PSS: Object Detection Made Simpler by Eliminating Heuristic NMS

January 2021

tl;dr: Add positive sample selector (PSS) branch to FCOS to achieve end-to-end detection.

Overall impression

PSS keeps FCOS’s structure and training scheme as much as possible, and introduced one positive sample selector branch.

PSS uses a simple binary classification head to enable selection of one positive sample for each instance, while DeFCN uses 3D max filtering to aggregate multi-scale features to suppress duplicated detection.

Key ideas

Technical details