Errors in Training, 0 or Nan mAP, Low Loss, Tutorial Config

Please use below spec to train.
It runs with resnet18 backbone, bs4 and totally 120 epochs.Train_bird.txt (3.1 KB)
It can fix your issue.

When it runs at 30th epoch, the mAP is already 85%.

In the end, the training result is 92.9396%.

Epoch 120/120

Validation cost: 0.000202
Mean average_precision (in %): 92.9396

class name average precision (in %)


bird 92.9396

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