“…Single-stage methods based on deep learning techniques account for the largest proportion among the methods. They include Faster R-CNN [23], [77], Context-Attention R-CNN [47], InceptionV3 [78], MobileNet [60], SSD [79], YOLO [80], YOLOv2 [42], YOLOv3 [26], [29], [50], [81], [82], YOLOv4 [31], [51], [83], [84], YOLOv5 [85]- [88], and others [11], [41], [46], [52], [89]- [94], etc. It can be clearly concluded that YOLO and its variants are used widely.…”