Searching for name of effect
I want to design posters and I have stumbled upon this effect often, but I don't know what it is called. Thus I haven't been able to look for tutorials.
I am not talking about the colors or the ripped paper but the way the image has been transformed into dots of either of the two colors.
I am using GIMP and Inkscape. So, if you know how to do it in those applications I would be happy to hear about it.
I am also open to other applications as long as they are free open source software (FOSS). Of course, I am also grateful for just knowing what the effect is called.