How to select a face recognition attendance machine

How to select visible light dynamic face recognition and infrared face recognition attendance machine?

1. How to distinguish: First of all, it is most obvious that from the fill light, the fill light of the infrared face recognition attendance machine is very weak. Even if we get close to the attendance machine, there will be no discomfort. Because he sends infrared light to take pictures, the fill light emits weak infrared light. The visible light dynamic face recognition attendance machine is similar to the camera we see on the road. It uses visible light to supplement the light for recognition, that is, when we punch in, there will be some dazzling white light shining on our face, which will cause corresponding discomfort to the human eyes.
2. The applicable scenarios of the two are different: if it is used indoors, and the number of people at a clock in point does not exceed 100, infrared is the best choice. If it is in the outdoor strong light environment, because of the large infrared interference in this scene, the infrared face recognition attendance machine will appear to be unable to recognize or difficult to recognize the scene, and the visible light dynamic face recognition attendance machine needs to be chose for this scene. In the indoor scene, if there are more than 100 people punching in, the visible light dynamic face recognition attendance opportunity will greatly improve the speed of punching in.
3. In terms of price: since the main chip with NPU is used for visible light, and the camera with 1 to 2 million resolution and a wide range is required, the cost will be higher than that of infrared light, and the natural market sales price will be higher.