Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-3/W3, 109-114, 2015
http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-3-W3/109/2015/
doi:10.5194/isprsarchives-XL-3-W3-109-2015
© Author(s) 2015. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
19 Aug 2015
A SEMI-AUTOMATIC PROCEDURE FOR TEXTURING OF LASER SCANNING POINT CLOUDS WITH GOOGLE STREETVIEW IMAGES
J. F. Lichtenauer1 and B. Sirmacek2 1Laan der Vrijheid 92, 2661HM Bergschenhoek, the Netherlands
2Department of Geoscience and Remote Sensing, Delft University of Technology, Stevinweg 1, 2628CN Delft, the Netherlands
Keywords: Point Clouds, Terrestrial Laser Scanning, Structure from Motion (SfM), Texturing, Google Streetview Abstract. We introduce a method to texture 3D urban models with photographs that even works for Google Streetview images and can be done with currently available free software. This allows realistic texturing, even when it is not possible or cost-effective to (re)visit a scanned site to take textured scans or photographs. Mapping a photograph onto a 3D model requires knowledge of the intrinsic and extrinsic camera parameters. The common way to obtain intrinsic parameters of a camera is by taking several photographs of a calibration object with a priori known structure. The extra challenge of using images from a database such as Google Streetview, rather than your own photographs, is that it does not allow for any controlled calibration. To overcome this limitation, we propose to calibrate the panoramic viewer of Google Streetview using Structure from Motion (SfM) on any structure of which Google Streetview offers views from multiple angles. After this, the extrinsic parameters for any other view can be calculated from 3 or more tie points between the image from Google Streetview and a 3D model of the scene. These point correspondences can either be obtained automatically or selected by manual annotation. We demonstrate how this procedure provides realistic 3D urban models in an easy and effective way, by using it to texture a publicly available point cloud from a terrestrial laser scan made in Bremen, Germany, with a screenshot from Google Streetview, after estimating the focal length from views from Paris, France.
Conference paper (PDF, 9718 KB)


Citation: Lichtenauer, J. F. and Sirmacek, B.: A SEMI-AUTOMATIC PROCEDURE FOR TEXTURING OF LASER SCANNING POINT CLOUDS WITH GOOGLE STREETVIEW IMAGES, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-3/W3, 109-114, doi:10.5194/isprsarchives-XL-3-W3-109-2015, 2015.

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