027352459; http://www.ncbi.nlm.nih.gov/pubmed/8474832Test |
| DOI: | 10.1068/p220023 |
| الإتاحة: | https://doi.org/10.1068/p220023Test http://hdl.handle.net/11577/2467379Test http://www.ncbi.nlm.nih.gov/pubmed/8474832Test |
| رقم الانضمام: | edsbas.18B9AD3E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1068/p220023 |
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