Volume II-3/W4
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-3/W4, 173-180, 2015
https://doi.org/10.5194/isprsannals-II-3-W4-173-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-3/W4, 173-180, 2015
https://doi.org/10.5194/isprsannals-II-3-W4-173-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

  11 Mar 2015

11 Mar 2015

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

M. Pohl and D. Bulatov M. Pohl and D. Bulatov
  • Fraunhofer Institute of Optronics, System Technologies and Image Exploitation, Gutleuthausstr. 1, 76275 Ettlingen, Germany

Keywords: 3D building reconstruction, polygon alignment, cut lines, step lines, boundary of roof faces, uncovered details

Abstract. 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.