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Analyze The Technical Advantages And Trends Of PTZ Cameras
Jun 08, 2018

The development of sensors and computer computing has influenced the development of new computer networks and processing frameworks. Among them, small and medium-sized video surveillance networks have been widely used.

In modern monitoring systems, one of the major challenges in the multi-camera tracking problem is how to maintain the continuity of the target identification under different FOVs. Although the static camera network can cover a wide area for monitoring tasks, the picture resolution will be reduced when the camera viewing area is increased to increase the viewing angle of the camera; when there is no overlapping FOV, the signal processing must still be in a single data source. On the implementation. Therefore, the introduction of PTZ cameras has brought new application advantages to the development of camera networks.

PTZ Dome is an all-in-one dome camera with features such as fast operation speed, optical zoom, precise positioning, and flexible control mode. With the progress of digitalization, networking, and high-definition development of the entire surveillance industry, PTZDome Cameras have also entered a new phase in product development. High-definition PTZ cameras have become a new hot spot in the surveillance industry. It mainly has the following four application advantages.

PTZ dome cameras can be divided into two types: high-speed dome camera and PTZ camera according to their different mechanical configurations. Both types are collectively referred to as PTZ dome cameras.

The high-speed ball adopts shaft drive and has a solid structure and can achieve 360-degree continuous rotation, but the cost is high. The PTZ camera adopts gear transmission. Because there is a limit, 360 degree rotation cannot be achieved, but the cost is low. Therefore, a 360-degree auto-reversal PTZ camera technology that can achieve 360-degree rotation and lower manufacturing cost is also applied to high-definition PTZ cameras.

This spherical camera, like the PTZ camera, uses gear transmission and is also limited in position. When 360 degree horizontal rotation control is performed on the camera, when the limit is reached, the camera will rotate horizontally in 180 degrees in 0.1 seconds, and rotate 180 degrees in vertical direction. After skipping the limit, the camera will continue to rotate in the direction controlled by the person. , thus achieving a 360-degree continuous rotation.

This structure of the camera is a very good choice when it is not required to continuously rotate the camera for a long time, and both the 360 degree monitoring is desired and the price of the fastball is low. Under normal circumstances, this type of dome camera with auto-reversal structure can achieve a horizontal rotation speed and a vertical selection speed of up to 300 degrees per second, and it can automatically adjust the rotation speed according to the zooming condition to ensure the precise limit of telephoto. speed.

The technological development of high-definition PTZ cameras has led to a further increase in the need for monitoring applications. In particular, based on networked camera control and operation, high-definition PTZ network cameras are required to respond quickly to control commands and to achieve camera rotation and zooming.

Under normal circumstances, there are two main control modes for HD PTZ cameras: rocker drag control and center point control. When using the joystick to PTZ camera control, it is difficult to achieve accurate positioning and difficult control. However, when using the "central point control" mode, it can be controlled freely.

In the “central point control” mode, the mouse is displayed as a “+” icon on the image. On the monitoring image, where the mouse clicks, the camera will use this point as the center, and it will be automatically rotated to precisely locate the point. When you want to zoom in on a target, you can press the left button while dragging the mouse to frame the target, and you can achieve automatic horizontal and vertical positioning and enlargement of the target.

The "central point control" method is only suitable for mouse control and is not suitable for joystick control.

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