Point Cloud Processing and Volume Calculation

This Python script allows you to load and process a point cloud, ultimately calculating and displaying the volume of its convex hull.

Dependencies

• Python 3.10.11
• NumPy 1.24.2
• Open3D 0.17.0
• alphashape 1.3.1
• pyvista 0.38.5

pip install -r requirements.txt

How it Works

• The script determines the file path of a specified point cloud file.
• It loads the point cloud and performs voxel down-sampling.
• The script then computes the axis-aligned bounding box of the point cloud and flips the point cloud.
• An alpha shape of the combined points (original and flipped) is computed.
• It generates random points on the faces of the alpha shape.
• The script calculates distances between the original point cloud and the alpha shape and masks the point cloud based on these distances.
• Outliers are removed and the convex hull is computed.
• The convex hull and the point cloud are visualized.
• Finally, the volume of the convex hull is calculated and displayed in both cubic meters and cubic feet.

Additional Configuration

For PyVista backend settings:

In your script, include:

import pyvista as pv
from pyvista import settings
settings.default_backend = 'ipyvtk'  # Set the default backend for PyVista
pv.set_jupyter_backend('trame')  # Set the Jupyter backend for PyVista