Rough Registration of BIM Element Projection for Construction Progress Tracking

Abstract

Monitoring construction progress is essential for project management. A variety of excellent automatic schedule acquisition methods have been proposed, particularly 3D reconstruction. However, both laser-based and image-based 3D reconstruction methods rely on point clouds which have some inherent defects. In this study, a rough registration method was proposed to obtain construction progress. The method does not generate point clouds during the entire process but determines the actual construction progress by registering the target detection results and the projection of building information model elements. The method was tested at the construction sites of commercial and residential buildings. The experimental results indicated that the registration accuracy reached 95.13%. The average external parameter calibration time and the registration time of each image are 18.57s and 50.59ms, respectively. Compared to similar 3D reconstruction methods, the proposed method is realistic, fast, and simple. This provides a promising method for 3D reconstruction from unordered construction-site images.

An Integrated Framework for BIM Development of Concrete Buildings Containing Both Surface Elements and Rebar

“…The existing solutions are mainly rule-based and can be classified into two categories based on the adopted rules: (1) using the element attributes and (2) using the spatial relationships between elements. For the first category, the element attributes (i.e., walls are vertical [30,31], columns are vertical [32], and floor and ceilings are horizontal [33][34][35]) are identified from the segmented point clouds and used to recognize element types. For the second category, typical buildings are constructed with elements that commonly have spatial relationships (i.e., windows and doors are openings in walls [31], the top and bottom constraints of walls are floors and ceilings [4,36], floors are lower than ceilings [33], and slabs, piers, and girders in bridges are from top to down [37]), which are always used as another popular approach to convert point clouds into BIM.…”