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ShapeMetriX3D - Fusion of several 3D images
 
  Tunnel face patches
   
 

For merging tunnel face patches each of the single views should show the whole tunnel face. It is important also
to covers a portion (some metres) of the tunnel walls which is used to detect a relationship between the single views.
There is no need for special markers to merge several views – the only requirement is that images show overlapping areas.
  This way several patches can be merged to single 3D image of a tunnel face allowing an assessment and measurements of the whole structure which is not possible in the field.
   
 
 
3D images of a tunnel face. The 3D images are referenced to each other thus can be used for
measurements in a common co-ordinate system (top). Resulting 3D image of the merged
tunnel face images (bottom)