Railway Subgrade Defect Automatic Recognition Method Based on Improved Faster R-CNN

Table 4

The ablation experiment of the improvement strategies.

Model ID	Pre-trained model	Feature cascade	ASDN	Soft-NMS	Data augmentation
Model 1	×	×	×	×	×
Model 2	√	×	×	×	×
Model 3	√	√	×	×	×
Model 4	√	×	√	×	×
Model 5	√	√	√	×	×
Model 6	√	√	√	√	×
Model 7	√	√	√	√	√