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論文名稱
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可見光及紅外熱影像之不同融合法於混凝土橋梁內部劣損檢測研究
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Title
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A Study on Different Fusion Methods of Visible Light and Infrared Thermal Images for Internal Damage Detection of Concrete Bridges
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作者
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張怡茹、高書屏、王豐良、林志憲
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Author
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Yi-Ru Zhang, Szu-Pyng Kao, Feng-Liang Wang, Jhih-Sian Lin
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中文摘要
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橋梁檢測可使用紅外熱影像顯示其內部劣損，但難辨別劣損位置，將其與可見光影像融合，即可獲得影像細節及溫度異常處。本研究使用小波融合 (WT)、拉普拉斯金字塔轉換 (LP)、非下採樣輪廓波轉換 (NSCT)、非下採樣剪切波轉換 (NSST)，對混凝土橋梁內部劣損影像做融合，量測及比較內部劣損面積精度。實驗顯示LP難呈現紅外熱影像訊息，WT、NSCT及NSST能有效融合兩種影像，NSCT在污漬表面能凸顯紅外熱影像。NSCT與其他非破壞性檢測方法得到之面積相差0.057 m^2、0.005 m^2，NSST為0.094 m^2、0.007 m^2，WT為0.153 m^2、0.007 m^2。NSCT與實際面積最相近，且不受橋面污漬影響，故本研究推薦NSCT作為混凝土橋梁檢測使用。
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Abstract
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Bridge inspection can use infrared thermal images to display internal damage, but it is difficult to identify the location of damage. By combining infrared thermal images with visible light images, image details and temperature anomalies can be obtained. This study uses Wavelet Transform (WT), Laplacian Pyramid (LP), Nonsubsampled Contourlet Transform (NSCT) and Nonsubsampled Shearlet Transform (NSST) to fuse reinforced concrete bridge images, measure, and compare the accuracy of internal damaged areas. This study shows that LP is difficult to highlight the information of the original infrared thermal image, WT, NSCT and NSST can effectively integrate visible light image and infrared thermal image, and NSCT can highlight infrared thermal image. The area difference between NSCT and other non-destructive detection methods is 0.057 m^2, 0.005 m^2, NSST is 0.094 m^2, 0.007 m^2, WT is 0.153 m^2, 0.007 m^2. NSCT is the closest to the actual area and is not affected by the stains on the bridge deck, so this study recommends NSCT to be used for the detection of concrete bridges.
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關鍵字
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非破壞性檢測、影像融合、內部劣損檢測
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Keywords
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Nondestructive Testing, Images Fusion, Internal Damage Detection
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