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Scanner/imaging gurus....helpy

T

tcsenter

Lifer
I was scanning a color veterinary product brochure and the scanned images came out like this:

Not very good (99Kb)

My scanner is a Microtek Slimscan C6 USB and I'm using JASC Paint Shop Pro 7.0 to acquire the image (Scanwizard 2.60 TWAIN driver) @ 200dpi resolution and millions of colors.

The pictures of interest in the brochure are reasonably high quality, but obviously well short of 'photograph' quality. Is there any way to reduce this pixelly 'moire' pattern? I tried PSP's Moire removal plug-in but it improved only ever so slightly. I also tried the de-interlace routine, but that didn't help at all.

Am I scanning at too high of a resolution? Not high enough? Or is this basically unavoidable because its in the source image?

Any tips would be appreciated.
 
Yep. What you are seeing is aliasing due to the scan resolution being a multiple of the print resolution.

Either overscan (300, 600 dpi) and then resize, or scan at odd resolutions (150, 175, 225, etc)
 
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