speed up inference for face detector when using mtcnn #273
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test with TorchFaceAttrExtractor
before inference a image with 1632 x 1224 using time 1.2s
now just needs 0.29s without influence
Motivation
speed up face detector inference using mtcnn
Modification
image only change data type once instead of change data type with num boxes times.
Backward-Compatibility-Breaking (Optional)
No.
Use cases (Optional)
No.