In the self-service terminal camera module project, in addition to learning to select the parameters such as the pixel and focal length of the USB camera, you also need to learn to select the function of the USB camera and complete the design of the self-service terminal camera module. Now let's talk about how to select the USB camera module as the functional requirements of the device.
In addition to the night vision that we often use in the project, the USB camera module also has USB cameras such as starlight, black light, full-color lights, etc.
The infrared USB camera module mainly uses the infrared lamp to actively project infrared light to the object in the dark environment without visible light or low light, and makes the infrared light enter the lens for imaging through the reflection of the object. The imaging method and technology are relatively mature. It is widely used in actual intelligent terminal equipment projects and has high cost performance. It has become a common application scheme for infrared USB cameras.
According to the infrared radiation distance, there are three different types in industry: single light source, dual light source and array light source. Generally, the night vision radiation distance of single light source is about 30 meters, and the night vision distance of dual light sources is about 50 meters. The video picture of infrared night vision is a black-and-white picture. The image is easily limited by the exposure distance of the infrared lamp. In some special scenes, the details may not be clear, such as faces, license plates, etc.
According to the functional classification of the USB camera, the star level USB camera projection module belongs to the low illumination camera projection module. Low illumination USB camera refers to a picture that can still display clear color images under low light intensity. Starlight is divided into starlight and super starlight. The ordinary illumination can also maintain the full-color picture under the illumination of 0.01LUX, and the weak light environment called starlight with the illumination of 0.001lux can also maintain the full-color picture, which is called super starlight.
