Screenshot from my end of year college project, which tracks movement through a space (in this case, St Enoch Square in Glasgow). Uses Processing for detecting movement, as well as the BlobScanner library for detecting large shapes (e.g. people) and the Mesh library for calculating a Delaunay triangulation of the resulting points. Colours are sampled from the original image. To see the full video and code, check my blog at velvetkevorkian.wordpress.com.