Python Video hints

https://stackoverflow.com/questions/4087919/how-can-i-improve-my-paw-detection

https://en.wikipedia.org/wiki/Mathematical_morphology 

http://docs.opencv.org/2.4/doc/tutorials/imgproc/erosion_dilatation/erosion_dilatation.html 

https://en.wikipedia.org/wiki/Erosion_(morphology) 

https://stackoverflow.com/questions/29718238/how-to-read-mp4-video-to-be-processed-by-scikit-image 

https://imageio.readthedocs.io/en/latest/examples.html