[Gimp-user] Despeckling photos

[Gimp_Noob <forums gimpusers com>]

> Consider a black speckle that's a square 4 pixels wide and high (for
> an
> example).
>
> The selection goes to the edge of the speckle, all round.
>
> Growing the selection by 2 pixels will make the marching ants meet in
> the middle of the speckle - but there are no pixels of it left outside
> the selection, it'snow fully selected.
>
> Shrinking the selection won't create holes, so the tiny speckles are
> gone.
>
> Experiment using 1 pixel instead of 2, or grow by 2, shrink by 1,
> feather by 1 or 2, making sure you don't lose too much detail.
>
> In practice i scan in greyscale, not black and white, so it also
> depends on the "threshhold" paraneter in the select-by-colour tool as
> to how close the the speckles the selection goes, but i use Curves
> first to brighten the hilights somewhat and to darken the shadows. If
> you are working with a film rather than something printed in a book,
> that may not be appropriate - in that case, it helps to have the image
> in Precision 16 integer of 32 floating point (from the Image/Precision
> menu) so that you don't lose detail as you work.
>
> Hope this helps,
>
> slave
Thanks.

What should I do if I only have a .jpg file? In other words,there is nothing to
scan. If I remove too many speckles it looks fake.


-- 
Gimp_Noob (via www.gimpusers.com/forums)