Question 27
Which of the following statements correctly describe the Region Proposal Network (RPN) in Faster R-CNN?
The RPN is fully convolutional and shares its convolutional feature maps with the downstream detection network.
The RPN relies on an external Selective Search module to generate its region proposals.
At each sliding-window location, the RPN predicts objectness scores and box refinements relative to k predefined anchor boxes.
Anchors of multiple scales and aspect ratios allow the RPN to propose regions for objects of very different sizes and shapes.