Syncronization with 360° Panoramic View and PTZ Camera view
We developing a panoramic video monitoring method that could allow a scene to be monitored by two separate but view associated IP cameras simultaneously, in which one of them is with a panoramic view, whose view are stitched from several lens from different view angles or de-warped from fisheye lens to provide a global view; while the other is a PTZ camera, whose field of view can be changed by the PTZ movement commands.
Recently, CCTV camera manufacturers begin to offer multiple sensors panoramic cameras or fisheye lens camera, so that the views can be stitched together or de-warped to offer a panoramic view range from 180 degrees to 360 degrees. Although the panoramic cameras do provide a good global overview of the scenes under surveillance.
However, they do not provide sufficient details for regional view when incidents occur as panoramic camera comes with fixed lens with fixed pixels per inch setting.
In reality, when some event takes place, the operator need to watch the region of interests with higher resolution, and this is usually achieved by using a PTZ camera to 2 increase pixels per inch via optical zoom feature on the camera.
Global view from panoramic Camera
Regional view (red rectangle in Global view above) with insufficient pixels per inch setting.
The same regional view from PTZ camera.
The panoramic IP camera provide global view that enables the operator to have better situation awareness of the overall scene, while the PTZ IP camera facilitate the operator to provide detailed regional view when incident occurs.
But, when an incident is observed from the panoramic camera, the PTZ camera might have already been positioned to another regional view and thus it would take time for operator to issue PTZ commands through either physical CCTV keyboard with joystick to position the PTZ camera back to the designated region of interest.
Technical Issue
1. Panoramic camera and PTZ cameras would be used to monitor the scene in a tightly coupled fashion.
2. The view angles of these two cameras are tightly associated with each other.
The panoramic camera provides not only the global overview, but also serves as a regional view guider. On the other hand, the PTZ camera is a regional viewer, of which regional view will be directed by the regional view guider provided from the panoramic camera, which offers the 3 flexibility to view any region in the global view. Under this framework, the operator could directly command the PTZ camera to view any interested region within the global view by a simple Click & Drag operation to select the region of interest from the global view window. Likewise, when the user try to move the PTZ camera to another regional view by conventional CCTV keyboard, the corresponding rectangular window of the PTZ camera will also be refreshed on the global view window.
A
B
Global view from panoramic Camera
User Selected
Sub-region
Inverse Global View to Regional View Mapping
PTZ Camera Position Feedback
Global View to Regional View Mapping
Automatically Generated PTZ Commands to move to A
B
Manual PTZ Commands to move from A to B.
A
This approach offers the operator the most intuitive way to monitor both the overall scene and regional view, and yet the operator can switch to different regional view in very short time without going through time consuming manual PTZ control.
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Application Products
The camera is equipped with automatic day and night ICR and three efficient array infrared lights. It provides 15 meter range infrared uniformity illumination for 24-hours to support recoding of clean HD video image. The camera has a built- in microphone and speaker output, SDXC card slot and other rich functional.