The invention provides a single tree segmentation-biological parameter
estimation method based on a vehicle-mounted
LiDAR point cloud, and belongs to the technical field of urban
landscaping intelligent monitoring. The
point cloud individual tree segmentation
algorithm based on tree geometric feature constraint is designed for solving the problem that individual tree segmentation is difficult due to crown overlapping in an urban scene, and the method takes a tree geometric structure as a constraint, combines
point cloud reflection intensity information, a clustering
algorithm, a main direction index and other means, and obtains the individual tree segmentation
algorithm based on the tree geometric feature constraint. And accurate extraction of trunks and crowns in the scene point cloud is realized. Aiming at the problems of high feature redundancy, poor model
interpretability and the like in an existing
estimation method, a
random forest model is taken as a basis, an adaptive
feature selection algorithm is introduced to improve
variable screening efficiency, hyper-parameters are dynamically adjusted by utilizing pigeon inspired optimization, and generalization and stability of the model are enhanced; an
estimation model used for estimating biological parameters such as
leaf area index,
biomass and carbon reserve is designed.