Surveillance in Multi-Camera Systems
Annie Luong, Christina Schmidt · 2013
Combining several cameras in a multi-camera system creates a greater overview of an area than what can be achieved with a single camera. If one of the cameras have pan, tilt and zoom capability (i.e. a PTZ camera), it can be used to focus on and track an object moving in the monitored area. In this project, a method for mapping image coordinates between four fixed overview cameras and a PTZ camera is developed and tested. It uses SIFT features to match images against each other in order to find transformations between the cameras. An extension for the cameras' built-in tracking for handling object transitions between the cameras is also developed. Moving objects are tracked in the overview cameras and the mappings are used to direct the PTZ camera to an object of interest. The coordinate mapping is found to be accurate in most cases. The method used for tracking has potential to be useful and some possible improvements are suggested.