Just google "Facial Action Coding System" and you will find a bunch of examples. Like this: https://imotions.com/blog/facial-action-coding-system/Or this: https://www.noldus.com/facereader/facial-action-units Official FACS manual is not free: https://www.paulekman.com/product/facs-manual/ You can also grab some nice…
If you're having an actor sit down and run through lines it would be well worth it to capture 3D data as well, that can go a long way in helping build out a robust FACS system based on accurate 3D depth data. It's much more reliable than just 2D tracking. There is a solution for just about every budget so it would be a…