yolov7 add wiou

1. modification

• general.py
• loss.py

2. how to use

# my practice is train_aux
python train_aux.py --workers 8 --device 0 --batch-size 16 --data data/coco.yaml --img 1280 1280 --cfg cfg/training/yolov7-w6.yaml --weights '' --name yolov7-w6 --hyp data/hyp.scratch.p6.yaml

3. Reference

• https://github.com/Instinct323/wiou
• https://blog.csdn.net/qq_55745968/article/details/128888122
• https://blog.csdn.net/athrunsunny/article/details/128872025