October 2018
Intermediate to advanced
246 pages
6h 26m
English
Content preview from Machine Learning Projects for Mobile Applications
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Face orientation tracking
Face tracking can be used to detect a particular face in a video. We can calculate the amount of frames that a particular face appears in, and we can also detect whether two faces are similar based on the position and motion of the face (this is typically possible in a video).
Face position is tracked using Euler angles, which identify the position of the face from the camera's angle:
- Euler X: A face with a positive Euler X angle is facing upward
- Euler Y: A face with a positive Euler Y angle is turned to the camera's right and to its left
- Euler Z: A face with a positive Euler Z angle is rotated counterclockwise relative to the camera
Among these three angles, ML Kit only supports the detection of the Euler Z angle; ...
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