deep-learning backbone pytorch transformer yolo attention yolov3 anchor-free tood yolov4 yolov5 ppyolo scaledyolov4 yolor yolox anchor-based yolov6 yolov7 ppyoloe yoloair

computer-vision object-detection tal anchor-free one-stage-detector tood dense-object-detection iccv2021 t-head iccv21 task-alignment sample-assignment task-aligned-loss anchor-based task-alignment-metric

deep-learning python3 pytorch yolo object-detection retinanet fpn focal-loss pytorch-implementation fcos anchor-free yolov5 yolox anchor-based yolov7 yolov8