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Effects of outline shape in object r...

Hayward, William Gordon.

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Effects of outline shape in object recognition.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Effects of outline shape in object recognition./
作者:	Hayward, William Gordon.
面頁冊數:	123 p.
附註:	Director: Micheal Jay Tarr.
Contained By:	Dissertation Abstracts International57-01B.
標題:	Psychology, Experimental. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9615448

Effects of outline shape in object recognition.
Hayward, William Gordon.

Effects of outline shape in object recognition. - 123 p.

Director: Micheal Jay Tarr.

Thesis (Ph.D.)--Yale University, 1995.

One issue in the field of visual cognition concerns the nature of object representations. Viewpoint-specific theories propose that representations are specific to the conditions of viewing, thus encoding information about viewpoint, color, texture, and illumination. Viewpoint-invariant theories propose that representations encode only features of an object that are general across viewing experiences, such as the parts of an object.Subjects--Topical Terms:

517106
Psychology, Experimental.

Effects of outline shape in object recognition.
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100 1 $a Hayward, William Gordon. $3 1260650
245 1 0 $a Effects of outline shape in object recognition.
300 $a 123 p.
500 $a Director: Micheal Jay Tarr.
500 $a Source: Dissertation Abstracts International, Volume: 57-01, Section: B, page: 0734.
502 $a Thesis (Ph.D.)--Yale University, 1995.
520 $a One issue in the field of visual cognition concerns the nature of object representations. Viewpoint-specific theories propose that representations are specific to the conditions of viewing, thus encoding information about viewpoint, color, texture, and illumination. Viewpoint-invariant theories propose that representations encode only features of an object that are general across viewing experiences, such as the parts of an object.
520 $a The seven experiments reported in this dissertation investigate one property of an object, outline shape, that is specific to the viewpoint of an object, and yet in some situations will predict recognition invariance across changes in viewpoint. Experiments 1 and 2 compared recognition of silhouettes to recognition of shaded images of objects, and found almost identical patterns of performance. In Experiments 3 and 4, objects were presented in one viewpoint, and then another that had a similar or dissimilar outline shape as the first. Recognition performance was better when the second viewpoint showed a similar outline shape than if it showed a dissimilar outline shape. Together, the results of these four experiments suggest that recognition of the shaded images was performed largely on the basis of the outline shape of the stimuli.
520 $a Instead of presenting static images of objects, Experiments 5 and 6 used animations of objects appearing to rotate as stimuli. These animations gave subjects a salient cue to depth. In these experiments, outline shape did not mediate recognition. Instead, recognition was invariant across all viewpoints other than the studied viewpoint, regardless of similarity of outline shape.
520 $a Finally, Experiment 7 was designed to predict recognition performance based on changes in outline shape. Although performance was found to decrease with differences in viewpoint, no systematic effects were found for viewpoints at which the outline shape was changed qualitatively.
520 $a In summary, it appears as though at least two processes mediate recognition in these experiments. First, recognition in Experiments 1-4 appears due to viewpoint-specific processes, which include outline shape. Second, a more salient cue to depth leads to invariant recognition for viewpoints not identical to those of study.
590 $a School code: 0265.
650 4 $a Psychology, Experimental. $3 517106
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710 2 0 $a Yale University. $3 515640
773 0 $t Dissertation Abstracts International $g 57-01B.
790 $a 0265
790 1 0 $a Tarr, Micheal Jay, $e advisor
791 $a Ph.D.
792 $a 1995
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9615448