GAP-CLOSING 3D BUILDING RECONSTRUCTION BY ALIGNING BOUNDARIES OF ROOF SEGMENTS AND DETECTING UNCOVERED DETAILS

• Main Authors: M. Pohl, D. Bulatov
• Format: Article
• Language: English
• Published: Copernicus Publications 2015-03-01
• Series: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
• Online Access: http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/II-3-W4/173/2015/isprsannals-II-3-W4-173-2015.pdf

We describe a work flow to border building faces which aims to obtain a detailed and closed building model. Initially, we use the estimated roof planes and the rasterized binary mask of the corresponding inlier set to generate bordering polygons. To close the gaps between the initial boundary polygons and between the polygons and the building ground outline, we introduce an algorithm to align boundaries which successfully works in 2.5D and 3D. To enhance the accuracy of the boundary alignment, we use additional reliable model entities such as cut lines and step lines between the initial estimated roof planes. All gaps that cannot be avoided by this procedure are afterwards covered by a method searching for uncovered details.