[sane-devel] Descreen feature

[René Rebe]

On Friday 27 July 2007 09:39:40 Bertrik Sikken wrote:
> Quentin Bierent wrote:
> > Hi there
> > 
> > I've been checking sane from time to time and a key feature is still 
> > missing at this time
> > every serious scanner user need descreen feature to get clean scan.
> > Goole shows it's been various requests about this feature (aka detramage)
> > 
> > Every other descreen "workaround methods" are quality degrading (blur, 
> > despeckle etc etc) only a specific and efficient descreen algorythm 
> > (with LPI and screens angles settings) can do a good job for 
> > profesionnal quality.
> > This is the only way to get a good resolution scan with a low print 
> > quality original (halftone pictures in newspaper can be acquired and 
> > smoothed WITHOUT sacrifying resolution and final quality)
> > 
> > This feature is available on every serious scanner software (agfa, 
> > binuscan...)
> > 
> > I will send some examples later.
> > 
> > I am aware this feature is tricky to implement but  it will for sure 
> > lift SANE  to new heights...
> 
> What you propose sounds much like an image processing step, while
> sane is (currently) more about simply getting the data from the
> scanner.
> Before adding image processing to sane itself, I think there should at
> least be some kind of framework where it can fit in cleanly.

This "commercial", "binary only" Windows junk software pieces
also only do blur and re-sharpen and the like.

You can use ImageMagick, ExactImage, Gimp, etc. to perform those
tasks.

Yours,

-- 
  René Rebe - ExactCODE GmbH - Europe, Germany, Berlin
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