The Development Direction of 3D Vision Sensing Technology
3D vision technology is to collect the 3D coordinate information of each point in the field of view through the 3D camera, and obtain the 3D stereo imaging intelligently through the algorithm restoration. It will not be easily affected by the external environment and complex light. The technology is more stable and can solve the previous two The problem of poor maintenance experience and security.
At present, the 3D sensing technology solutions adopted by the industry are mainly: binocular ranging method, ToF time-of-flight method and 3D structured light. The binocular ranging method uses a 3D camera to capture images under natural light conditions, similar to the human eyes, and uses the principle of triangular ranging to calculate depth and distance information; the ToF time-of-flight method uses sensors to capture near-infrared light from the emitted The time of flight to the reception is used to calculate and judge the distance of the object; 3D structured light is to project the laser speckle image onto the surface of the object, and the camera receives and collects the information reflected by the surface of the object, and calculates the position and depth information according to the light signal change caused by the object , For example, Alipay uses a structured light solution for facial recognition payment, which is suitable for application scenarios with high security requirements such as the financial field.