ABSTRACT
Reverse engineering (RE) refers to the process that creates a CAD model by acquiring the geometric data of an existing part using a 3D measuring device. Laser scanners are noncontact-type measuring devices that use active scanning methods to capture the 3D shape of a part. Using blue light technology and a 5 megapixel camera to capture images, the Steinbichler Comet L3D is an extremely accurate noncontact scanning device. This 3D scanner uses LED lighting to ensure excellent results despite poor ambient conditions. Preprocessing operations in RE include registration, noise removal, and data reduction steps. In data acquisition, point clouds often contain outlier points or shadow points that complicate further computation and processing. Medical images are generally represented by a voxel dataset constructed by an arbitrary number of slice images. in order to better comprehend the principles of RE, several case studies were presented, showing step-by-step procedures that were taken for the reproduction of objects for which no design data existed.
