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mesh-tools

This repository contains tools for reconstructing, processing and evaluating point clouds and triangular surface meshes. The code is based on several scientific publications and makes heavy use of CGAL.

Common interface for all tools

All tools have a couple of common command line parameters. To get a more complete and detailed list of all possible parameters use the help command.

Command	Description
`-h`<img width=180/>	Display a help message, explaining all command line options of the specific tool.
`-w path/to/workingDir`	All input and output files are located inside the specified directory.
`-i inputFileName`	The file name of the input for the tool. The file ending does not have to be specified.
`-o outputFileName`	The file name of the output file(s). If left empty, the input file name is used.
`-e exportOptions`	Specify which files and which properties should be exported.

Available tools

scan

Sample points on a surface mesh using a virtual scanning procedure, e.g. for Deep Surface Reconstruction from Point Clouds with Visibility Information. You can vary the number of scanned points and cameras, and add noise and outliers to the point cloud.

omvs2npz

Extract points, normals and sensor positions from an OpenMVS project file and save them as arrays in a numpy .npz file.

labatut

Reconstruct a 2-manifold surface mesh from a point cloud with visibility information using the algorithm presented in Labatut et al. 2009.

feat

Extract features from a visibility augmented 3D Delaunay triangulation for DGNN. If a ground truth file is specified, ground truth occupancies for each cell of the 3D Delaunay triangulation will also be exported.

occ2mesh

Transform a 3D Delaunay triangulation with cell occupancies as computed by feat or DGNN to a surface mesh.

normal

Estimate (oriented) normals for a point cloud using different algorithms implemented in CGAL.

sample

Sample points on a surface mesh.

collapse

Apply the edge collapse algorithm implemented in CGAL to simplify a triangle surface mesh.

Dependencies

Required

Boost (>= v1.6.5, install with sudo apt install libboost-all-dev)
CGAL (>= v6.0.1)
ZLIB (for reading and writing .npz files, install with sudo apt install zlib)
xtensor (for reading and writing .npz files)
xtensor-io (for reading and writing .npz files)

Optional

OpenMVS (for loading point clouds from an OpenMVS project)
COLMAP (for loading point clouds from a COLMAP project) TODO: needs to be fixed
Open3D (for Marching Irregular Tetrahedra)

Installation

git clone git@github.com:raphaelsulzer/mesh-tools.git
cd mesh-tools
mkdir build && cd build
cmake .. -DCMAKE_BUILD_TYPE=RELEASE -DTOOLX=ON
make -j

where TOOLX is the name of a tool listed above.