Due to the limited field of vision of a single camera, two digital cameras are used to take photos of the fabric to be collected at the same time. The digital camera can record the image on the memory through the lens and the photosensitive device. The quality of its image depends on the quality of the lens and the pixel level of the photosensitive device, that is, the resolution. There are many kinds of lens, such as fixed focus, zoom, telephoto, wide focus, fish eye lens, etc., which can meet different shooting needs in different occasions. There are two kinds of photosensitive devices: CCD and CMOS. At present, they have applications. The difference between them is not big. What really determines the imaging quality is the pixel value. Cameras from hundreds of thousands to tens of millions of pixels are very common.<br>
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