Supported by 3D perceptual technology, we can process 3D information from the physical world to generate a 3D virtual world. Based on 3D information from 3D cameras, Tetras.AI provides 3D vision algorithms for 3D digital twins, enhances and fuses RGB and depth images, reconstructs 1:1 3D digital models, precisely verifies faces and bodies, and deploys other 3D vision technologies.