mean and std for every channel is 0.5 instead of (0.5071, 0.4867. 0.4408) as mean and (0.2657, 0.2565, 0.2761) as std about augmix

[hendrycks]

This so that converting between [-1,1] (image for a neural network) and [0,1] (image for viewing) is easy. For problems such as adversarial examples, one often needs to convert back and forth frequently. It also does not make much of a difference to performance if one uses (0.5, 0.,5 0.,5) vs (0.5071, 0.4867. 0.4408).

[shashankskagnihotri]

Thanks. :)