title: How to know if matchTemplate found an object or not?
body: <p>I used <a href="https://stackoverflow.com/a/8221251/1085722">this</a> answer and wrote my own program, but I have a specific problem.</p>
  <p>If the image does not have the object, <code>matchTemplate</code> does not throw an error, and I do not know of any method to check if <code>matchTemplate</code> found the object or not, can anyone give me advice, or give me a function name which checks this.</p>