Inspection 23 Visual inspection 7 Computer vision 5 Deep learning 4 Feature extraction 4 Image enhancement 4 Nondestructive examination 4 UAV 4 Unmanned aerial vehicles (UAV) 4 human 4 path planning 4 Antennas 3 Classification (of information) 3 Defects 3 Large-scales 3 Simple++ 3 Ultrasonic testing 3 article 3 deep learning 3 inspection 3 3D digitizing 2 Adaptive complex group lasso 2 Aircraft 2 Automation 2 Autonomous vehicles 2 Bridge inspection 2 Building inspection 2 Building inspections 2 COVID-19 2 Classification system 2