中文摘要：

小光斑激光雷达可以同时获得森林的垂直及水平结构参数，因光斑直径较小，可以做到森林单木结构参数的准确估计，进而推广到样方甚至更大区域森林结构参数的估计，近年来在林业中得到广泛应用。文中主要从树高估计方面对小光斑激光雷达在林业中的应用进行研究，通过对先前类似文献进行归纳总结发现，在小光宽激光雷达估测森林树高方面仍存在着一些问题，从而限制了森林树高估测精度的提高，如点云分类算法、点云密度、森林郁闭度、单木的准确分割等，还对小光斑激光雷达估计森林树高中所存在的问题进行了概括．并提出了改进建议。

英文摘要：

Small footprint LiDAR can simultaneously get both vertical and horizontal forest structure parameters and help accurately estimate the structural parameters of single tree owing to its smaller footprint size, and therefore it can be used in plots and even larger regions. Because of this, it has been widely used in forestry in recent years. This paper studied the tree height estimate using small footprint LiDAR. Based on literature reviews, the problems limiting the accuracy of forest tree height estimate were listed, including point cloud classification algorithm, point cloud density, forest canopy density, individual tree segmentation and so on. Finally, some solutions to the problems were put forward.