In SQLite's case (and probably in the case of most reasonably popular image manipulation libraries), those binary blobs very likely already exist or can be read

In SQLite's case (and probably in the case of most reasonably popular image manipulation libraries), those binary blobs very likely already exist or can be readily recreated. ARM is not some newfangled obscure architecture; SQLite's been used to great success on far more exotic platforms than that (including, I'd imagine, on devices running iOS).