<blockquote>MeshLab, the open source system for processing and editing 3D triangular meshes. It provides a set of tools for editing, cleaning, healing, inspecting, rendering, texturing and converting meshes. It offers features for processing raw data produced by 3D digitization tools/devices and for preparing models for 3D printing. (http://www.meshlab.net)</blockquote>

1. Filters > Cleaning and Repairing > Remove Unreferenced Vertex
2. Filters > Sampling > Mesh Element Subsampling : sample vertex (divide by 2)
3. Filters > Remeshing, Simplification and Reconstructions (surface reconstruction :poisson, octree depth:11, Solver Divide : 10)
4. Filters > Selection > Select Faces with edges longer than : 4.b (triangles) + pinceau rouge
5. Filters > Sampling > Vertex Attribute transfer