Many PTZ cameras can be programmed with preset positions and can be made to survey these locations on a regular basis. The number of preset positions varies by camera manufacturer and model, but common presets average from 8 to 32 in number. The precision of a camera’s ability to return to a preset position varies based on the mechanics, electronics, and software used. In addition to preset positions, PTZ cameras can be made to operate only when a specific change occurs, such as a noise, motion, or a change in heat. This is done with devices such as motion detectors connected to the PTZ camera. In this way, recording times can be minimized to crucial events.
Furthermore, IP PTZ cameras come with a built-in IP address, enabling remote surveillance from anywhere in the world using a standard web browser. Users simply connect the camera to a network and they then can take advantage of many common software based features included with IP PTZ cameras, including a web server, an FTP server, and an e-mail client.
Another feature common to PTZ cameras is privacy masking. This provides the ability to mask certain areas in a camera’s view, such as a window or a door of a house. The position of the mask can interlock with the camera’s movements, so that if a camera pans, tilts, or zooms, the mask will reposition and resize accordingly to make sure what needs to be hidden stays hidden. This affords the user of the camera an escape from litigation due to infringement of privacy.
Before and after pictures of privacy masking taken with a Pelco Spectra IV PTZ camera