Skip navigation

DSpace JSPUI

DSpace preserves and enables easy and open access to all types of digital content including text, images, moving images, mpegs and data sets

Learn More
DSpace logo
English
中文
  • Browse
    • Communities
      & Collections
    • Publication Year
    • Author
    • Title
    • Subject
  • Search TDR
  • Rights Q&A
    • My Page
    • Receive email
      updates
    • Edit Profile
  1. NTU Theses and Dissertations Repository
  2. 工學院
  3. 土木工程學系
Please use this identifier to cite or link to this item: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/53160
Title: 以強度資訊進行多時期車載光達點雲特徵匹配與改正
Feature Matching and Adjustment for Multi-Epoch Mobile LiDAR Point Clouds Based on Reflective Intensities
Authors: Yi-Yen Peng
彭翊雁
Advisor: 韓仁毓(Jen-Yu Han)
Keyword: 車載光達系統,慣性導航系統,反射強度值,影像增顯,影像匹配,自適應分段改正,
Mobile LiDAR system,Inertial navigation system (INS),Intensity,Image enhancement,Image matching,Adaptive time-variant adjustment,
Publication Year : 2015
Degree: 碩士
Abstract: 車載光達系統於衛星訊號受到遮蔽時,由於慣性導航系統獨立估算載具位置與姿態之誤差將隨時間累積,使得點雲資料之誤差行為不僅具有累積性也與訊號遮蔽時段有關,因此須對點雲進行自適應分段改正。本研究採用路面標線特徵作為自適應分段改正之共軛點,由萃取之路面點雲產製強度影像,並利用影像增顯提升路面特徵之辨識度與對比度,再由影像共軛匹配技術獲取共軛特徵點並反投影回三維空間,以動態門檻之粗差偵測策略提升共軛匹配點之正確性,最後,進入自適應分段改正之流程。實驗成果顯示,所提出的方法可提供精確且足夠的共軛特徵,以利後續自適應分段改正,而多時期點雲間之誤差則可由數十公分之誤差下降至公分等級,能有效消除衛星訊號遮蔽造成之誤差。
Mobile LiDAR systems have been widely used in collecting 3D spatial information due to its high efficiency. However, its positioning quality relies on a good reception of GNSS signals. Therefore, point clouds positioning error accumulates with time when GNSS signal is obstructed. This study presents a fully automatic intensity-based multi-epoch mobile LiDAR point clouds matching and adjustment procedure. The experiment results indicated that the proposed frameworks can provide accurate and sufficient features for the adaptive time-variant adjustment and help to improve the positioning quality for the LiDAR point clouds acquired in a GNSS signal obstructed area. Consequently, the mobile LiDAR systems can be extended to a wider field of applications.
URI: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/53160
Fulltext Rights: 有償授權
Appears in Collections:土木工程學系

Files in This Item:
File SizeFormat 
ntu-104-1.pdf
  Restricted Access
7.14 MBAdobe PDF
Show full item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

社群連結
聯絡資訊
10617臺北市大安區羅斯福路四段1號
No.1 Sec.4, Roosevelt Rd., Taipei, Taiwan, R.O.C. 106
Tel: (02)33662353
Email: ntuetds@ntu.edu.tw
意見箱
相關連結
館藏目錄
國內圖書館整合查詢 MetaCat
臺大學術典藏 NTU Scholars
臺大圖書館數位典藏館
本站聲明
© NTU Library All Rights Reserved