Hacker News Reader

Adrian's site is fantastic resource for OpenCV with Python.

I am not a huge fan of OpenCv itself though.

OpenCV is riddled with gotchas(ie this algorithm does not run out of the box because someone has patented it/trying to patent it).

I suppose the fault is not exactly with the library itself.

what is your alternative to opencv?

There really isn't a good one.

For heuristics(non ML) based stuff you could try BoofCV which is written in Java, so for Python there is a wrapper https://pypi.org/project/PyBoof/