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TOF
TOF is the abbreviation of Time of Flight technology, that is, the sensor emits modulated near-infrared light, which is reflected after encountering an object. The sensor calculates the time difference or phase difference between light emission and reflection to convert the distance of the photographed scene to produce Depth information, combined with traditional camera shooting, can present the three-dimensional outline of the object in a topographic map with different colors representing different distances.
ToF camera sensors can be used to measure distance and volume, as well as object scanning, indoor navigation, obstacle avoidance, gesture recognition, object tracking and response altimeter. Data from sensors can also help 3D imaging and improve the augmented reality (AR) experience. In mobile phones, ToF camera sensors may be used for 3D photography, AR, especially portrait mode.
The ToF camera can also help in low-light situations. Since the sensor uses infrared light to pick up the "distance subject", it can help the smartphone focus even in black.

Application of TOF camera
1. Face recognition, gesture recognition
2.3D imaging, AR experience, interactive entertainment
3. Machine vision, industry 4.0
4. Object scanning, size measurement, distance measurement, defect detection
5. Assisted driving, autonomous driving