> I would not be surprised if a face recognition NN worked better on Europeans rather than Chinese, for the prima facie reason that they have more variable facial features and other aspects like multiple hair colors other than black
This is false. Each individual has a preferred set of facial features that are used to distinguish faces, and this set is usually dependent on our race and/or where we grow up. People of some races look alike to us because they have lesser variability in this set, but may have more variability in a different set of facial features that our mind is not used to looking for.
A face recognition NN would be biased this way only if the training set was biased, or if it was only taught one set of features.
This is false. Each individual has a preferred set of facial features that are used to distinguish faces, and this set is usually dependent on our race and/or where we grow up. People of some races look alike to us because they have lesser variability in this set, but may have more variability in a different set of facial features that our mind is not used to looking for.
A face recognition NN would be biased this way only if the training set was biased, or if it was only taught one set of features.
There's a good explanation of this at http://lawcomic.net/guide/?p=3285