Reverse engineering is the process of creating a CAD model and a manufacturing database for an existing part or a prototype. This process is necessary in redesign of existing parts and for automated inspection. In this paper a unique approach to reverse engineering is proposed. Here the part to be modeled is viewed from two othogonal view points. One camera captures the top view of the object while the other camera captures the four side views by rotating the object in steps of 90 degrees. The images are processed and the orthographic views are created. A 3D line drawing of the object is then recreated by matching points in the orthographic views. This paper describes the developed feature extraction procedure, camera calibration method, and the matching technique. Sample results are also given.
"Building a 3D wireframe CAD model for an existing prismatic part", Proc. SPIE 2598, Videometrics IV, (13 September 1995); doi: 10.1117/12.220913; https://doi.org/10.1117/12.220913