dataset: https://www.cis.upenn.edu/~jshi/ped_html/
$ (root)
$ python ./ObjectDetection/main.py
$ python ./ObjectDetection/inference.py --imagepath \
./data/walking_people.jpg \
--modelpath ./ObjectDetection/final_model.bin \
--savepath ./ObjectDetection/result.jpg
https://pytorch.org/tutorials/intermediate/torchvision_tutorial.html#