This repo is an improvement version of https://github.com/biubug6/Pytorch_Retinaface

Improvements in is repo:

1. More Data Augmentation(Expand, MinIOU Crop with different ratio, Multi-Scale Training)
2. Long Training Schedule with more epoch and stage
3. Support More Backbone(MV1_0.25, MV2_0.35, MV2_1.0)

Comparison with origin implement(original image scale)

Style	BackBone	MAdds	Parameters	easy	medium	hard
Enhance_MV1	MV1_0.25	1.0B	0.44M	91.8%	90.2%	76.4%
Enhance_MV2	MV2_0.35	1.0B	0.48M	92.8%	90.9%	79.4%
RetinaFace_Ori[6]	MV1_0.25	1.0B	0.44M	89.6%	87.1%	69.1%
RetinaFace_biubug6[7]	MV1_0.25	1.0B	0.44M	90.7%	88.2%	73.8%

AP on hard set can surpass 80% by using knowledege distilling. Some deploy models are in the Deploy folder.

Reference

1. MobileNetV2: Inverted Residuals and Linear Bottlenecks
2. Ultra-Light-Fast-Generic-Face-Detector-1MB
3. libfacedetection
4. ASFD: Automatic and Scalable Face Detector
5. CenterFace
6. RetinaFace(insightface)
7. RetinaFace(biubug6)
8. RetinaFace(lbin)