There are four key points in the analysis of panoramic cameras from the technical side of the product.
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1. The quality of the lens will greatly affect the quality of the monitor image; the good lens can reach HD, megapixels or more, and the higher the frame rate (the speed of animation transmission per second), the more clearly the movement of the monitoring target can be seen. Process and detail actions.
2, a good performance panoramic camera, there must be a high-resolution image sensor. Due to the wide monitoring range of the panoramic camera, the information amount of the image sensor is inevitably very large, unlike the general camera only needs to process a part of the scene in the monitoring scene. Therefore, whether the resolution of the image sensor is high or low is also the key to affecting the unclear picture after the surveillance image is amplified.
3. The panoramic camera using the fisheye lens has different imaging principle than the ordinary camera. The edge of the image tends to form a convex and deformed image, so it is easier to make the image distorted or distorted than the ordinary camera, which affects the image quality. So how to correct and restore the image and see the monitoring objects in the image is the most important problem of the panoramic camera.
In theory, there are two ways to correct the image distortion of the fisheye lens. One is to process and restore the image by the back-end platform; the other is to directly correct the built-in software in the camera and then transmit it to the monitoring backend. . In general, it is recommended to use the latter to solve the problem of fisheye lens distortion, which can relieve the pressure of network transmission broadband and back-end storage, and improve the efficiency of monitoring operation.
4. Virtual PTZ can be used to zoom in and out the stored images. In the field of security monitoring, PTZ controls the pan-tilt up and down rotation and the lens to focus, for automatic or manual tracking of the locked target, and tracking the target in the monitoring range. The virtual PTZ used by the panoramic camera has the application concept similar to that of the pan/tilt. It does not have to perform the actual mechanized rotation like the real pan/tilt, but achieves similar effects by scaling the image, thus greatly increasing the monitoring system. The service life makes it easier for the monitor to operate and reduce maintenance costs.
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