title: Representing bounding boxes with an angle using TensorFlow object detection
body: <p>The current version of <code>Tensorflow</code> object detection API supports the representation of bounding boxes without angle - represented by <code>xmin</code>, <code>ymin</code>, <code>xmax</code>, <code>ymax</code>.</p>
  
  <p>I am looking for ideas to represent (and predict) bounding boxes with an angle/orientation. </p>
  
  <p>Like this:</p>
  
  <p><a href="https://i.stack.imgur.com/XxqOL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XxqOL.png" alt="enter image description here"></a></p>