How to distinguish the night vision effect of the camera

As a surveillance camera, in addition to reliable quality and stable network service, the most important thing is the clarity of the monitoring picture. In particular, the introduction of high-definition cameras with more than 2 million pixels has greatly improved the effectiveness of monitoring. However, people often focus on the clarity of the day, but it is easy to ignore the infrared night vision effect.After all, the perpetrators prefer to act at night. So how to judge the night vision effect of the surveillance camera?
First: look at optical adaptability.
The practical application environment of the surveillance camera is relatively complex and diverse. If there is a strong light (flashlight, car high beam) in the picture, whether the infrared will be switched or not, once switched, it means that there is no infrared supplementary light at night, and the monitoring is half white and half black. I can't see the details.

The new C1C enhanced night vision Internet camera launched by the Fluorite Network uses two high-power infrared supplementary lights to optimize the optical structure design, and the effective night vision distance can reach 12 meters. At the same time, C1C also adds a new generation of ISP noise reduction technology to the design, the night video frame rate reaches 20FPS, the picture is smooth and without trailing, and the picture quality is transparent and delicate.

Second: look at the noise.
Similar to SLR cameras, surveillance cameras generally have little or no noise during the day, and the picture quality is very good, but when the light gets worse at night, the noise will increase, which not only affects the clarity, but also consumes network and storage space in vain, and increases the pressure on the processor, so many companies have developed noise reduction algorithms to erase the noise.But the disadvantage is that it removes the noise as well as the details of the picture.

Third: see if it is as clear as day and night.
When the light is dark to a certain extent, the camera will switch to the infrared supplementary light state.However, we find that many network high-definition cameras work well during the day. After switching to infrared, the definition of the picture decreases immediately, even by a large margin. The reason for this phenomenon is that the band of visible light is different from that of infrared light, resulting in inconsistent focus.In view of this situation, some manufacturers have developed day and night confocal technology.

Fourth: look at the shadow.
Those who have used the camera all know that when taking pictures at night, they can prolong the exposure and increase the brightness, but once the picture is moving, there will be obvious shadow, and the monitoring is more about shooting the dynamic process, rather than a still picture. Many manufacturers deliberately set the camera to grow up and expose the camera to the stationary object, so the picture effect is very good. But once used in real life, the effect will be greatly reduced. So we need to check whether there is a shadow on a moving object in night vision.