The dependencies specified in this project's requirements.txt are too strictly pinned, making it hard to install. For instance, [`opencv-contrib-python==4.2.0.34`](https://pypi.org/project/opencv-contrib-python/4.2.0.34/#files) doesn't have releases for Python 3.9 at all. It might be a good idea to change the requirements.txt specifiers to `~=` instead. Related SO issue: https://stackoverflow.com/a/72613708/51685