title: How to get list of pixel coordinates[x, y] of certain color(RGB) with python?
body: <p>I'm trying to make an indoor navigation and I need indoor map that robot can automatically navigate the way.
  I'm thinking of using image which have different colors for each place(certain section), and I want to know the way to get the coordinates of the certain colors. So that I can designate places to certain color area using that coordinate. How can I get the list of pixel coordinates of the image which have certain color using python? In this case, I know RGB code of color! I am currently using pycharm</p>