Scanning tips?

Gary Ball gball at
Mon Mar 17 20:13:19 GMT 2008

You are essentially re-screening a screened object. I believe the  
technical term is " a poopy scan";-) . By scanning it "crooked", you  
will prevent a "moiré".  Avoid 45°, 90°, 30° or 60° angles.  
You'll have to experiment . The bigger you can scan it the better it  
will be when it is it's final size.

Good luck,

Gary Ball

On 17-Mar-08, at 3:43 PM, D. Michael McIntyre wrote:

> On Monday 17 March 2008, Cory K. wrote:
>> I scan around 300dpi and use "Despeckle" in GIMP but I still don't  
>> get
>> the result I would like.
> Rotate it to the right by some bizarre amount, like 7 degrees, then  
> rotate
> back to the left -7 degrees.  It does wonders for antialiasing  
> jaggy looking
> stuff.  Then if the result is too blurry, you can probably get back  
> to a good
> place with an unsharp mask or two.
> Another thing to try, if you scan at 600 dpi or so and then do a  
> high quality
> rescale down to the size it would have been at 300 dpi, you can  
> probably
> start out with a source image the same size that's in better  
> condition to
> start with.
> I no longer have a scanner to play with, so I can't really try out  
> these
> thoughts for soundness.  If you care to email me one of your  
> original images,
> I'd be happy to dick around with it, and then tell you what worked,  
> for next
> time.
> -- 
> D. Michael McIntyre
> -- 
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> Ubuntu-Studio-users at
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