title: google mobile vision - get face matrix
body: <p>I started using the google mobile vision API. </p>
  
  <p>I see from the <a href="https://github.com/googlesamples/android-vision/tree/master/visionSamples/FaceTracker" rel="nofollow">example given by google at:</a> 
  That it recognizes faces and gives their coordinates and landmarks, i.e eys, cheeks etc.</p>
  
  <p>I want to use the coordinates given above, and crop out the entire face, meaning the whole matrix in the rect. I can't find a way to get the frame in the google mobile vision API. </p>
  
  <p>Anyone got the answer?</p>