The 5T's front camera uses
a 2D image of your face, not a 3D map as employed by the iPhone X and its True Depth system.
Not exact matches
Algorithms such as one developed by Marios Savvides's lab at Carnegie Mellon can analyse features
of a front and side view set
of mugshots, create a 3D model
of the
face, rotate it as much as 70 degrees to match the angle
of the
face in the photo, and then match the new
2D image with a fairly high degree
of accuracy.
The system takes a number
of 2D images of someone's
face and then stitches them together into a 3D model in which the lighting can be manipulated and the
face can be viewed from different angles.
The files include a variety
of pro-quality loading screens and some odd bits
of texture work, including a hideous
image of Luke Skywalker's
face stretched out on a
2D plane.
Aside from taking standard
2D still
images, this array projects more than 30,000 dots to help create a depth map
of the user's
face, which can be combined with the still
image to create a 3D version.
I also decided to test my
2D to 3D model on an earlier
image I had created
of my composite
face based on every Facebook photo I've been tagged in.
Additionally, AR Emoji creates a
2D image of you, then uses the front
facing sensors and camera to mimic 100 different facial expressions.
In the same vein,
Face ID has been tricked by an intricate $ 150 mask that's made
of a 3D - printed frame, a silicone nose, and
2D images for parts such as the eyes.