title: Sikuli does not recognize any image
body: <p>Sikuli does not regognize any image even if I set <code>Set Min Similarity</code> to <code>0.15</code>.</p>
  
  <p>Indeed, I try to do some actions on Notepad++.</p>
  
  <p>Notepad is opened with command <code>Open Application</code>. But all next steps crashed.</p>
  
  <p>The first error is the following one : <code>com.github.rainmanwy.robotframework.sikulilib.exceptions.TimeoutException: Timeout happened, could not find P(newfile.png) S: 0.15000000596046448</code>.</p>
  
  <p>Any idea? Thank you.</p>