An Efficient Anchor-Free Face Detector with Attention Mechanisms

Table 4

Positive samples matched per pixel map across different detection structures and average precisions under different configurations.

Pixel map stride	FPNH-Ori (K)	FPNH-Rematch	FPNH-Quad (K)
4	—	—	327.9
8	347.7	278.7	295.7
16	32.2	92.6	50.6
32	14.2	53.0	—
64	4.7	—	—
128	0	—	—
Total	398.8	424.3	674.2
AP (%)	63.4	64.0	70.5