16.13. CGAL tools

ASP distributes in the bin directory the following CGAL tools for manipulating meshes in .ply format, which are produced with the multi_stereo (Section 16.43) and voxblox_mesh (Section 16.75) tools:

- rm_connected_components
- smoothe_mesh
- fill_holes
- simplify_mesh

These tools can be built and used independently of ASP. See the source code and build instructions.

16.13.1. Examples

Remove small connected components from the mesh:

num_min_faces_in_component=100
num_components_to_keep=10
rm_connected_components                  \
  $num_min_faces_in_component            \
  $num_components_to_keep                \
  <input_mesh.ply> <output_mesh.ply>

Mesh smoothing:

num_iter=1; smoothing_time=5e-5; smoothe_boundary=1
smoothe_mesh                                  \
  $num_iter $smoothing_time $smoothe_boundary \
  <input_mesh.ply> <output_mesh.ply>

Hole-filling:

max_hole_diameter=0.8
max_num_hole_edges=100
fill_holes                               \
  $max_hole_diameter $max_num_hole_edges \
  <input_mesh.ply> <output_mesh.ply>

Mesh simplification:

edge_keep_ratio=0.2
simplify_mesh $edge_keep_ratio       \
  <input_mesh.ply> <output_mesh.ply>

It is very strongly recommended to first run these tools on small meshes to get a feel for how they work. Meshlab can be used to inspect the results.