This code is authored by Julie R. Williamson and John Williamson. Julie.Williamson@glasgow.ac.uk, JohnH.Williamson@glasgow.ac.uk
If using this code or the associated materials, please cite this source. The original publication is available at: http://juliericowilliamson.com/blog/wp-content/uploads/2014/05/Williamson-small.pdf
Williamson, J.R. and Williamson, J. Analysing Pedestrian Traffic Around Public Displays. In the Proceedings of Pervasive Displays 2014. ACM, New York, USA.
Main Function for all video processing. Defaults for this file are adjusted here.