You may also want to check the mailing list archives. Especially Joerg and I have discussed this a number of times. GhostScript paired with an image differ would be my favourite approach.
On 25.12.2003 16:12:44 Finn Bock wrote: > Another way of using the test suite could be to compare a binary image > of the pages against some kind of reference. Has such a approach been > tried? Does anyone know of available software that can render a PDF as > an image file? Jeremias Maerki