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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 .
Voluntary facial expressions are often socially conditioned and follow a cortical route in the brain. Conversely, involuntary facial expressions are believed to be innate and follow a subcortical route in the brain. Facial recognition can be an emotional experience for the brain and the amygdala is highly involved in the recognition process.
Pages in category "Facial expressions" The following 36 pages are in this category, out of 36 total. This list may not reflect recent changes. ...
During infancy it is difficult to elicit discrete negative expressions like anger, distress and sadness, [9] and, perhaps unsurprisingly, the most common infant facial expression is the "cry-face". Cry-face is thought to integrate aspects of both anger and distress expressions and may indicate a shared basis in negative emotionality. [ 9 ]
The muscles of the face play a prominent role in the expression of emotion, [1] and vary among different individuals, giving rise to additional diversity in expression and facial features. [29] Variations of the risorius, triangularis and zygomaticus muscles. People are also relatively good at determining if a smile is real or fake.
Microexpressions can be difficult to recognize, but still images and video can make them easier to perceive. In order to learn how to recognize the way that various emotions register across parts of the face, Ekman and Friesen recommend the study of what they call "facial blueprint photographs", photographic studies of "the same person showing all the emotions" under consistent photographic ...
In 1978 Ekman and Friesen updated Facial Action Coding System (FACS), originally developed by a Swedish anatomist Carl-Herman Hjortsjö. [7] [8] FACS is a tool for classification of all facial expressions that humans can make. Each component of facial movement is called an action unit (AU) and all facial expressions can be broken down to action ...
For example, not everyone furrows their brow when they are feeling angry. Moreover, these emotional symbols are not universal due to cultural differences. For example, when Western individuals are asked to identify an emotional expression on a specific face, in an experimental task, they focus on the target's facial expression.