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isprs archives XLI B5 521 2016

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Figure 1. Algorithm overview for thickness and volume  estimation of sprayed concrete
Figure 3. Example of rock bolt point cloud
Figure 6. Training performance in terms of Mean Squared Error  for autoencoders 1 (Up) and 2 (Down)
Figure 10. Point cloud of signed distances between the two surveying epochs. The last epoch was used as a reference for distance calculation and as a result most of the points are below zero

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