Download from ImageNet Image URLs
$ pip install -r requirements.txt
$ wget http://image-net.org/imagenet_data/urls/imagenet_fall11_urls.tgz
$ wget http://image-net.org/archive/words.txt
$ python gen_urls.py
$ cat <generated urllist> | xargs -n 2 ./download.sh
$ nohup cat list/urllist.txt | xargs -n 2 ./download.sh > download.log 2> error.log &
$ python gen_list.py