ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-3/W4, 33-40, 2015
http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/II-3-W4/33/2015/
doi:10.5194/isprsannals-II-3-W4-33-2015
© Author(s) 2015. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
11 Mar 2015
THE POTENTIAL OF SPECULAR REFLECTIONS FOR FAÇADE IMAGE ANALYSIS
M. Drauschke1,2 and H. Mayer2 1German Aerospace Center, Institute of Robotics and Mechatronics, Perception and Cognition, Oberpfaffenhofen, Germany
2Bundeswehr University Munich, Institute of Applied Computer Science, Visual Computing, Neubiberg, Germany
Keywords: Façade Images, 3D Reconstruction, Reflection Analysis, Window Detection Abstract. Several approaches for window detection have been proposed in recent years, which all use the window size, shape or position within the façade as characteristics for the detection. In this paper another property of windows is proposed for their detection: Windows are made of glass, so they tend to specularly reflect sun light, while the surrounding wall diffusely reflects it. To this end, colour values in multiple views are analysed to detect specular reflections. In the experiments, walls often show a high homogeneity of small colour differences, and many windows are clearly visible in the form of colour differences. Nevertheless, it is difficult to segment windows from the façade if there is no prior knowledge about the intensity of the scene’s illumination. Promising results are obtained if the façade lies in the shadow, e.g., of another building or a tree.
Conference paper (PDF, 8780 KB)


Citation: Drauschke, M. and Mayer, H.: THE POTENTIAL OF SPECULAR REFLECTIONS FOR FAÇADE IMAGE ANALYSIS, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-3/W4, 33-40, doi:10.5194/isprsannals-II-3-W4-33-2015, 2015.

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