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|Title: ||以無人飛行載具拍攝影像建置三維橋梁模型之初步研究;A Preliminary Study on Generation of 3D Bridge Models using Images Captured by Unmanned Aerial Vehicle|
|Keywords: ||無人飛行載具;橋梁檢測;三維橋梁模型;UAV;bridge inspection;3D bridge model|
|Issue Date: ||2016-10-13 15:23:49 (UTC+8)|
|Abstract: ||目前臺灣橋梁管理單位已開始應用無人飛行載具(Unmanned Aerial Vehicle, UAV)協助橋梁檢測作業。因相同橋梁構件多為類似且具相同外型，檢測者單看UAV所拍攝之相片實難以辨識其劣化構件的確切位置，故本研究利用以二維相片建置三維模型之軟體，將UAV拍攝橋梁之相片建置成如同現地之三維橋梁模型，以協助檢測人員之判斷。|
;Using unmanned aerial vehicle (UAV) to assist bridge inspection has become a popular trend in Taiwan. However, since same type of bridge components are similar, it is very difficult to identify the correct position of a deterioration from photos or images captured by the UAVs. Thus, this study aims at generating three-dimensional (3D) models for bridges to facilitate the inspection task using those two-dimensional (2D) images.
Since there are many types of bridge components, the flying routes of the UAV are much more complicate than those for filming land slopes or buildings. In addition, photos with sky or clouds in the background of the under-bridge components such as slabs or piers, often make it very difficult to generate 3D bridge models. The same task is much easier for land slopes or buildings. After many tests in this study, it was concluded that a better 3D bridge model can be obtained under the following conditions: (1) capturing images under soft daylight such as in cloudy days, (2) keeping the camera have a 45 degree with the component, (3) avoiding capturing images of the UAV components, (4) capturing images by a single camera, (5) correcting fish-eye effect images, and (6) overlapping of images with 80% to 90% vertically and 50% to 60% horizontally.
Despite of numerous tests, the 3D bridge models generated in this study are not as precise as expected nor sufficient for inspection use due to the limited capabilities of current UAV, camera, and 3D generation software. However, the research results of this study still provide useful guidance for future study when capabilities of these hardware and software are significantly improved.
|Appears in Collections:||[營建管理研究所 ] 博碩士論文|
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