To install this as package you should be familiar with the process. But briefly these are the main steps using anaconda:
conda activate your_env
Install it with a pip command (pointing to the directory where you cloned it)
pip install /code/imutils/
or better: cd to the directory where you cloned the directory
cd ../code/imutils/
And then pip install the local directory
pip install .
This would be wrong:
pip install imutils
Because it will install another imutils package that someone has uploaded to pip.
This package has some image processing tools written by Ulises.