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Joint location error in two-dimensio...

Chen, Wu-Chou.

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Joint location error in two-dimensional cinematographic analysis.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Joint location error in two-dimensional cinematographic analysis./
作者:	Chen, Wu-Chou.
面頁冊數:	76 p.
附註:	Source: Dissertation Abstracts International, Volume: 53-09, Section: A, page: 3138.
Contained By:	Dissertation Abstracts International53-09A.
標題:	Education, Physical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9301271

Joint location error in two-dimensional cinematographic analysis.
Chen, Wu-Chou.

Joint location error in two-dimensional cinematographic analysis. - 76 p.

Source: Dissertation Abstracts International, Volume: 53-09, Section: A, page: 3138.

Thesis (Ph.D.)--Purdue University, 1992.

Twenty individuals with previous experience in digitizing the segmental endpoints of the human body from film records were used as subjects (plotters) in this study. To control the digitizing image, two 35mm positive slides were used: one with marked segmental endpoints; the other one with unmarked segmental endpoints. The slides were projected to create images that were 5%, 15%, and 30% (small, medium, large) relative to the real height of the individual in the slide. Eight joints were specified for the analysis: right and left knee, hip, elbow, and shoulder joints. The joints were arranged into two paired conditions: the bent versus straight joint condition; the visible versus hidden joint condition. Data were collected for the variation of the X coordinates, variation of the Y coordinates and for accuracy, which was the deviation (D) from the actual segmental endpoint Subjects--Topical Terms:

1018000
Education, Physical.

Joint location error in two-dimensional cinematographic analysis.
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100 1 $a Chen, Wu-Chou. $3 1943330
245 1 0 $a Joint location error in two-dimensional cinematographic analysis.
300 $a 76 p.
500 $a Source: Dissertation Abstracts International, Volume: 53-09, Section: A, page: 3138.
500 $a Major Professor: Carol J. Widule.
502 $a Thesis (Ph.D.)--Purdue University, 1992.
520 $a Twenty individuals with previous experience in digitizing the segmental endpoints of the human body from film records were used as subjects (plotters) in this study. To control the digitizing image, two 35mm positive slides were used: one with marked segmental endpoints; the other one with unmarked segmental endpoints. The slides were projected to create images that were 5%, 15%, and 30% (small, medium, large) relative to the real height of the individual in the slide. Eight joints were specified for the analysis: right and left knee, hip, elbow, and shoulder joints. The joints were arranged into two paired conditions: the bent versus straight joint condition; the visible versus hidden joint condition. Data were collected for the variation of the X coordinates, variation of the Y coordinates and for accuracy, which was the deviation (D) from the actual segmental endpoint $\ rm(D = \sqrt{(x - x\sb0)\sp2+(y - y\sb0)\sp2}).
520 $a In studying the within plotter variations, the plotters seemed to be more consistent for the Y coordinate than for the X coordinate. The plotters appeared to be more consistent for the medium and large image sizes than they were for the small image size. In studying the between plotter variations, the image size appeared to affect the plotter's identification of the actual location of the segmental endpoints for the small-large image pairs and the small-medium image pairs. The plotters, however, were not affected by the medium-large image pairs.
520 $a In studying the digitizing accuracy, D, the plotters appeared to be more accurate for the medium and large image sizes than they were for the small image size. Significant image size by joint condition interactions were found for the X and Y coordinates and for the D values. In the analysis of the paired joint conditions, the plotters seemed less affected by the joint condition for the medium and large image sizes than they were for the small image size and less affected by the visible-hidden joint conditions pairs than they were by the bent-straight joint condition pairs.
520 $a As a result of the findings of this study, film images used for cinematographical analysis should be at least 15% of the actual height of the subject and special care should be given to digitizing specific joints.
590 $a School code: 0183.
650 4 $a Education, Physical. $3 1018000
650 4 $a Education, Technology. $3 1017498
650 4 $a Biology, Anatomy. $3 1021727
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710 2 0 $a Purdue University. $3 1017663
773 0 $t Dissertation Abstracts International $g 53-09A.
790 1 0 $a Widule, Carol J., $e advisor
790 $a 0183
791 $a Ph.D.
792 $a 1992
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9301271