x_feature = VGG((x + 1) / 2)

[fbiying87]

I have a question regarding the input of the VGG network.
Is the (x+1)/2 used as some kind of scaling?
If I put VGG(x) I have the same output dimension of (batch_size, 512, 32, 32)
If so, why do we need to scale it like this?

Thanks!

Best regards!