多重疊航測影像中人工建築物三維模型之重建

3-D Building Reconstruction from Multi-view Aerial Images

陳正穎(Cheng-Yin Chen) ； 陳良健(Liang-Chien Chen)

《航測及遙測學刊》 5卷3期 (2000/09) Pp. 1-13

https://doi.org/10.6574/JPRS.2000.5(3).1

摘要

以自動化方式進行立體製圖時，常遇到如遮蔽、陰影或特徵不明顯等資訊不足的情況，此時須將人為判斷與推論的方式與過程程式化。為了減少此種資訊不足的情況，常透過增加幾何、光譜的資訊或加入人為的判斷，來輔助人工建築物特徵萃取或三維模型重建的工作。考量幾何資訊之增加，本研究嘗試利用雙向重疊均約為60%的四重疊影像，進行房屋三維模型的重建工作。主要有二個處理程序，（1）最小二乘法影像匹配：產生數值表面模型（Digital Surface Model）及（2）一序列的處理程序，包括了最鄰近勻化法、多重解析力邊緣偵測、局部最大值邊緣細化、CLR匹配法。利用數值表面模型得到房屋候選區塊，找出每一個房屋候選區塊內的房屋邊界候選點，並進行Hough直線偵測、直線分組與屋角點三維座標之計算。以上處理之各雙像立體對亦完成整合。由實驗結果得知，多重疊航測影像可萃取出較多房屋邊界的資訊，並經由立體匹配得到房屋邊界之三維資訊，進而重建房屋三維模型。另外，在某些條件下，斜頂房屋物空間之缺漏邊界，亦能透過物空間與像空間的轉換，到像空間去搜尋是否有符合條件的直線段，輔助人工建築物三維模型重建工作。

關鍵字

人工建築物三維模型重建 ； 數值表面模型 ； 多重疊航測影像

並列摘要

In an automated procedure for stereoscopic mapping, reasoning is always needed when insufficient information due to occlusions, shadows, or indistinctness of image features is encountered. In order to alleviate the influence of the information insufficiency, it is common to include more geometric or spectral data source to assist the reconstruction for 3-D man-made buildings.Considering the improvement of geometric information, this investigation uses aerial quadruplets with 60% overlap in two perpendicular directions to perform the reconstruction for man-made buildings. Two major components include (1) generation of digital surface model (DSM) by templet matching, and (2) feature extraction and processing such as image smoothing, edge detection, edge thinning, and CLR matching. Based on the blocks extraction from DSM, each potential building is extracted followed by edge detection, Hough transform to detect straight lines, line grouping, and 3-D positioning for building corners. All the stereopairs composed by 4 images are integrated in this study.Experimental results indicate that, as compared to stereopairs quadruplets could be extracted more edge information for better 3-D building reconstruction. In addition, it is also possible to complete the gable roof when only partial edge information is available by using dual searching between image space and object space.

並列關鍵字

3-D building reconstruction ； Digital surface model ； DSM ； Multi-view aerial images