ssd.pytorch

https://towardsdatascience.com/learning-note-single-shot-multibox-detector-with-pytorch-part-1-38185e84bd79

https://towardsdatascience.com/learning-note-single-shot-multibox-detector-with-pytorch-part-2-dd96bdf4f434

https://towardsdatascience.com/learning-note-single-shot-multibox-detector-with-pytorch-part-3-f0711caa65ad