Device unlocking using an owner's face has become quite popular. Unfortunately, offering truly secure, flexible and effective facial scanning in your product can get difficult and expensive. MediaTek claims that its new take on this form of identification is neither, and is furthermore at least as good as Face ID.
https://www.notebookcheck.net/Mediatek-claims-that-its-new-Active-Stereo-will-beat-Apple-Face-ID.328980.0.html