Fig 3 in paper

[yyyzzzhao]

I have some doubts about Fig 3 in paper. How is the layer index defined in resnet50 and how to calculate the value of Mean and Variance. Thank you.

[BeSpontaneous]

Hi,

(1) As illustrated in the caption of Fig. 3, the statistics are calculated from the fourth stage of ResNet-50 and ResNet-50 has 3 bottlenecks at the 4th stage which consists of 9 layers.
(2) Mean and Var can be obtained from the pre-trained model in PyTorch such as:
mean = model.module.base_model.layer4[0].bn1.running_mean
var = model.module.base_model.layer4[0].bn1.running_var

[yyyzzzhao]

thanks a lot for your reply.