What principle do pan-tilt-zoom (PTZ) cameras operate on?

• A. Fixed position surveillance
• B. Rotational scanning
• C. Controlled movement for flexible monitoring
• D. Automatic tracking without user input

Answer: (C)

Pan-tilt-zoom (PTZ) cameras are designed to provide dynamic surveillance capabilities by allowing operators to remotely control the camera's movement. This feature is vital for flexible monitoring in various environments, as it gives users the ability to pan (move side to side), tilt (move up and down), and zoom in or out on specified areas or details within the frame.

This flexibility enables PTZ cameras to cover larger areas and focus on particular subjects or events, making them especially useful in locations requiring comprehensive surveillance, such as parking lots, large public spaces, or warehouses. The controlled movement aspect signifies that an operator or preset automation can dictate the camera's position and focus based on specific needs, unlike fixed position surveillance, which cannot adapt to changing scenarios.