another idea from a BookBrainz discussion about photo books, ArtBrainz. could be similar to ImageBrainz above, but I could see this name more easily implying stuff like sculpture, frescoes, and other high art
(that’s not to say the name determines the scope, with many non-music recordings in MusicBrainz and stuff like newspapers, magazines, and research papers in BookBrainz)
I also think I prefer the abbreviation for ArtBrainz (AB) better than ImageBrainz (IB). granted, there might be a conflict with the now-defunct AcousticBrainz…