Defects 3 Semantics Defect detection 2 Feature extraction 2 3D printers 1 Additives 1 Aerial imagery 1 Aerial photography 1 Aircraft detection 1 Antennas 1 CenterNet 1 Centernet 1 Centralised 1 Convolution 1 Convolutional neural networks 1 Data privacy 1 Defect-detection systems 1 Detection accuracy 1 Detection algorithm 1 Feature map 1 Features fusions 1 Federated learning 1 Fine-scale 1 High speed trains 1 Image enhancement 1 Insulator defect detection 1 Insulator detection 1 Learning systems 1 Local semantics 1 Location information 1