We seem to subscribe to the popular oversimplification that machines are less biased than humans; however, if you are familiar with the ways in which machines are trained to read and focus on different aspects of data, you will know: It’s just not that simple.
Anatomical variation is a surprisingly ignored consideration for face tracking/facial mocap in tech and entertainment. Simplified anatomy diagrams are often accepted as universally applicable to all faces and few further questions are asked.
The reality is: FACIAL MUSCLES ARE HIGHLY VARIABLE.
Masterclass excerpt and links from recent webinar with CAVE Academy, via Visual Effects Society.
The frontalis (forehead muscle that elevates your eyebrows) does not always follow the imagery presented in anatomy diagrams.
Inner brow raiser is one of the most difficult facial actions to find clean references for. Many sources fail to find actors who can separate their inner brow raiser from other facial actions such as outer brow raiser (from frontalis, pars lateralis) and brow lowerer (from corrugator).
Why do face trackers and avatars suffer from false positive brow lowering? Here we explore the root cause and offer a surprisingly simple fix.
