Reconstructing feature-based CAD models based on point cloud morphology
Abstract
Reverse engineering, the process of obtaining a geometric CAD model from measurements obtained by scanning an existing physical model, is widely used in numerous applications, such as manufacturing, industrial design and jewellery design. In this work we propose a framework for reverse engineering objects of mechanical or freeform design to obtain fully editable feature-based CAD model that can be reproduced or modified before production. We focus on the process of detecting features on a point cloud and we present efficient methods for analyzing the morphology of the surface defined by the point cloud. We compute a point wise characteristic called point concavity intensity and we use this quantity along with the variations in the surface normal to detect regions corresponding to object features. The boundaries of the regions representing features are extracted and approximated by a collection of piecewise cubic rational Bezier curves that best fit the detected border point cloud and a ...
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