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Practical teaching: How to measure the low light performance of webcam products 
Different manufacturers have different methods, and the digital indicators of the camera alone do not really reflect the actual performance. Generally, it can be evaluated from the four indicators of brightness, black level, signal to noise ratio, and resolution. The highest measurement value is defined as the minimum working illumination requirement. However, when measuring the four parameters of the camera, it is difficult to compensate for the overall performance of the camera by adjusting the gain level and image processing method. For example, increasing the gain level may increase the image brightness, but it will also increase the amount of noise in the picture, resulting in a Low signal-to-noise ratio. Therefore, the overall measurement results of the system can truly reflect the low illumination level of the camera, which imposes higher requirements on the test environment equipment and methods.
Professional test cards: grayscale cards, sharpened test cards, color reproduction test cards, noise test cards, and noise log log contrast cards.
Professional test equipment: star level low light tester, transmission light boxes, and diverse real scenes.
Low-light test environment: Starlight-class low-lightness tester, with a minimum illumination of 0.0001lux, can simulate the midnight from the sun setting to the dark suburbs, and meet the test requirements of starlight and microstar light.
Professional color temperature simulation system: multi-color temperature reflective light source system, can simulate 8 kinds of monochrome and more than 40,000 kinds of mixed color temperature. For the scenes often appearing in the video screen, such as high reflection, multi-color, and more details of the scene simulation, to ensure that the camera is used in various environments, video visual effects can be optimal.
Professional test system: Use the Imatest system for image quality analysis and the tensity meter to monitor illuminance data.
The monitoring equipment on the market today, whether it is a famous big brand or a small brand that is close to the people, can be described as a dazzling array of features. However, there are still a lot of products that are crudely crafted and are full of things. As a consumer with security awareness, how can we shuttle without being disturbed and effectively choose products that maximize our own interests?