Digital Photogrammetry Applying to Reverse Engineering

In reverse engineering (RE) or rapid prototyping of a complex 3D object, there is often a need to scan a complete 3D model using laser digitizers. However, most digitizers scan objects in a 2.5D way such that the multiple data sets need to be aligned and integrated. In this paper a kind of new method applying to RE which composed of digital close-range industrial photogrammetry and surface scanner technology is proposed. Where un-coded points and coded-points attached on the surface of parts can be figured out and the complete un-coded points are exported using photogrammetry system XJTUDP. The surface scanner system XJTUOM is according to the complete area un-coded points, every piece of points-cloud may be aligned automatically. Then 3D data of the object surface and CAD model of part are acquired precisely using post-processing software of RE. Experiment studies of garbage processor show that the approach possesses good accuracy and satisfy the requirement of RE.