Parameter-efficient small object detection via P2 head co-design for UAV remote sensing images
A stride-4 P2 detection head with shared Distribution Focal Loss and channel scaling is co-designed, reducing parameters by 7.4% while improving mAP50 by 2.95% and AP_S by 3.19 pp on VisDrone-DET2019, indicating that resolution and parameter efficiency in UAV detection are not inherently at odds.