In FACS, upper lid raiser, or AU5, is the action that raises and retracts the upper eyelid; this movement causes the eyes to appear wider and reveal more sclera (the white part of eye). The appearance changes we see in upper lid raiser are the result of an increase in contraction of levator palpebrae superioris, an extraocular muscle that works to keep the upper eyelid elevated.
Can we really measure smile authenticity? An exploration of the common assumptions we make about expressions of emotion.
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.
Signals of emotion are not limited to facial expressions. Changes in blood flow and skin color can also signal how we may be feeling. Here I explore the color changes from my authentic sadness reaction.
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.
The frontalis (forehead muscle that elevates your eyebrows) does not always follow the imagery presented in anatomy diagrams.
