It's strange the things you never really see until your bogosity alarm goes off.
I only registered that we give an image credit for the featured picture on the main page because of the "author" name appearing next to today's image. Leaving aside the cognitive dissonance episode that made me notice this why are we doing it at all? I can understand that the caption must say that Ogata GekkÅ painted the image, firstly because we have an article on him and secondly it'd be stupid not to say so. But anyone else involved is mentioned on the image page. This is thought to be good enough for non-featured pictures contributed by editors. And even that is far more than authors and copyright holders of non-free images might get - usually just a link to the website the uploader restole ^Wdownloaded it from.
[[Wikipedia talk:Picture of the day/Guidelines]] and the associated templates could do with some rethinking.
Angus McLellan