全波形光達之空間關聯波形分析方法Method of geospatial-related waveform analysis for full-waveform lidar

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

102138819

專利證號

I 477801

專利獲證名稱

全波形光達之空間關聯波形分析方法Method of geospatial-related waveform analysis for full-waveform lidar

專利所屬機關 (申請機關)

國立交通大學

獲證日期

2015/03/21

技術說明

一種全波形光達之空間關聯波形分析方法，係考量鄰近波形之空間關係，堆疊鄰近波形以提升可靠之地面點弱回波訊號，能有效萃取微弱地表回波資訊，重建完整三維數值地面模型（Digital Elevation Model）。本方法主要包含四步驟：連結空間關聯性波形；萃取波形對位參考點；波形對位及堆疊；以及堆疊波形之分析。藉此，本發明利用原始之光達波形訊號，使用相鄰訊號進行處理，以空間關聯訊號可偵測弱回波訊號且降低雜訊之干擾，並增加點座標及波形參數等資訊，能避免過度參數化即能產生可靠之地面點並提升地面點數量，使地形分析更可靠，進而可在實務模式分析中應用於複雜之森林區，增顯地面弱回波訊號，可有效萃取可靠之地面弱回波訊號，以提供更可靠之成果。 Waveform lidar provides geometric and waveform properties from the entire returned signals. The waveform analysis is an important processing for waveform lidar. It is used to extract attributes of reflecting surface from waveform. The traditional waveform analysis is a 1-D processing. The proposed method analyzes the geospatial relationship between return signals by combining the sequential waves. The idea of this method is to analyze the waveform parameters from sequential waves. Since the adjacent return signals are geospatially correlated, they have similar waveform properties that can be used to validate the correctness of extracted waveform parameters. This method is able to detect the weak returns from complex forest area. In addition, it will increase the accurate ground point efficiency.

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