[Gimp-user] About Pointillism / Pointillist Effect

[Nathan Lane]

I just tried out what Claus suggested on this picture of Dennis Ritchie
(attached).

1. Image > Mode > Grayscale
2. Colors > Brightness-Contrast (Brightness=127, Contrast=35)
3. Image > Mode > Indexed (Generate optimum pallette, Maximum number of
colors=2)
4. Opened up the Colormap tab on the Layers, Channels,... toolbox
(color0=000000, color1=ffffff)

and I ended up with the other attached image that almost looks like the
Linus Torvalds image you attached.

Nathan

On Wed, Jan 28, 2009 at 8:31 AM, Claus Cyrny <claus.cyrny at web.de> wrote:

> J Figueroa G wrote:
> > I have one question about a filter, plugin or script that can make a
> > similar effect like THIS IMAGE
> > <http://www.muylinux.com/wp-content/uploads/2009/01/linus-y-gnome-1.jpg>
> >
> > I can say that this is an Pointillist Effect, but the newspaper filter
> > effect can't make.
> >
> > I hope that you can give me one answer or guide steps.
>
> At a very first glance, I see that this is an
> indexed image with a color depth of just 1-bit.
> This effect can be achieved by dithering
> the image.
>
> One (quick) way to do it would be:
>
> 1.) Convert the image to greyscale.
> 2.) Optimize it (remove background etc.)
> 3. Increase the contrast as much as possible,
> without losing the details you would like to
> keep.
> 4.) Convert the image from greyscale to indexed
> with 2 colors (black and white). Set the options
> 'Use a black and white (1-bit) palette' and
> 'Dithering > Color Dithering > Floyd-Steinberg
> (reduced color bleeding)'.
>
> You may not get all the subtle details included in
> your example (this 'copperplate engraving' effect),
> but at least that's a start. Maybe there is some
> plug-in for the Gimp available.
>
> HTH,
>
> Claus
>
> --
> Claus Cyrny : Webdesign |  Grafik | Fotografie
> :: Web: http://home.arcor.de/ccyrny/ ::.
> :: Fotos: http://photo.net/photodb/slideshow?folder_id=714471 ::.
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>



-- 
Nathan Lane
Home, http://www.nathandelane.com
Blog, http://nathandelane.blogspot.com
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