CrowdDet: Detection in Crowded Scenes: One Proposal, Multiple Predictions

October 2020

tl;dr: Multiple detections per anchor for crowd detection.

Overall impression

The paper proposed the idea of multiple instance prediction, and used EMD (earth mover distance) and set NMS to accommodate the multiple prediction per anchor.

It achieves nearly 5% AP gain in CrowdHuman dataset.

Current works are either too complex or less effective for handling highly overlapped cases, or degrading the performance of less-overlapped cases.

Key ideas

Technical details