Putting more intelligence at the camera level means you get a more effective means of surveillance than is possible with a DVR or other centralized system. And the data is obtained in more manageable forms, with higher levels of accuracy.
Intelligent functions, such as people counting and face recognition are currently being integrated into network video products. Another example is that network cameras can be equipped with motion detection, which means that security guards no longer need to waste time or energy responding to false alarms. If there’s a break-in, cameras can send images directly to the security guard’s phone or PDA enabling him to assess whether or not his presence is required.