Automated defect recognition 1 Automation 1 Contrast-to-noise ratio 1 Deep learning 1 Defect recognition 1 Defects 1 Digital X-ray radiography 1 E-learning 1 Image quality 1 Image quality parameters Learning algorithms 1 Learning systems 1 Non destructive testing 1 Nondestructive examination 1 Performance 1 Radiography images 1 Semantic Segmentation 1 Semantic segmentation 1 Semantics 1 Signal to noise ratio 1 X ray radiography 1 article 1 automated defect recognition (ADR) 1 contrast to noise ratio 1 deep learning 1 digital X-ray radiography 1 experimental study 1 human 1 image quality 1 non-destructive testing 1