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Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; ... List of facial expression databases; M. Microexpression; P.
A facial expression database is a collection of images or video clips with facial expressions of a range of emotions. Well-annotated ( emotion -tagged) media content of facial behavior is essential for training, testing, and validation of algorithms for the development of expression recognition systems .
Facial expression is the motion and positioning of the muscles beneath the skin of the face. These movements convey the emotional state of an individual to observers and are a form of nonverbal communication.
Eye contact and facial expressions provide important social and emotional information. People, perhaps without consciously doing so, search other's eyes and faces for positive or negative mood signs. In some contexts, the meeting of eyes arouses strong emotions. Eye contact provides some of the strongest emotions during a social conversation.
Risus sardonicus or rictus grin is a highly characteristic, abnormal, sustained spasm of the facial muscles that appears to produce grinning. It may be caused by tetanus, [1] [2] strychnine poisoning, or Wilson's disease, and has been reported after execution by hanging. [medical citation needed]
The emotions can be linked to facial expressions. In the 1990s, Ekman proposed an expanded list of basic emotions, including a range of positive and negative emotions that are not all encoded in facial muscles. [38]
In medical contexts, a facies is a distinctive facial expression or appearance associated with a specific medical condition. [1] The term comes from Latin for "face". [ 2 ] As a fifth declension noun, [ 3 ] facies can be both singular and plural.
Huntington's disease is a neurodegenerative disease that is characterized by a triad of motor, cognitive, and psychiatric signs and symptoms. [31] A large number of these groups that can be characteristic of a particular disease are known as a syndrome. Noonan syndrome for example, has a diagnostic set of unique facial and musculoskeletal ...