We all know that Canon applies copious noise reduction to its DSLR
image, a "feature" which cannot be turned off.
Obviously a desktop computer with essentially unlimited time can weild
a lot more power than a tiny, in-camera digital processor with little
to no time to work on the image. But I wondered, how much better is
the "save the NR for the desktop" approach?
Take a look...
http://www.pbase.com/imageprocessing/resolution_chart
It is clear that Foveon is cleaner at ISO 1600 than Canon at ISO 100
after both have NR applied.