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Monday, 15 January 2018

This is what happens when you photograph the Face ID

A user of reddit has discovered something quite surprising (for him) and beautiful at the same time: the Infrared sensor of the notch of the iPhone X. As you know, the facial recognition of the iPhone X is possible thanks to a set of sensors integrated in the front of the device that send more than 30,000 points to map your face with precision ... although some users have managed to troll it even without resembling it .

Among other components , the notch has a transmitter and a receiver, and several sensors. Inside the transmitter there are 6 pieces including a filter, VCSEL, aligners and optical levelers. On the other hand, in the receiver there is an IR lens, a filter, CIS and CMOS image sensors. In addition, there is a proximity sensor and an ambient light sensor.

All of them work at the same time in the following way: The sent Light collects information about the depth, integrating the data of the 2D images taken by the front camera to obtain 3D images. The transmitter and receiver capture distance data, which are subsequently optimized by the proximity sensor. What an engineering work!

But all this, which makes possible the most robust biometric security system that exists, causes a curious effect when taking a photo. The user photographed his iPhone X with a Galaxy S7 Edge and saw that amazing trail of violet . Actually, it does not matter if one camera is another: the cameras are capable of capturing the flash of the IR lens. In fact, we would also see the same thing if we took a picture of the TV remote control in full operation.

As a curiosity, in addition to the IR of the iPhone X and the control, you can also see the infrared brightness of most security cameras by simply taking a picture. And with some cheap cameras, at a glance. And it is that if the infrared emitters are of bad quality, not all the Light emitted theoretically in IR does it in that frequency, but it reaches the visible spectrum.

Via | Reddit 

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