G3Point

Granulometry from 3D Point clouds

Based on Steer, Guerit et al. (2022)

Introduction

G3Point is a tool which aims at automatically measuring the size, shape, and orientation of a large number of individual grains as detected from any type of 3D point clouds describing the topography of surfaces covered by sediments.

The tool has been developped initially in Matlab https://github.com/philippesteer/G3Point This repository aims at making a plugin for CloudCompare from the original Matlab tool, also including later developments of the tool, either in Matlab (https://github.com/philippesteer/G3Point_dev) or in Python (https://github.com/p-leroy/g3point_python).

This algorithm relies on 3 main phases:

1. Grain segmentation using a waterhsed algorithm
2. Grain merging and cleaning
3. Grain fitting by geometrical models including ellipsoids and cuboids