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頁籤選單縮合
題名 | Automatic Selection of Ground Points for Dem Generation from Airborne Lidar Data=自動選取空載光達地面點以建立數值高程模型 |
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作者姓名(中文) | 陳良健; 邵怡誠; | 書刊名 | 中國土木水利工程學刊 |
卷期 | 19:4 2007.12[民96.12] |
頁次 | 頁625-636 |
分類號 | 440.98 |
關鍵詞 | 空載光達; 數值高程模型; 過濾; 橋梁偵測; Airborne light detection and ranging; Airborne lidar; Digital elevation model; Dem; Filtering; Bridge detection; |
語文 | 英文(English) |
中文摘要 | 空載光達系統已發展成為一個強有力的儀器,可用於獲取高精度且高密度的三維地形點。空載光達資料為涵蓋地貌、植被及地上人工物之點雲資料,而產製數值高程模型為其最重要之應用項目。為產生數值高程模型,必須自空載光達資料中萃取出地面點。本文提出一個包含選取地面點及偵測橋梁的自動處理架構,並測試兩組資料以驗證其處理成果。 |
英文摘要 | The airborne Light Detection and Ranging (LiDAR) system has been developed into a powerful instrument, which is capable of acquiring high accuracy and high density 3D terrain points. An airborne LiDAR data generates point clouds distributed over surfaces of bare earth, vegetations, as well as artificial above-ground objects. The generation of digital elevation models (DEM) is the most important application of airborne LiDAR data. To generate a DEM, points on bare earth, i.e. ground points should be extracted from airborne LiDAR data. In this paper, a scheme is proposed for the selection of ground points, and for bridge detection. Two data sets are tested to validate the process. The first set was released by the ISPRS Working Group III/3. The results are quantitatively compared with several recognized counterparts. The second data set comprises three areas in southern Taiwan. The accuracy of the generated DEM is evaluated. The presentation of the terrain features is also analyzed. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。