Hi everyone! I've finally posted an update to the rpotter.py script that uses OpenCV 3.2. Check it out on GitHub. Many people have had trouble with running OpenCV on their Pi, so to make is as easy as possible, I've created an 16Gb SD card image with all of the Raspberry Potter requirements including the rpotter.py script.
You can download it here:
DMG for creating from Mac (5Gb ZIP)
Use the documentation from the Raspberry Pi Foundation for detailed instructions of how to create an SD card from this files. Have fun!