Monday 25 February 2013

Cloud distance tool.

I was working on different SfM/IBM of a grave we dug in 2010. we have the documentation of four different levels (see picture below). It was a complex archaeological context, with two skeletons buried in different times (double burial), both partially destroyed by the construction of the Renaissance apse. Moreover the tomb was built on the side of a prehistoric house.

I tried to rectify the point clouds inside CloudCompare v. 2.4 (normally i use GRASS with the ply importer addon or MehLab) and I discover this fantastic tool: compute cloud/cloud distance. It can calculate the distance between two different overlapping mesh, similarly to the GRASS command "r.mapcalc". As you can see in the pictures below, the distance analysis between the first and the last documentation can represent the quantity of removed ground. It could be really useful for analysis of damages in buildings.

first point cloud

fourth point cloud

cloud/cloud distance

cloud/cloud distance over the fourth point cloud


  1. "It could be really useful for analysis of damages in buildings.". Right on!!! I already tested with success in that field. You can also use it to obtain interesting topographic height maps created from aerial photos (ex. drones).

    see cc manual, pages 11 and 23:


  2. Hi Ricardo,
    i didn't think about this possibility.
    thank you

  3. Alessandro could you make a kind of tutorial with the steps to make that.


    1. Hi Roger Leonardo,
      in this tutorial (after 6 minutes of the movie) of ForensicAnimation you can find the steps to do it:



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