Chapter 8 - Advanced Object Detection

1. Why is Faster R-CNN faster when compared to Fast R-CNN?
   We do not need to feed a lot of unnecessary proposals every time using the selectivesearch technique. Instead, Faster R-CNN automatically finds them using the region proposal network.
2. How are YOLO and SSD faster when compared to Faster R-CNN?
   We don't need to rely on a new proposal network. The network directly finds the proposals in a single go.
3. What makes YOLO and SSD single shot detector algorithms?
   Networks predict all the proposals and predictions in one shot
4. What is the difference between the objectness score and class score?
   Objectness identifies if an object exists or not. But class score predicts what is the class for an anchor box whose objectness is non zero