Re: [Adonthell-devel] Handling edge pixels on scanned images.

[James Nash]

Unfortunately I don't know of a perfect solution for this, but you could
try this:

1. Make the alpaha (ie the nothingness) around the drawing to a selection.

2. Enlarge the selection by 1 or 2 pixels

3. Feather the slection by 1 pixel or so (if you want to smooth the
ediges a bit, otherwise omit this step)

4. Cut the selection.

Hopefully this will have removed a border of about 1 or 2 pixels all
along the edges of your pictures. With a bit of luck that will have
gotten rid of most of the white stuff!

Good luck! :)

            -James



> Hi,
> 
> I finally managed to interest 2 possible artists to make drawings.  They
> draw images on white paper, which is scanned afterwards.  We got around
> "purple noise" problem following instructions from "Adothell Graphics
> Manual"
>
http://mail.nongnu.org/archive/html/adonthell-artwork/2002-09/msg00014.html
> 
> But as images are drawn on white paper and scanned - all images suffer the
> same problem - edge pixels are usually some lightish color (mix of white
> paper background and for example brown hair foreground color) .  So all
> images have "whitish border" 1 pixel wide around them.  This border is
> clearly seen when placed on green background.
> 
> Is there a simple way to get rid of those pixels.  We use gimp to
> manipulate images.
> 
> Sasha.
> 
> 
> 
> 
> 
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