Fig. 1. Structural diagram of YOLO v3 network

Fig. 2. Wharf marking at different datasets. (a) DIOR; (b) TGRS-HRRSD; (c)(d) level 19 Google remote sensing image

Fig. 3. PR curve of wharf recognition

Fig. 4. Recognition results of wharves. (a) Original image; (b) local image; (c) recognition of wharf with single ship docked; (d) recognition of wharf with many ships docked; (e) wharf recognition in complex scene; (f) wharf recognition when prescene of flares on sea surface; (g) recognition of jetty wharf; (h) recognition of along-shore wharf; (i)(j) typical misrecognitions

Fig. 5. (a) Port hotspots and (b)--(e) aggregated polygons

Table 1. Comparsion of anchor boxes before and after adjustment

Table 2. Comparison of performances between two models in experimental area

Table 3. Hotspot analysis results under different thresholds