Reconstruction Of Anatomical Shapes From Moire Contourographs

Carl G. Saunders

doi:10.1117/12.966005

12 July 1983 Reconstruction Of Anatomical Shapes From Moire Contourographs

Carl G. Saunders

Proceedings Volume 0361, Biostereometrics '82; (1983) https://doi.org/10.1117/12.966005
Event: 26th Annual Technical Symposium, 1982, San Diego, United States

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.

Citation Download Citation

Carl G. Saunders "Reconstruction Of Anatomical Shapes From Moire Contourographs", Proc. SPIE 0361, Biostereometrics '82, (12 July 1983); https://doi.org/10.1117/12.966005

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