中文摘要：

DEM提取是机载LiDAR数据处理的基础问题,总结国内外LiDAR滤波方面的研究进展,定量分析算法的性能,着重分析形态学方法和基于内插的方法并指出两种算法的互补性,并总结展望,为后续相关研究提供参考。

英文摘要：

Filter of airborne LiDAR data is a primary step of data processing.This paper reviews the literatures of filter algorithms from aspects of theory and performance.The morphology and interpolation-based methods are introduced especially.In addition,prospect is also given to provide references for future research.