First, download YOLO files here and extract.

Install python dependencies:

pip install -r requirements.txt

Clone Darknet repository:

git clone https://github.com/AlexeyAB/darknet.git

Generate libso to darknet python wrapper:

cd darknet/

4.1. Compile for GPU use:

make GPU=1 CUDNN=1 LIBSO=1 ARCH='-gencode arch=compute_86,code=[sm_86,compute_86]'

4.2. Compile for CPU use:

make LIBSO=1

Set your images folder path in in_path variable, and OUT_PATH to save in.

Run tool:

python crop_save.py