Unrivalled wide dynamic and high frame rate

HD and high frame rate are all evaluation items of this IP* type camera. We noticed a specific phenomenon that appeared during the actual measurement process. That is, the specific adjustment part of the camera to the camera under the actual environment conditions of the manufacturer. In the evaluation of the wide dynamic state of the simulation, the foreground of the target is different from the background light, in addition to the static and dynamic differences, which together pose a big challenge for the type of camera because, as mentioned earlier, the IP* type The CMOS sensor of the camera is about high frame rate, which can make the picture more delicate and the picture of the moving target more clear. However, the reality is that the compression and coding chips used by the IP* cameras are not all supported by the performance of the CPU. Support for high frame rate and true wide dynamics, which means that the two are difficult to have both, this is because the IP* camera must be able to work from the Sensor sensor to the compression chip's ISP and CPU performance can match each other Otherwise, you can only compromise on both.

Low-light imaging, real or lie of IP* camera

From the specifications of the IP* cameras participating in this test, we all know that the minimum color illumination reaches 0.05 Lux-0.002 Lux under the aperture condition of F1.2-F1.4. This is also our observation of the performance of IP* cameras. The focus is on. The focus of this IP-type camera is low-light, that is, low-light imaging detection in color mode (Day Mode), is not faster than the start of ICR-Cut action and day and night mode conversion, not IR IR The illumination of the lowest 0Lux that the screen can withstand after the auxiliary lighting starts, because none of the above conditions can be called low illumination.

From the IP* video camera, the word “Super High Sensitivity” is stigmatized in the specifications of Image Sensor. Regardless of whether it is for Visible visible light or NIR near-infrared light conditions, it is surprising to us that we are observing the black box. Multi-segment illumination of 20Lux-7Lux-5Lux-3Lux-2Lux-1Lux-0.5Lux-0.1Lux-0.05Lux-0.01Lux was used for actual measurement, and all IP cameras participating in the test were set to DNR Max on and The maximum gain and contrast, brightness, and shutter are placed under initial and automatic conditions. As a result, most of the participating cameras are already filled with noise under 0.5 Lux's dark box illumination, and the color deviation and blurring of the screen are common. As a result, we have doubts about the effect of the actual low-light of the IP* camera. Of course, this may be due in part to the fact that some cameras don't have an IR aspheric lens in low light, so it's hard to avoid blurring but actually It is because of the fact that in the dark box with the lens aperture of F1.2-1.4, which can correspond to 0.5 Lux and even lower 0.01 Lux, it is also a minority. It was matched with the new Exmor Sensor, and the rest of the shutter or frame accumulation functions seemed to be lost in this equivalent laboratory-level black box test.

Furthermore, when the IP* camera was placed in a large dark box for testing the optical absorption, the result was unexpected. Some of the cameras were still poorly displayed in the dark box. When the night vision in the test room was simulated, the illuminance was 0.5. Lux was actually dark. The reason was that the scene of the scene was more complex. Some of the engineering constructions made the screen clear and contrastless, and the adjustment of the sharpness caused too many adjustments. When the screen is overexposed, when the contrast is too low, the screen is too dark, and the low-light effect cannot be completely presented. The poorly-photographed ** is revealed in front of everyone. This scene condition may be a bit harsh, and it is rare in reality. But please imagine a group of IP* cameras installed at the entrance of a shop. When there is no booth on the opposite side of the shop during the day and dusk, the screen is all clear and normal, but if the door suddenly enters the night, it will give you a fixed booth with lights. Business, does the scene meet the scene we simulated? And the low-lightness requirements for monitoring IP* cameras are not exactly the same.

Does the market decide the standardization of type* cameras?

After exploring the features of the above IP* camera, let us further discuss the compatibility and standardization of the IP* camera, because the standardization and compatibility of any type of IP camera need attention. . Therefore, we briefly explain our findings. Everyone knows that IP cameras must comply with the standards of ONVIF or PSIA. If not, there are protocol handshake mechanisms such as UPnp. These mechanisms are all designed to expand the market. Designed for versatility and popularity. However, in the IP* cameras that were tested this time, most of the brand's camera setting options have a compatibility standard option other than ONVIF with the national standard GB-28181 standard. This tells us from the market, in addition to global In the market, China's security market has become a large-area market for IP* cameras, and market rules also determine that IP* cameras need to respond to market demand with standardization.