Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-2/W7, 903-908, 2017
https://doi.org/10.5194/isprs-archives-XLII-2-W7-903-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
 
13 Sep 2017
REGION-BASED BUILDING ROOFTOP EXTRACTION AND CHANGE DETECTION
J. Tian, L. Metzlaff, P. d’Angelo, and P. Reinartz German Aerospace Center (DLR), Remote Sensing Technology Institute, 82234 Wessling, Germany
Keywords: Rooftop extraction, change detection, segmentation, DSM Abstract. Automatic extraction of building changes is important for many applications like disaster monitoring and city planning. Although a lot of research work is available based on 2D as well as 3D data, an improvement in accuracy and efficiency is still needed. The introducing of digital surface models (DSMs) to building change detection has strongly improved the resulting accuracy. In this paper, a post-classification approach is proposed for building change detection using satellite stereo imagery. Firstly, DSMs are generated from satellite stereo imagery and further refined by using a segmentation result obtained from the Sobel gradients of the panchromatic image. Besides the refined DSMs, the panchromatic image and the pansharpened multispectral image are used as input features for mean-shift segmentation. The DSM is used to calculate the nDSM, out of which the initial building candidate regions are extracted. The candidate mask is further refined by morphological filtering and by excluding shadow regions. Following this, all segments that overlap with a building candidate region are determined. A building oriented segments merging procedure is introduced to generate a final building rooftop mask. As the last step, object based change detection is performed by directly comparing the building rooftops extracted from the pre- and after-event imagery and by fusing the change indicators with the roof-top region map. A quantitative and qualitative assessment of the proposed approach is provided by using WorldView-2 satellite data from Istanbul, Turkey.
Conference paper (PDF, 1640 KB)


Citation: Tian, J., Metzlaff, L., d’Angelo, P., and Reinartz, P.: REGION-BASED BUILDING ROOFTOP EXTRACTION AND CHANGE DETECTION, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-2/W7, 903-908, https://doi.org/10.5194/isprs-archives-XLII-2-W7-903-2017, 2017.

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