Shenzhen Sowze Security Electronic Co.,Ltd
Add: 6th Floor, Bole industrial, Bantian Second Sub-district office, Longgang district, Shenzhen, China
The panoramic PTZ camera has both a panoramic function and a gaze function, and is a combination of a panoramic camera and a high-speed dome camera.
The panoramic camera has the advantage of "seeing wide" where the viewing angle of 360 degrees or 180 degrees can be observed, but the disadvantage is that due to non-optical zooming, the user cannot be presented with sufficiently clear details of the region of interest. On the contrary, the high-speed dome camera can be rotated freely to the region of interest, and the details of the region of interest can be clearly seen through optical zooming, but the disadvantage is that the angle of view is limited, resulting in easy “temption”.
The panoramic PTZ camera combines the advantages of organically combined panoramic cameras and high-speed dome cameras, and effectively overcomes their respective shortcomings, thus simultaneously possessing the advantages of the "wide-viewing" of the panoramic camera and the "seeing" advantage of the high-speed ball camera.
The working principle of the panoramic PTZ camera includes two core processes, calibration and linkage, as follows:
Before application, the correspondence between the panoramic camera space coordinate system and the high-speed ball camera polar coordinate system is first established. This process is often referred to as "point-to-face calibration."
In the application process, according to the established spatial correspondence between the panoramic camera and the high-speed ball camera, the pixel coordinates of the region of interest of the panoramic picture are converted into the pitch angle and the zoom ratio of the high-speed ball camera, and the high-speed ball camera is rotated and scaled to correspond to The number of pitch angles and variable magnification. This process is often referred to as "point-to-face linkage."
First, the user designates a focused area of interest on the client panoramic screen;
Then, the client sends the position information of the region of interest to the panoramic camera.
Then, the panoramic camera calculates the pitch angle and zoom value of the high-speed dome camera corresponding to the panoramic region of interest based on the spatial correspondence between the pixel coordinates of the panoramic picture and the pitch angle and zoom of the high-speed dome camera.
Finally, the panoramic camera sends a rotation and zoom command to the high-speed dome camera to control the speed dome camera to rotate to a specified area.