Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-2/W3, 639-644, 2017
23 Feb 2017
S. Troisi1, V. Baiocchi2, S. Del Pizzo1, and F. Giannone3 1Parthenope University of Naples, Centro Direzionale Isola C4, Naples, Italy
2Sapienza University of Rome, DICEA, Via Eudossiana 18, 00184 Rome, Italy
3Niccolò Cusano University Via Don Carlo Gnocchi 3, 00166 Rome, Italy
Keywords: Photogrammetry, Videogrammetry, Structure from Motion, Cultural Heritage, 3D modeling, Georeferencing, Visual Navigation Abstract. Actually complex underground structures and facilities occupy a wide space in our cities, most of them are often unsurveyed; cable duct, drainage system are not exception. Furthermore, several inspection operations are performed in critical air condition, that do not allow or make more difficult a conventional survey. In this scenario a prompt methodology to survey and georeferencing such facilities is often indispensable.

A visual based approach was proposed in this paper; such methodology provides a 3D model of the environment and the path followed by the camera using the conventional photogrammetric/Structure from motion software tools. The key-role is played by the lens camera; indeed, a fisheye system was employed to obtain a very wide field of view (FOV) and therefore high overlapping among the frames. The camera geometry is in according to a forward motion along the axis camera. Consequently, to avoid instability of bundle adjustment algorithm a preliminary calibration of camera was carried out. A specific case study was reported and the accuracy achieved.

Conference paper (PDF, 1234 KB)

Citation: Troisi, S., Baiocchi, V., Del Pizzo, S., and Giannone, F.: A PROMPT METHODOLOGY TO GEOREFERENCE COMPLEX HYPOGEA ENVIRONMENTS, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-2/W3, 639-644, doi:10.5194/isprs-archives-XLII-2-W3-639-2017, 2017.

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