Cloudcompare & PCL platform convex hull method to calculate crown volume

One 、 brief introduction

The idea of this method is also very simple , It is to divide the canopy into several irregular platforms , Sum up the volume of each platform , Approximate crown volume . The general situation is shown in the figure below ：

Two 、 Implementation steps

1、 By slicing the crown point cloud data based on elevation and using the discretized Green formula to solve the area of each slice , This article will use Graham Algorithm to calculate the area of each slice , For details, please refer to this article https://blog.csdn.net/dayuhaitang1/article/details/122821546?spm=1001.2014.3001.5502.
2、 Calculate the volume of each platform , Then put these platforms