title: IBM PowerAI Vision | What are the technical description of CLS and BBox losses ?
body: <p>I have been training an Object detection model on IBM PowerAI Vision. When i train the model i see the following marked losses. i want to know in deep learning terms what are these losses. Since there are many kinds of losses used for object detection. My initial research pointed me towards </p>
  
  <ul>
  <li>Cross entropy = CLS loss </li>
  <li>IoU loss = BBox loss</li>
  </ul>
  
  <p>But i am not sure, documentation doesn't say much about it.
  <a href="https://i.stack.imgur.com/ztSae.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ztSae.png" alt="enter image description here"></a></p>