As a new surveillance camera, the panoramic network camera is widely sought after in the security market. Compared to traditional styling surveillance cameras, panoramic cameras may be an ideal choice for indoor video surveillance, especially when the surveillance area requires 360 degrees of dead angle monitoring.
If you use a traditional dome camera or integrated gun, you need to install a surveillance camera in every corner of the room. A panoramic camera can be used as a few panoramic cameras, which greatly saves installation and maintenance costs. This is why the price of panoramic camera products is so expensive.
A panoramic camera is not just as simple as using a fisheye lens. If you only use a fisheye lens, the traditional surveillance camera can be turned into a panoramic camera by changing the lens. This is not the case. The panoramic camera is only through the fisheye. The lens acquires a panoramic image, then processes the image through an advanced image processor and outputs an image suitable for viewing by the human eye. This process is called Dewarp. Hikvision's 12 million panoramic network camera DS-2CD63C2F-I(V)(S) and Dahua's 12 million panoramic camera DH-IPC-EBW81200 are panoramic cameras that use this single fisheye lens + Dewarp technology. The way to achieve panoramic images is relatively easy to implement and is used by most network surveillance cameras.
In addition, there is a panoramic camera that uses multi-lens + image stitching technology, which can be composed of original images of multiple lenses, and can also display 360° bowl-shaped panorama through PTZ projection. Users can quickly select any monitoring angle through the mouse. And you can control the rotation, enlargement and reduction of the monitor screen to achieve no dead angle monitoring.
Panorama is a new product in China, but foreign manufacturers such as Arecont Vision have already launched multi-lens panoramic cameras, which is the main product of this company, and Axis also launched a single-lens panoramic camera very early.
Where are the panoramic cameras suitable for installation? In addition to the room entrances, halls, reception rooms and other areas we often think of, panoramic cameras can also be installed on the ceiling of the corridor to monitor the corridors. In addition, the panoramic camera is also suitable for the installation of open areas, such as airport supermarkets, terminals, parking lots, etc.
The advantages of panoramic surveillance cameras are so many. Although only a few manufacturers have launched panoramic network cameras, we expect that in less than a year, panoramic surveillance cameras will be as popular as ordinary surveillance cameras. So what factors do you need to consider when choosing a panoramic surveillance camera?
Resolution
Resolution is an important consideration for all surveillance cameras. It is important for a panoramic camera. Although the panoramic camera image can now reach 4K Ultra HD, it does not mean that the image quality is very high. Since the full image needs to be corrected, it is necessary to see the maximum resolution supported by the panoramic camera if the better details can be obtained after the correction. Now there are 1 million, 1.3 million, 2 megapixel panoramic cameras on the market. Although the price is not expensive, because the total pixels are too low, the image details cannot be obtained after image correction. We do not recommend customers to use them. Users should choose more than 4 million pixels. Panoramic camera.
2. Fisheye lens
This seems to have nothing to do with the user. If the panoramic camera is a single lens, then the lens is generally 180 degrees fisheye, or 360 degree lens, focal length 1.4-1.8mm, the lens plays a very important role in camera imaging. When choosing a lens, you should choose a million HD lens that matches the image sensor. Unlike normal lens imaging, the image quality of the edge of the image is reduced when the fisheye lens is imaged. The multi-lens panoramic surveillance camera uses an ordinary 2.8 mm or 3.6 mm lens imaging to ensure image quality in each area of ​​the image.
3. Wide dynamic / 3D noise reduction and other auxiliary imaging technology
Because panoramic surveillance cameras are often mounted on the ceiling of an indoor hall, the camera must be able to take high-quality images in varying light conditions such as backlighting or strong light. When selecting a panoramic camera, the user considers whether the camera has a bandwidth dynamic function and a 3D digital noise reduction function, so that even in high contrast and relatively dark lighting conditions, the surveillance camera can still capture high quality, no noise, clear images.
As for the installation, in order to obtain monitoring performance and shooting angle, the panoramic camera should be installed on a ceiling with a height of at least 3 meters and no obstacles to block the line of sight. Usually, the panoramic surveillance camera is designed for global monitoring. Don't think about replacing the PTZ camera with a panoramic surveillance camera.
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