A_PyTorch_实现_本地_丢失_focal_loss_pytorch_A_PyTorch_

# Focal Loss for Dense Object Detection in PyTorch  [Focal Loss for Dense Object Detection](https://arxiv.org/pdf/1708.02002.pdf) # Result Method | training set | val set | mAP --- |--- |--- |--- Cross Entropy Loss |VOC2007 | VOC2007 | 63.36 Focal Loss |VOC2007 | VOC2007 | 65.26