Pre-serial killer considerations, I simply intended to study what causes people to perceive certain smiles as creepy. From observing trends in art, social media, ranking systems, and pop culture, I identified two main types of “creepy smiles”: Type I, which I coined The Grinch Pinch and Type 2, which I coined The Muted Shark. Types I and II typically contain all or many of the following features:
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 muscle (forehead muscle that elevates your eyebrows) does not always follow the prototypes presented in anatomy diagrams.
Frontalis shapes are widely variable, and this variability is a major contributor to age and expression-based wrinkle formations and brow shapes.
Currently learning chimpanzee FACS, chimpanzee anatomy, and making custom chimpanzee landmark diagrams. (Chimpanzee landmarks determined by Animal FACS group. Original research work by Lisa A Parr, Bridget M Waller, and Jennifer Fugate. See: Emotional communication in primates: implications for neurobiology )