> > What I would like to do is take a photo of someone's face and turn it
> > into a cartoon, more precisely into figures that are on ordinary
> > playing cards: Jack, Queen and King. The main feature of these figures
> > are: clear sharp edges and uniform colors between edges. This last
> > thing is the one that I'm not able to create from the photo. I tried
> > all kinds of edge detecting algorithms but the end result was always
> > 'photo-like' in the sense that the colors were not uniform but all
> > kinds of pixels next to each other as is always the case with photos.
> >
> > Would it be possible to detect sharp edges with uniform colors between
> > them?
> I would suggest keeping the two operations -- outlining and color
> smoothing -- as separate operations.
> If you duplicate your layer and, on the top layer perform your edge
> detection, followed by a desaturation and color removal, you will be
> able to erase (or enhance, or de-emphasize) the outline as you desire.
> On the lower layer, try the Selective Gaussian Blur to smooth out the
> colored regions.
> Using the above technique (crudely), I was able to produce the
> following transformation:
> http://www.imageox.com/image/46549-bush.png

Thanks very much, the example you gave is exactly the kind of thing I
would like to do.

I guess I know too little about the terminology here; how do I
desaturate the image? And what do you mean by color removal? The top
layer should have transparent background, shouldn't it?

I guess what I'm asking is what did you exactly do when you got your
example done?

> I should add that the Greycstoration Plug-in will also work wonders in
> cartoonifying an image.
> http://www.greyc.ensicaen.fr/~dtschump/greycstoration/index.html

I'll take a look at this as well, thanks.

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