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Popularization of 3D structured light
3D structured light based face learning intelligent recognition algorithm can quickly extract personal security identification features from input infrared feature information and depth information. The security feature has 10000+ dimensional information to ensure the accuracy of one millionth. The algorithm matches this security information with the security information at the time of entry to determine whether the security authentication is passed.
The basic principle of 3D structured light technology is that, through a near-infrared laser, light with certain structural features is projected onto the object to be photographed, and then collected by a special infrared camera. Such a light having a certain structure acquires different image phase information due to different depth regions of the object, and then converts the change of the structure into depth information through an arithmetic unit, thereby obtaining a three-dimensional structure. To put it simply, the three-dimensional structure of the object to be photographed is obtained optically, and the acquired information is further applied.
Advantages and disadvantages of 3D structured light :
Advantages: In general, it is suitable for high-precision in close-range scenes (0.3m-5m). Within 1m, the accuracy can be 1mm, which can be used for 3D face recognition. The distance error from 1m to 5m can also be controlled in the millimeter range. High resolution, low ambient light impact, low power consumption.
Disadvantages: The long-distance error increases quickly and the accuracy is poor.
An important application of 3D portrait reconstruction technology is 3D beauty. The accuracy of 2D beauty can achieve 296 collection points on the face. 3D technology can achieve feature points extraction of thousands or even tens of thousands of points. The 3D portrait is restored by the structured light depth camera, and then the finer microdermabrasion, whitening, big eyes, and thin face processing are performed based on the high-precision 3D face information, so that the portrait is more stereoscopic and natural. The 3D light effect technology allows the user to present the face features after 3D modeling in a variety of ambient light environments, presenting the real scene, and even providing photographic effects similar to movie blockbusters or studios. Level of photography.