关键词: 遥感, 数字摄影测量, 三维建模

Abstract: Propose a kind of new hillside forest modeling method，get the sequence ground images from hillside forests covered with trees，utilize image segmentation to realize the automatic identification of tree information，through point cloud based on constraint conditions of the ground region，extract the algorithm to obtain concentrated point cloud in high precision on ground，finally apply cubic Beta spline model for three times to achieve hillside forest contour modeling.This method applies the photogrammetry technology into hillside forest modeling，resolves the difficulty in not modeling to the ground with trees occlusions and improves the efficiency of hillside forest modeling.

Key words: remote scensing, digital photogrammetry, 3D modeling