hyper-parameters for training keypoint stage && training result of finetune stage

[zht022]

@nashory hi, I noticed that, when training the keypoint stage, you set use_l2_normalized_feature = True, what's the reason of setting this parameters? And what's more, I noticed that you set target_layer = layer3 by default, have you tried target_layer = layer4? If yes, which one is better?

Another question that confused me is, when I train finetune stage directly on google-landmark-dataset-top1k, I got acc1 over 97.5, how about your result on this stage?

Thank you and wait for your answer.