Weighted Iterative CD-Spline for Mitigating Occlusion Effects on Building Boundary Regularization Using Airborne LiDAR Data

Author(s)

dos Santos, Renato Cesar ; Habib, Ayman F. ; Galo, Mauricio

• Document type: Journal article
• Source: SENSORS; v. 22, n. 17, p. 18-pg., 2022-09-01.

Abstract

Building occlusions usually decreases the accuracy of boundary regularization. Thus, it is essential that modeling methods address this problem, aiming to minimize its effects. In this context, we propose a weighted iterative changeable degree spline (WICDS) approach. The idea is to use a weight function for initial building boundary points, assigning a lower weight to the points in the occlusion region. As a contribution, the proposed method allows the minimization of errors caused by the occlusions, resulting in a more accurate contour modeling. The conducted experiments are performed using both simulated and real data. In general, the results indicate the potential of the WICDS approach to model a building boundary with occlusions, including curved boundary segments. In terms of F-score and PoLiS, the proposed approach presents values around 99% and 0.19 m, respectively. Compared with the previous iterative changeable degree spline (ICDS), the WICDS resulted in an improvement of around 6.5% for completeness, 4% for F-score, and 0.24 m for the PoLiS metric. (AU)

• FAPESP's process: 20/12481-7 - Regularization of building roof boundaries using CD-spline from LiDAR data
• Grantee: Renato César dos Santos
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 19/05268-8 - REGULARIZATION OF BUILDING ROOF BOUNDARIES FROM LiDAR DATA AND AERIAL IMAGES USING CD-SPLINE CONCEPT
• Grantee: Renato César dos Santos
• Support Opportunities: Scholarships in Brazil - Post-Doctoral