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. 2018 Jun 8;18(6):1881. doi: 10.3390/s18061881

Figure 1.

Figure 1

Overview of the UAV-based crack identification: (a) Generating background model; (b) Image acquisition to scan appearance status; (c) Crack detection using deep learning algorithm; (d) Crack quantification using image processing and (e) Visualization of identified crack on the inspection map.