It's not moire, is it? What is he scanning?
Have him try a different scanning program - free trial of Vuescan. He can
perhaps narrow it down to a hardware vs. a software problem.
Maris
Brad Davis wrote:
> Hi,
>
> My electrician discovered that I know a little about scanning and
> presented
> me with this problem.
>
> He has an Epson 2400 scanner, hooked to a PC via USB2 - the PC is
> running XP
> personal. The Epson 2400 is his 3rd try at a scanner, the USB2 is the
> second try at an interface. In all attempts, he gets a light
> cyan-gray
> random pattern across all scans. This shows most clearly in white
> areas.
> It looks very much like what I would get using Photoshop and doing a
> random
> fill with noise at perhaps 10%. (I've never done anything other than
> a 50%
> noise fill, so that number is a very rough estimate.) The gray
> pattern,
> while random, is much too regular to be from interference, and it
> appears in
> the image, on the monitor - it isn't being added by the printer. He
> is
> using the Epson supplied software to do his scans and has had
> numerous
> folks look at his set up with no one being able to figure out what is
> causing the problem.
>
> That he has tried three different scanners seems to eliminate them as
> the
> cause. I wouldn't expect the interface to put in such an even (if
> random)
> dot pattern. I have no idea how XP might be at fault, but the one
> thing
> that would seem to be common is the XP driver for USB(1&2).
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