This code is not our work, it's our way of reproducing the Yun Ting's work from Remote Sensing of Environment by trying to understand their methods.
The information of this work is below:
Article: **Individual tree crown segmentation from airborne LiDAR data using a novel Gaussian filter and energy function minimization-based approach**
Authors: Ting Yun, Kang Jiang, Guangchao Li, et al.
Citation: Yun T, Jiang K, Li G, et al. Individual tree crown segmentation from airborne LiDAR data using a novel Gaussian filter and energy function minimization-based approach[J]. _Remote Sensing of Environment_, 2021, 256: 112307.