Disabling pdf-raster filtering

[Mark Brend <m a brend warwick ac uk>]

Hello,

I am using evince on Ubuntu, Jaunty & have found it performs some sort
of filtering/smoothing when displaying rasterred images embedded in
pdfs.  Is this intentional and is there some way to disable this
behaviour?

I have included some screenshots here for illustration:
http://docs.google.com/View?id=dc98k2bf_157gmfb4ncm

System info listed below

$ evince --version
GNOME Document Viewer 2.26.1

$ uname -a
Linux Kraken 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC
2009 x86_64 GNU/Linux

Many thanks for any advice/help

Mark Brend