Fig. 2.

The architecture of the feature aggregation and refinement network (FARNet). FARNet includes a backbone network (in the pink dashed box), a multi-scale feature aggregation (MSFA) module (in the blue dashed box), and a feature refinement (FR) module (in the brown dashed box). We also give the feature level labels $\left\{L,0,,,L,1,,,L,2,,,L,3,,,L,4,,,L,5\right\}$ at the left side of the figure, and all feature maps at the same horizontal level have the same spatial resolution