This is fun! After reading this tutorial on making cartoons from photos I tried to emulate his technique in the GIMP. The dialogs are slightly different but here’s what I did..
- Layer->Duplicate Layer
- Select the new layer, Filters->Edge-Detect->Edge, select Sobel, Amount should be 2.0, and Black should be checked.
- Invert the edge-mask layer, it’s in Layers->Colors->Invert
- Back in the Layers Dialog, change the Layer Mode to Divide
Play around with Layer mode settings, desaturate the top layer, blur or otherwise mess up the bottom layer. Endless fun can be had! Feel free to post links to your own creations in the comments below!
Later.. on advice I got rid of the portrait, I’ll upload another tomorrow!