Focal Loss for Dense Object Detection in PyTorch

Result
| Method | training set | val set | mAP |
|---|---|---|---|
| Cross Entropy Loss | VOC2007 | VOC2007 | 63.36 |
| Focal Loss | VOC2007 | VOC2007 | 65.26 |
A PyTorch Implementation of Focal Loss.

| Method | training set | val set | mAP |
|---|---|---|---|
| Cross Entropy Loss | VOC2007 | VOC2007 | 63.36 |
| Focal Loss | VOC2007 | VOC2007 | 65.26 |