DEVELOPMENT OF VOLUME MODEL OF IRREGULAR SHAPED OBJECTS FOR NUMERICAL SIMULATIONS USING SHAPE-FROM-SILHOUETTE METHOD

T. Doktor, D. Kytýr, P. Zlámal, O. Jiroušek

Abstract

This paper deals with development of the volume model of irregular specimens using optical projections. A sequence of 360 projections of the specimen was acquired and processed using a custom set of procedures developed in MatLab environment. The projections were segmented, filtered and smoothed. A semiautomatic procedure was used to calibrate scale of the projections and to remove eccentricity of axis of rotation of the specimen. The volume model was obtained using inverse Radon transform. Additional procedures were developed to obtain crosssection characteristics required for evaluation of corresponding micromechanical test. For verification of the developed procedure volume models of known shaped objects were estimated and compared.

Keywords

micromechanical testing, optical methods, shape from silhouette, volume model development

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DOI

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IMEKO TC

TC15 - Experimental Mechanics

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