1. Camera configuration [internet]. Available from: https://www.raspberrypi.org/documentation/configuration/camera.md.
2. graph tools - efficient network analysis [internet]. Available from: https://graph-tool.skewed.de/.
3. Image segmentation with watershed algorithm [internet]. Available from: https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_imgproc/py_watershed/py_watershed.html.
4. Interactive foreground extraction using grabcut algorithm [internet]. Available from: https://docs.opencv.org/3.4.3/d8/d83/tutorial_py_grabcut.html.
5. Module minmax [internet]. Available from: http://www.chiark.greenend.org.uk/doc/python-pygraph/docs/pygraph.algorithms.minmax-module.html.