How to extract features map from Faster-RCNN pretrained model?

[Abbsalehi]

In the Faster R-CNN pre-trained model for extracting windows and doors, how to extract high-level feature maps from the intermediate layers or right before the Region Proposal Network (RPN) or from the backbone itself?

Faster R-CNN

[Abbsalehi]

@scw Dear Shaun, could you please assist me with this issue? thanks