Scanning issue. Help!
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- Raybandana
Hi there,
I'm trying to scan image out of a book - but I'm finding the scans aren't the greatest quality. You can really see the dot matrix - Would a drum scanner be better? How do I achieve a high quality scan?
Thanks!
- spendogg0
Dot matrix? Are you talking about the halftones? because if you are it wont get any better, that's how shit gets printed - overlaying halftones = rosettes. You can do a blur pass and unsharp mask to try and get rid of them.
- Raybandana0
Yea I mean half tones - So there is no way around it?
Not even drum scanning?- I dont think you can drum scan paper. Needs to be a transparency.spendogg
- okay thanksRaybandana
- jtb260
Yeah you can't really get around this. Though hears a technique I've used to mitigate the situation.
1: Scan at highest resolution available. (Hopefully this is much higher than you should need.
2: Apply Gausian Blur. No more than 1.8 Pixels if you can manage. The idea is to reduce the moire pattern as much as possible, with out destroying the details.
3: Res-Down to your intended size.
- spendogg0
this is sorta how i have always done it.
http://www.jasondmoore.com/2010/…
- monospaced0
Are you complaining because it's scanning TOO accurately?
- vaxorcist0
rotate slightly off angle in the scanner, then re-rotate back in photoshop... also there was a plug-in to remove Moire, but I forgot what it's called....
- Raybandana0
ahh i see thanks for the advice....
- nb0
Some scanners also have a "descreening" option that could help.