I saw a picture on the web and I was curious how to do it. The effect is a nice high contrasted black and white photo with very defined edges. It seems also that in some areas of the photo (high contrast) there was a tone/color inversion. Can you tell me what kind of plugin or script that can do the same trick in GIMP ?
-------- a couple days later --------
Thanks to Tibor95, Lylejk and mahvin for your help. I was able to play around with some photos I have. Below is an example of my initial work. I still need to get some practice to fine tune it.