全波形光达之空间关联波形分析方法;METHOD OF GEOSPATIAL-RELATED WAVEFORM ANALYSIS FOR FULL-WAVEFORM LIDAR

摘要

一种全波形光达之空间关联波形分析方法，系考量邻近波形之空间关系，堆叠邻近波形以提升可靠之地面点弱回波讯号，能有效萃取微弱地表回波资讯，重建完整三维数值地面模型（Digital Elevation Model）。本方法主要包含四步骤：连结空间关联性波形；萃取波形对位参考点；波形对位及堆叠；以及堆叠波形之分析。藉此，本发明利用原始之光达波形讯号，使用相邻讯号进行处理，以空间关联讯号可侦测弱回波讯号且降低杂讯之干扰，并增加点座标及波形参数等资讯，能避免过度参数化即能产生可靠之地面点并提升地面点数量，使地形分析更可靠，进而可在实务模式分析中应用于复杂之森林区，增显地面弱回波讯号，可有效萃取可靠之地面弱回波讯号，以提供更可靠之成果。;A method is provided to analyzegeospatial-related waveform forfull-waveform lidar. The spatial relationships between adjacent waveforms are considered. Adjacent waveforms are stacked to improve reliable weak echo signals of ground points. A complete three-dimensional digital elevation model is reconstructed. Terrain analysis is more reliable. Ground weak echo signals are enhanced to be effectively extracted and so as to provide more reliable results. The present invention can be applied for complex forest model analysis.