Pipe spool recognition in cluttered point clouds using a curvature-based shape descriptor

Automating dimensional compliance control and progress tracking using computer vision has been identified as a central opportunity for improvement in the construction industry. Current 3D imaging sensors provide massive amounts of spatial data that remain underutilized due to the prohibitively time-consuming manual process of extracting usable information. Desired information is typically centered on a specific object of interest within 3D images, so there is a need for construction specific object recognition processes. In this paper, we present an automated method for locating and extracting pipe spools in cluttered point cloud scans. The method is based on local data level curvature estimation, clustering, and bag-of-features matching. Experimental results from two point clouds containing pipe spool objects demonstrate the method's ability to successfully extract spools from cluttered scenes as well as differentiate between similar spools in a single scene. (C) 2016 Elsevier B.V. All rights reserved.