In the land of facial expressions, there are many, many facial actions that are easy to confuse and difficult to tell apart. Among the contenders for most-difficult-to-distinguish-facial-actions are two upper lip elevators known as upper lip raiser and nasolabial furrow deepener. (These terms are defined by the Facial Action Coding System – FACS.)
If you or your team are using open-source face tracking kits, figuring out what’s what can be challenging. Navigate the ambiguity with the FACS Translation Sheet!
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.
The smile is an essential expression for emotion and communication. Smiles form when our lip corners are pulled diagonally by a muscle called “zygomaticus major.”
An exploration of the nose wrinkler action and the evolution of changes caused by layered expressions.
