Picture cataloguers commonly use verso for the back and recto for the front of a picture.
I’ve always thought that just plain wrong: if we must appropriate terms, wouldn’t it be fitter to filch from the numismatists, not the bibliographers – so, obverse for the front of a picture and reverse for the back?
Come to think of it, what’s wrong with front and back?
Pedantically,
Rupert Maas