Tree segment

树段───Tree segment

model of grass and tree is described as a set of connected branch segments. Each segment is assumed that one side is fixed and another is free.───草木模型由互相连接的离散段组成，每个离散段一端固定，一端自由。

method of image segmentation and feature extraction is to segment a individual tree from its surrounding sceneries in the photography image of the woodland, and mark the feature points.───图像分割和特征提取，是将摄影图像里的目标物体与其周围的景物分割，并且获取其特征点数据的方法和技术。

This problem is a variant of the Josephus problem which can be solved with segment tree.───这个问题是约瑟夫问题的一个变种，可以用线段树解决。