Not necessary in practice

def imagenet_clamp_batch(batch, low, high):
    """ Not necessary in practice """
    F.clip(batch[:,0,:,:],low-123.680, high-123.680)
    F.clip(batch[:,1,:,:],low-116.779, high-116.779)
    F.clip(batch[:,2,:,:],low-103.939, high-103.939)