title: Sikuli: Speed up recognition of absent image
body: <p>Finding a present image seems to work pretty fast, however, when the image is absent, sikuli takes a long time before it declared the image not found. Is it possible to speed up this process? I already minimized the image size and search region.
  I tried setting minTargetSize parameter, but it doesn't seem to have much effect.</p>
  
  <pre><code>Vision.setParameter("MinTargetSize", 6)
  </code></pre>