非測定用 카메라에 依한 圓形構造物의 精密 測定에 關한 硏究

국문 초록 (Abstract)

本 論文은 域上寫眞測賃에서 撮影基綿長의 變化가 誤差傳播에 미치는 影響을 규명하여 보다 이상적인 影據條件을 제시하기 위한 것이다.
P3l測定用 사진기에 依해 얻은 陰晝로 부터 機械座標를 求하고 affine 변환에 의해 寫眞座標를 구해 collinearity condition에 의한 bundle ad-justment로 標定點의 3차원좌표와 標準誤差를 比較 分析함으로써 握影距離에 따른 기선변화가 誤差傳播에 미치는 영향을 直角水平 및 偏心의 경우로 分類하여 考奈하였다.
重複度가 80%에서 70%로 변화할 때 X,Y,2의 標準誤差는 各各 約 9.8%, 24.4%, 30.7%로 감소되며, 70%에서 60%로 변화할 때 X.Y,2의 標準誤差는 5.6 %, 14.8 %, 21.9 %의 감소현상을 나타내므로 기선변화는 淸度解析에 중요한 의미를 가진다. 또 直角水平인 경우 실제 data에 의한 標準誤差는 simulation標準誤差보다 정도가 양호하나 偏心의 경우는 정도가 낮으므로 攝影方法도 정도에 큰 영향을 미친다.
雌上寫眞에서 解情的 方法은 標定에 의한 方法보하 높은 精度의 解析이 能하므로 精密測定을 要하는 各種 構造物의 位置解析에 널리 이용될 것으로 기대된다.

다국어 초록 (Multilingual Abstract)

Whereas the ground surface which only needs one side analysis by aerial photogrammetry, the terrestrial structures require all-sides analysis. Therefore, the development of ideal and precise analytical techniques are urgently needed.
If we use a non-metric camera for the purpose of measurement, it has disadvantages which resolution is lower and lens distortion is larger, while it has advantages which are portability, economical and easy to deal with. In this study, it was to be suggested application propriety of the non-metric camera to measurement . to be found out characteristics of accuracy due to the changes of the number and configuration of control points , object distance and combined strips in non-metric camera case in comparison with those in metric camera case. For these purposes. a cylindrical structure was taken as an object, for which circle strips were formed.
The major findings of this study were as follows :
The number and configuration of control points affect analysis of cylindrical structure significantly.
Through analyzing by Bundle Adjustment of circle strip , unknown points on all-sides of object could be positioned. Especially, it is expected to reduce dramatically difficulties of control survey because unknown points on all-sides of object can be positioned employing only one-side with some control points . As a result of analysis of non-metric camera case with20 control points , positional error decrease dramatically as object distance decrease and the number of combined strips increase : 23580m at L5m (1 strip) ,12480m at l0m (2 strip) , 735 ㎛ at 7m(3 strip) object distance. Positional error of non-metric camera 7m(3 strip) case were Lower than 882 ㎛ of metric camera 15m(1strip) case, therefore, it is expected to obtain accuracies of non-metric camera case as much as those of metric camera case if we employ multiple method at closer object distance even with non-metric camera.

목차 (Table of Contents)

• 목차
• Libt of Figures = iii
• Libt of fables = v
• Libt of Sybols = vii
• 國文抄錄 = x
• I.序論 = 1
• 1.1 硏究 目的 = 1
• 1.2 硏究動向 = 2
• 1.3 硏究方法 및 範圍 = 2
• II. 解析理論 = 3
• 2.1 非測定用 카메라의 Calibration = 5
• 2.2 寫眞座標 計算 = 9
• 2.2.1 機械座標 補正 = 9
• 2.2.2 主點 補正 = 10
• 2.2.3 對稱 렌즈의 歪曲 補正 = 10
• 2.2.4 非對稱 렌즈의 歪曲 補正 = 12
• 2.2.5 Affine 變換 = 13
• 2.3 3次元 位置 解析 = 15
• 2.3.1 直接 線形 變換 (DLT)의 解析理識 = 15
• III. 觀測 = 17
• 3.1 基礎 實驗 = 23
• 3.2 本 實驗 = 23
• 3.2.1 攝影 計劃 = 24
• 3.2.1.1 被寫體 選定 = 24
• 3.2.1.2 基準點 및 Target 配置 = 25
• 3.2.1.3 露出點 配置 = 26
• 3.2.2 基準點 測量 = 34
• 3.2.3 撮影 = 36
• 3.2.4 外部 標定要素 決定 = 36
• 3.2.5 機械座標 測定 및 寫眞座標 變換 = 37
• 3.2.6 3次元 座標計算 및 正確叢 解析 = 39
• IV. 結果의 比도 分析 = 40
• 4.1 基準點數에 따른 誤差 特性 = 40
• 4.2 距雜 輕重率과 strip數에 따른 誤差 特性 = 49
• 4.3 測定用 카떼라와 非測定用 카메라의 正度 比較 = 55
• V. 結論 = 64
• FEFERENCE = 65
• ABSTRACT = 71