Recently, Zhang Junping, a professor at Fudan University, reminded everyone that you must wear clothes when performing face verification, especially do not do face recognition while taking a shower, otherwise your privacy will be revealed. How do you say this? Four words:Hu (hai) said (jiao) eight (shou) ways (ne).
In fact, during face authentication, the circular developing range displayed on the screen only helps you align your face with the camera. The actual picture taken is more than this "circle".
But don’t be afraid, even if the camera captures other parts, such as the neck, the face recognition mechanism does not care about those at all.
Today's face recognition algorithms can accurately pick out the "face area" from the entire picture for verification.
As for what is in the background, the algorithm will simply ignore it as air. No matter whether you are naked or not, people are not interested at all.
Of course, if the fake facial recognition is used maliciously, that would be a different matter.
in addition,During face authentication, you may see red, green and blue lights flashing in the background.
This is actually part of the living body detection technology, which uses the difference in reflection of light of different colors to verify whether the operator is a real person and avoid deception by photos, models, and videos.
The screen will project RGB sequence light to the human face according to specific timing, brightness, and color combinations, and then use the difference in reflections of light of different wavelengths on skin, eyes, and other parts to build a three-dimensional facial model.
At the same time, it can also play an auxiliary role, not only illuminating the face evenly in dark light and backlight, improving image quality, but also enhancing feature contrast and assisting in facial feature extraction by highlighting facial contours and details.
