In recent years, with the widespread application of 3D face recognition technology in mobile phones, finance and other fields, people have a full understanding of 3D face recognition technology, and it has also accelerated its application in other fields. Among them, 3D face recognition has become one of the main recognition technologies for smart door locks.
At present, 3D face recognition in the market is mainly divided into: 3D structured light, ToF camera, binocular stereo vision according to the imaging principle of the camera.
ToF sensor ranging from single-point to multi-point, the application field has also been widely expanded, and the products are also rich and diverse. The following are typical application cases:
Face recognition smart door locks are usually equipped with ToF Sensor in order to meet the needs of long-term use. The application of ToF Sensor here is mainly reflected in two aspects, one is to do human body detection, and the other is to do pre-awakening of the face recognition system. In the face recognition door lock,
The logistics industry can identify the 3D data of a single product through the tof sensor. The tof sensor solution realizes 3D scanning measurement, and the recognition accuracy can reach the millimeter level. AI algorithm intelligently analyzes the type of shipment and measures in real time.
The tof sensor principle is used to measure the distance between the sensor and the object. The time it takes for a signal to return to the sensor after being reflected from an object is measured and used to calculate distance.
According to the speed formula: c=d/t, c is the speed of light, d is the distance, and t is the time. Then we measure the time the light takes between sending out and returning, and multiplying that by the speed of light is the distance.
While recording depth information, ToF sensor has outstanding advantages in response time, working range, etc., which also makes it widely used in warehousing logistics, robotics and other fields.
3D depth cameras are widely used, mainly in electronics, machine vision, people counting, industrial measurement and manufacturing industries. 3D depth cameras have been widely used in various aspects of quality inspection.
What are the uses of ToF cameras? One of the most important functions of tof camera applied to smartphones today is to take pictures. Using ToF technology, we can achieve very natural bokeh effects and fast autofocus (including in dark environments), which will give a qualitative improvement in picture quality. In addition, if the front camera is equipped with a ToF sensor, it can make the face unlock function required by applications such as mobile payment more secure and reliable.
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