Authors: Gaich, A; Pötsch, M; Schubert, W

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Gaich, A, Pötsch, M & Schubert, W 2007, 'Photogrammetry Plus Computer Vision for Rock Mass Characterisation, Bench Face Surveying and Blast Planning', in Y Potvin (ed.), Slope Stability 2007: Proceedings of the 2007 International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering, Australian Centre for Geomechanics, Perth, pp. 511-525,

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Rock mass characterisation is a crucial step in any rock mechanics project. Conventional mapping deals with the visual interpretation of the rock mass as well with getting geometric measurements on the rock structures such as discontinuity orientations. Since 3D images combine visual with spatial data it is a straightforward approach to use them for supporting rock mass characterisation. Especially since drawbacks in the conventional acquisition of the fracture network such as need for manual access, time restrictions, and reproducibility can be overcome. From digital photographs three-dimensional models are built that allow us to measure rock mass features directly. This paper describes a modernised version of the well-known photogrammetric approach enhanced by Computer Vision principles. The advantages of this approach are that zoom lens can be used for measurements, pictures can be taken freehand, and data processing does not require knowledge on photogrammetry. Besides the concept and the measurement possibilities some applications are addressed.

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Poster Session
Slope Stability 2007, Perth, Australia 525

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