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Proceedings Paper

Topography Moire using phase stepping method with CCD camera
Author(s): Dorota Zawieska
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Paper Abstract

Moire projection method enables non-contact measurement of the shape or deformation of different surfaces and constructions by fringe pattern analysis. The fringe map aquisition of the whole surface of the object under test is one of the main adventage comparing with "point by point" methods. The computer analyzes the shape of the whole surface and next user can select different points or cross sections of the object map. Instananeous image recoquition gives another advantage, measurement of transient events e.g. during technical process. In this paper will be presented a few typical examples of an application of the moire projection techique in solving different medical problems. Equipment for determining posture defects using moire projection onto a CCD camera will be described. Because the analysis of moire images by conventional methods is tedious the moire fringe is digitized and analysed in real time using a phase stepping method. The technique has been applied experimentally for the analysis of osseo-muscular deformities. For this purpose the equipment was installed in The Rehabilitation Clinic for Children and Youth in Katowice.

Paper Details

Date Published: 1 August 1990
PDF: 6 pages
Proc. SPIE 1395, Close-Range Photogrammetry Meets Machine Vision, 13954B (1 August 1990); doi: 10.1117/12.2294398
Show Author Affiliations
Dorota Zawieska, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 1395:
Close-Range Photogrammetry Meets Machine Vision
Armin Gruen; Emmanuel P. Baltsavias, Editor(s)

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