Fig. 1. Detection results of the two algorithms. (a) Algorithm based on bounding box; (b) algorithm based on segmentation

Fig. 2. Overall structure of the network. (a) Backbone; (b) PEFPN; (c) post processing algorithm

Fig. 3. Structure of PEFPN. (a) Top-down; (b) bottom-up; (c) feature fusion

Fig. 4. Generation process of label. (a) Calculation of compression mask; (b) real mask; (c) compression mask

Fig. 5. Effect comparison of verification experiment. (a) VGG+FPN; (b) VGG+PEFPN; (c) Resnet-50+FPN;

Fig. 6. Visualization of network feature maps. (a) Feature map; (b) binary map; (c) result map

Fig. 7. Detection results on different data sets