title: How to automate testing of Canvas game using Selenium and OpenCV?
body: <p>I want partly automate testing of Canvas based app. To track canvas in real time and click selected objects by coordinates. Coordinates for objects should be received by comparing pictures of objects and canvas. Google doesn't give any useful info about any similar issue. (Comparing of pictures like in Sikuli isn't very useful in my case).
  Can anybody help me where and how to start? Also, I want to do it using javascript.</p>