Callum Barker

Hello! I noticed that the [libGL](https://dri.freedesktop.org/wiki/libGL/) system dependency is not strictly necessary as [OpenCV](https://pypi.org/project/opencv-python/)'s GUI functionalities (e.g. `cv2.imshow`) are not utilized. `opencv-python-headless` is a drop-in replacement for `opencv-python` which excludes...

Resolves #135 # Summary As explained in the issue, `rt-utils` appears to run headlessly, in which case libGL is not necessary if the `opencv-python-headless` package is used instead of `opencv-python`....