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As a brand new panoramic surveillance camera product, each vendor's definition and implementation technology is also different. At present, there is no unified industry standard. Generally speaking, the wireless monitoring visual range of the panoramic surveillance camera in the industry is relatively large compared to ordinary surveillance cameras. The 360 ​​degree panoramic monitoring (ceiling installation) or the 180 degree horizontal viewing angle (wall mounted) can satisfy all monitoring of a site. Can be called a panoramic surveillance camera, fisheye lens: This is the basic, because the performance of the lens is decided to be critical for the imaging effect. Secondly, high-resolution image sensors, the information processing capacity of the panoramic surveillance camera itself is very large, if the resolution of the sensor is not high enough, the user will see less clearly after the image is enlarged, and the former two belong to the basic hardware part.
Second, because the original fisheye lens has serious distortion distortion, the customer is unacceptable, so the image distortion correction becomes very important. In addition to correcting the software inside the surveillance camera, you can also use the back-end software to monitor or view the video in real time. In addition, there is a front-end chip that processes data information of a picture, but the recorded image cannot be flexibly rotated. After the built-in software in the front-end monitoring camera processes and corrects the image, it can not only relieve the network bandwidth pressure and disk storage pressure, but also does not allow the software of the back-end platform to process excessive data information.
Third, how to achieve the virtual rotation of the PTZ (e-PTZ), through the virtual PTZ can be free to move the image, rotate, zoom in and out, to meet the user's image monitoring of the details of the corners.
For current single-lens products introduced by various manufacturers, it can be divided from the technical point of view. The first aspect is that only the panoramic image and the quarter screen can only be output. The user cannot view the image according to the angle he wants to observe. The free rotation does not have practical value and does not fully reflect the function of the panoramic surveillance camera. 1: The image can be subjected to certain deformation correction and virtual PTZ, but the effect of distortion and correction is not good, in addition to the lower resolution (less than 3 million pixels), the sharpness effect after image processing is not good, and the traditional compression coding algorithm It also makes video processing consume too much of the PC server's resources. 2: For more than 3 megapixels, excellent algorithms and compression coding methods enable users to flexibly perform image distortion correction and virtual PTZ as needed.
The general panoramic surveillance camera as a new technology security equipment has many advantages that traditional surveillance cameras cannot compare, but it is not so 100% good. If you accidentally choose a poor panoramic surveillance camera, it will lead to monitoring. The effect, then, how can we judge the performance of a panoramic surveillance camera? Can refer to some of the following brief analysis: