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Proceedings Paper

Reconstruction Of Anatomical Shapes From Moire Contourographs
Author(s): Carl G. Saunders
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Paper Abstract

A Moire system which rotates an object in front of a slit camera has been used to obtain continuous photographic maps around amputee socket and shoe last shapes. Previous analysis methods required the use of IBM 370 hardware and extensive software overhead. Using a systematic manual digitizing technique and user-interactive FORTRAN software, the shape reconstruction has been easily performed on a PDP-11 minicomputer system. Both the digitizing technique and the software are oriented towards the shape reproduction process. Numerically controlled machining parameters are used to identify a "skewed" grid of required points along the cutter path. Linear interpolation and anti-interference techniques resulted in reproduction of shoe lasts to within 0.05 inches (1.2 millimeters) from the sensing axis. Difficulties were experienced in obtaining information to resolve the ends of the shapes. Current efforts focus on circumferential shape sensing of live subjects and automatic digitization of sensed data.

Paper Details

Date Published: 12 July 1983
PDF: 8 pages
Proc. SPIE 0361, Biostereometrics '82, (12 July 1983); doi: 10.1117/12.966005
Show Author Affiliations
Carl G. Saunders, University of British Columbia (Canada)

Published in SPIE Proceedings Vol. 0361:
Biostereometrics '82
Robin E. Herron, Editor(s)

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