Find the outline points of an object Given images below, how one could find all points that form an outilne. In second image there are 3 outlines. This is not an image processing thing, i need to do that mathematically, problem is i have no idea how the algorithm should work. https://ift.tt/eA8V8J

Given images below, how one could find all points that form an outilne. In second image there are 3 outlines. This is not an image processing thing, i need to do that mathematically, problem is i have no idea how the algorithm should work.

from GameDev.net http://bit.ly/2ItUYd3