Tracking people on public cameras from a single instagram post.
Dries Depoorter built software to scan online public cameras and link them to geotagged instagram posts from the same location. Basically finding people from a single instagram photo and potentially tracking them across any public (or not) camera out there. Technically impressive, yet disturbing.
There was a video on the page too, but it seems to have been pulled due to a copyright claim from Earthcam who, I imagine, weren't very happy about their cameras being used for this.