Naoki Katsura

Results 3 issues of Naoki Katsura

Following #448 additional formats - `xyxy` - `xywh` - `xywh_center_norm` - `xyxy_norm` - `xywh_norm` - `xywh_center`

Improvements needed
Branch conflict

From #11. Issue: if you have an optimizer with multiple groups with different learning rates, all of their learning rate values will get overridden by the `max_lr`.

enhancement

From #11. Currently, warmup is applied in all cycles. Therefore, it is possible to apply warmup only in the first cycle by using an argument. Similar to [here](https://github.com/pytorch/pytorch/issues/80308).

enhancement