The Problem of Human Attention Span
Cognitive Overload
Modern facilities and urban infrastructures often employ an overwhelming number of surveillance cameras. While these cameras provide a comprehensive view of an area, they also contribute to information overload for the security personnel monitoring them. The human brain is not designed to process such vast amounts of visual data continuously, leading to decreased attention and increased error rates over time.
Inefficiency Over Time
Research indicates that human attention starts to wane after about 20 minutes of continuous activity. For surveillance personnel who are required to monitor multiple camera feeds for extended periods, this can lead to critical oversights. Furthermore, after about 8 hours of continuous monitoring, the attentional resources are severely depleted, making it almost impossible to detect anomalous activities effectively.
Number of Cameras
Various studies suggest that a human operator can effectively monitor up to 9-12 camera feeds simultaneously. Beyond this, the detection rate for unusual activities begins to drop dramatically.