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以數位影像量測法觀測岩坡動態變動之研究

Applying Digital Vision Metrology to Monitor the Behavior of Rock Slopes

摘要


本研究主要探討觀測反射標的影像二維座標,利用反射標的、透視中心及反射標的影像共線的基本原理,以照相機位置、位態(角度)以及影像畸變參數為未知數,進行反射標的三維座標最小二乘平差法計算。求解時為了取得未知數的初始值,本研究結合DLT理論(Direct Linear Transformation)開發一套新初始值解法。一般在利用數位影像量測岩盤邊坡變形時必須設置多處反射標的,並拍攝多張像片,本研究所提出的DLT理論,能夠在廣闊觀測範圍情況下快速求出所有初始值,本文也利用實地驗證及案例分析驗證數位影像量測在岩盤邊坡監測的適用性。

並列摘要


We have studied the slope monitoring method using digital vision metrology. This study developed a technique for measuring the deformation of a slope without setting any fiducial points. The method of simply obtaining initial approximations of coordinate values from the images is applied to the new measurement technique. This measurement method has the advantage of obtaining the three coordinates of many measurement points at cheap cost. In this paper, the precision of the measurement values obtained by the proposed technology is verified in the actual rock slope. The feasibility based on the experimental results to the design of countermeasure construction is discussed.

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