Security surveillance cameras, while the popularity of high-definition today. How to effectively use high-resolution image quality to achieve single-point wide-range monitoring has always been a concern of users.
Outdoors, often use high-definition smart dome cameras. Indoors, it is usually achieved by using a high-definition hemisphere with a wide-angle lens. However, as user requirements increase, 2.8mm or even 2.1mm ultra-wide-angle lenses are difficult to meet the panoramic monitoring in specific scenarios. The fisheye lens is an extreme ultra-wide-angle lens. Its horizontal viewing angle can approach or exceed 180 °. And it can monitor the surrounding scenes without dead angles in 360 °.
We know that the fish’s eyes are actually similar to the structure of human eyes. Object, but with a greater perspective. The idea of the fisheye lens comes from this feature. Its front lens has a short diameter and is parabolic toward the front of the lens, which is very similar to fish’s eyes.
And we have used wide-angle lenses before, we will find that the shorter the focal length of the lens. The stronger the distortion caused by the optical principle in the picture. The fisheye lens has the most distortion in order to achieve a large viewing angle of the panoramic range, except for the center of the picture. The scenes remain unchanged, and all other scenes that should be horizontal or vertical have changed accordingly. Therefore, although the fisheye lens has been designed and developed a long time ago. It has not been widely used in the security industry.
On the one hand, the early video surveillance systems were generally low in definition and there was no need for panoramic surveillance. On the other hand The picture obtained directly from the fisheye lens is distorted and cannot be effectively monitored. Only in the past year or two, with the popularization of high definition and the maturity of fisheye correction technology. Fisheye cameras for panoramic monitoring have been gradually developed.
Panoramic 3072 (H) * 2048 (V) image
Traditional high-definition network cameras always have monitoring blind spots. and it is necessary to supplement and coordinate multiple cameras to complete the monitoring of the panoramic range. One 360-degree panoramic fisheye lens network camera can realize the monitoring of the traditional four 720p cameras in the panoramic range. and the deployment cost is low.
6001 6 million panoramic fisheye lens camera = 4 720p traditional cameras
Combined with the independent 3D main fisheye correction algorithm, it can output high-definition, distortion-free images. Supports multi-screen display modes such as panorama, 13, 15, 17 and so on, and the details of local images are clear.
The full fisheye camera does not require any motor (mainly refers to the lens motor and the gimbal motor). any mechanical moving parts, the image is enlarged to each pixel through the virtual PTZ function. and you can roam to any position in the image. While enjoying the flexibility of PTZ control. it also avoids mechanical rotation and abrasion, effectively ensuring product stability.
360-degree panorama, automatic digital coordinate identification technology for partial pictures. accurately display the orientation information of partial pictures in the panoramic picture.
It is reported that this fisheye product can be widely used in judicial, financial, safe city, smart park, large shopping malls and supermarkets. airports, stations, rail transit, hotels and schools and other large places that require panoramic monitoring. It is widely sold in domestic and foreign markets. Because of its exquisite appearance and high cost performance, it is sought after by many customers.
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