Free-form surfaces and profiles have broad applications in modern engineering. Due to
better functionality and aesthetic reasons, many components used for biomedical, aerospace and
automobile applications are composed of free-form shapes. Parametric formulations like Bezier,
B-Spline and NURBS are used to model the free-form components and form an integral part of
modern CAD software. The modelled components are physically realized through various
manufacturing processes and inspected using modern inspection devices like Co-ordinate
Measuring Machines (CMM) and non-contact scanners. The measured data of these inspection
devices is represented by point sets, and this data needs to be processed and compared with the
reference objects. Fast and accurate algorithms are necessary for this purpose. In this aspect, various
computational geometric techniques (that have low execution time) are promising. This research
aims to modify and apply such techniques for free-form profiles and surface inspection.
In this direction, a Voronoi diagram-based framework developed to inspect 2D free-form
profiles is being presented in this seminar. The developed framework is suitable for 2D profiles
measured using CMM operated in continuous scanning mode and non-contact scanners. The
developed framework consists of two stages. Implementations were done with experimental data
obtained by measuring machined profiles using a non-contact scanner.