The ImageNet normalization is used as:
normalize = transforms.Normalize(mean=[0.485, 0.456, 0.406],
                                 std=[0.229, 0.224, 0.225])

While your mean is a bit different, the STD seems to be quite off and it also seems that you are indeed calculating the stddev of the mean of the samples, which would explain the small STD values and the large outputs.