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Proceedings Paper

Effect of sway on image fidelity in whole-body digitizing
Author(s): Brian D. Corner; Anmin Hu
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Paper Abstract

For 3D digitizers to be useful data collection tools in scientific and human factors engineering applications, the models created from scan data must match the original object very closely. Factors such as ambient light, characteristics of the object's surface, and object movement, among others can affect the quality of the image produced by any 3D digitizing system. Recently, Cyberware has developed a whole body digitizer for collecting data on human size and shape. With a digitizing time of about 15 seconds, the effect subject movement, or sway, on model fidelity is an important issue to be addressed. The effect of sway is best measured by comparing the dimensions of an object of known geometry to the model of the same object captured by the digitizer. Since it is difficult to know the geometry of a human body accurately, it was decided to compare an object of simple geometry to its digitized counterpart. Preliminary analysis showed that a single cardboard tube would provide the best artifact for detecting sway. A tube was attached to the subjects using supports that allowed the cylinder to stand away from the body. The stand-off was necessary to minimize occluded areas. Multiple scans were taken of 1 subject and the cylinder extracted from the images. Comparison of the actual cylinder dimensions to those extracted from the whole body images found the effect of sway to be minimal. This follows earlier findings that anthropometric dimensions extracted from whole body scans are very close to the same dimensions measured using standard manual methods. Recommendations for subject preparation and stabilization are discussed.

Paper Details

Date Published: 6 March 1998
PDF: 10 pages
Proc. SPIE 3313, Three-Dimensional Image Capture and Applications, (6 March 1998); doi: 10.1117/12.302441
Show Author Affiliations
Brian D. Corner, U.S. Army Natick Research, Development & Engineering Ctr. (United States)
Anmin Hu, Ohio Univ. (United States)

Published in SPIE Proceedings Vol. 3313:
Three-Dimensional Image Capture and Applications
Richard N. Ellson; Joseph H. Nurre, Editor(s)

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