*********************************
There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
*********************************
Ph.D. Thesis Defense Announcement
Dr. Russell Gentry (CEE), Dr. Eric Marks (CEE), Dr. W. Hong Yeo (ME),
Dr. Yelda Turkan (Oregon State University)
Date & Time: Nov. 11, 2-4 pm
Location: https://bluejeans.com/321177202
Although building information modeling (BIM) has been widely used in entire construction projects for data exchange between stakeholders, it sometimes rarely represents the current state of the construction sites because most of the information models are built at the design phase. For this reason, several studies have implemented a process to generate as-built BIM by leveraging laser-scanned point cloud data, referred to as Scan-to-BIM. However, the conventional Scan-to-BIM process is usually performed manually or semi-manually, which is time-consuming and labor-intensive. Moreover, captured reality and measurements such as actual dimensions, shapes, colors, and damages of the target subjects that the original point cloud retains can be disregarded during the solid modeling process in Scan-to-BIM. To address this issue, this research proposes an object-oriented information modeling framework for point cloud data, named point cloud information modeling (PCIM).
The main objective of this dissertation is to develop artificial intelligence (AI)-driven information modeling framework for point cloud data. To this end, this study 1) presents methods of classifying construction objects and their properties and 2) proposes a data schema to represent the classified information with an object-based hierarchy structure. At this time, the scope of this research is limited to building construction area, but the data schema can be extended to other jobs such as mechanical, electrical, and plumbing (MEP) engineering. The findings of this research may rebound to the benefit of stakeholders of construction projects considering that point clouds play an essential role in the construction management phase. Since this research will provide an automated information modeling solution for point cloud data, stakeholders that apply the proposed approach will save time to generate an as-is construction site model. Moreover, this research may fill the gaps in current studies on object classification in 3D by leveraging extended input channels such as laser intensity and material index. As this paper presents the concept of PCIM, various follow-up studies are expected to be additionally derived.
