Facial Action Coding System (FACS) – A Visual Guidebook
Animition 참고자료/Facial, emotion 2019. 1. 11. 15:49출처: https://imotions.com/blog/facial-action-coding-system/
다시 정리 예정.
Main Action Units
Action Unit | Description | Facial Muscle | Example (Hover to Play) |
1 | Inner Brow Raiser | Frontalis, pars medialis | GIF |
2 | Outer Brow Raiser (unilateral, right side) | Frontalis, pars lateralis | GIF |
4 | Brow Lowerer | Depressor Glabellae, Depressor Supercilli, Currugator | GIF |
5 | Upper Lid Raiser | Levator palpebrae superioris | GIF |
6 | Cheek Raiser | Orbicularis oculi, pars orbitalis | GIF |
7 | Lid Tightener | Orbicularis oculi, pars palpebralis | GIF |
9 (also shows slight AU4 and AU10) | Nose Wrinkler | Levator labii superioris alaquae nasi | GIF |
10 (also shows slight AU25) | Upper Lip Raiser | Levator Labii Superioris, Caput infraorbitalis | GIF |
11 | Nasolabial Deepener | Zygomatic Minor | |
12 | Lip Corner Puller | Zygomatic Major | GIF |
13 | Cheek Puffer | Levator anguli oris (Caninus) | GIF |
14 | Dimpler | Buccinator | |
15 | Lip Corner Depressor | Depressor anguli oris (Triangularis) | GIF |
16 (with AU25) | Lower Lip Depressor | Depressor labii inferioris | |
17 | Chin Raiser | Mentalis | GIF |
18 (with slight AU22 and AU25) | Lip Puckerer | Incisivii labii superioris and Incisivii labii inferioris | GIF |
20 | Lip stretcher | Risorius | GIF |
22 (with AU25) | Lip Funneler | Orbicularis oris | GIF |
23 | Lip Tightener | Orbicularis oris | |
24 | Lip Pressor | Orbicularis oris | GIF |
25 | Lips part | Depressor Labii, Relaxation of Mentalis (AU17), Orbicularis Oris | |
26 (with AU25) | Jaw Drop | Masetter; Temporal and Internal Pterygoid relaxed | GIF |
27 | Mouth Stretch | Pterygoids, Digastric | GIF |
28 (with AU26) | Lip Suck | Orbicularis oris | GIF |
41 | Lid droop | Relaxation of Levator Palpebrae Superioris | |
42 | Slit | Orbicularis oculi | GIF |
43 | Eyes Closed | Relaxation of Levator Palpebrae Superioris | GIF |
44 | Squint | Orbicularis oculi, pars palpebralis | |
45 | Blink | Relaxation of Levator Palpebrae and Contraction of Orbicularis Oculi, Pars Palpebralis. | GIF |
46 | Wink | Levator palpebrae superioris; Orbicularis oculi, pars palpebralis | GIF |
Head Movement Action Units
Action Unit | Description | Example (Hover to Play) |
51 | Head Turn Left | GIF |
52 | Head Turn Right | GIF |
53 | Head Up | GIF |
54 | Head Down | GIF |
55 | Head Tilt Left | GIF |
56 | Head Tilt Right | GIF |
57 | Head Forward | GIF |
58 | Head Back | GIF |
Eye Movement Action Units
Action Unit | Description | Example (Hover to Play) |
51 | Eyes Turn Left | GIF |
51 | Eyes Turn Right | GIF |
51 | Eyes Up | GIF |
51 | Eyes Down | GIF |
Emotions and Action Units
The Action Units described above show the different movements of facial muscles. Certain combined movements of these facial muscles pertain to a displayed emotion. Emotion recognition is completed in iMotions using Affectiva or Emotient, which uses the collection of certain action units to provide information about which emotion is being displayed. For example, happiness is calculated from the combination of action unit 6 (cheek raiser) and 12 (lip corner puller). A complete list of these combinations and the emotion that they relate to is shown below. The gifs on the right are shown in the same order that the action units listed.
Emotion | Action Units | Description | Examples (Hover to Play) |
Happiness / Joy | 6 + 12 | Cheek Raiser, Lip Corner Puller | GIF |
Sadness | 1 + 4 + 15 | Inner Brow Raiser, Brow Lowerer, Lip Corner Depressor | GIF GIF GIF |
Surprise | 1 + 2 + 5 + 26 | Inner Brow Raiser, Outer Brow Raiser, Upper Lid Raiser, Jaw Drop | GIF GIF GIF GIF |
Fear | 1 + 2 + 4 + 5 + 7 + 20 + 26 | Inner Brow Raiser, Outer Brow Raiser, Brow Lowerer, Upper Lid Raiser, Lid Tightener, Lip Stretcher, Jaw Drop | GIF GIF GIF GIF GIF GIF GIF |
Anger | 4 + 5 + 7 + 23 | Brow Lowerer, Upper Lid Raiser, Lid Tightener, Lip Tightener | GIF GIF GIF GIF |
Disgust | 9 + 15 + 16 | Nose Wrinkler, Lip Corner Depressor, Lower Lip Depressor | GIF GIF GIF |
Contempt | 12 + 14 (on one side of the face) | Lip Corner Puller, Dimpler | GIF GIF |
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