Using Context to Create Semantic 3D Models of Indoor Environments

Semantic 3D models of buildings encode the geometry as well as the identity of key components of a facility, such as walls, floors, and ceilings. Manually constructing such a model is a time-consuming and error-prone process. Our goal is to automate this process using 3D point data from a laser scanner. Our hypothesis is that contextual information is important to reliable performance in unmodified environments, which are often highly cluttered. We use a Conditional Random Field (CRF) model to discover and exploit contextual information, classifying planar patches extracted from the point cloud data. We compare the results of our context-based CRF algorithm with a context-free method based on L2 norm regularized Logistic Regression (RLR). We find that using certain contextual information along with local features leads to better classification results.

• Type: Journal
• Year: 2010
• Where: BMVC
• Authors: Xuehan Xiong, Daniel Huber
• Keywords: BMVC 2010, Computer Vision, Context-based Crf Algorithm, Contextual Information, Semantic 3D Models