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What is Facial Action Coding System (FACS)

Alternative Pain Management: Solutions for Avoiding Prescription Drug Overuse
Is a system to taxonomize human facial movements by their appearance on the face.
Published in Chapter:
Pain Assessment through Facial Expression
Sanjay Kumar Singh (Indian Institute of Technology (BHU), India), V. Rastogi (Institute of Medical Sciences (BHU), India), and S. K. Singh (Indian Institute of Technology (BHU), India)
DOI: 10.4018/978-1-7998-1680-5.ch002
Pain, assumed to be the fifth vital sign, is an important symptom that needs to be adequately assessed in heath care. The visual changes reflected on the face of a person in pain may be apparent for only a few seconds and occur instinctively. Tracking these changes is a difficult and time-consuming process in a clinical setting. This is why it is motivating researchers and experts from medical, psychology and computer fields to conduct inter-disciplinary research in capturing facial expressions. This chapter contains a comprehensive review of technologies in the study of facial expression along with its application in pain assessment. The facial expressions of pain in children's (0-2 years) and in non-communicative patients need to be recognized as they are of utmost importance for proper diagnosis. Well designed computerized methodologies would streamline the process of patient assessment, increasing its accessibility to physicians and improving quality of care.
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Addressing Emotions within E-Learning Systems
FACS is a system originally developed by Paul Ekman and Wallace Friesen in 1978 to taxonomize human facial expression. It is the most used method to measure and describe facial behaviors, coded through action units (AU).
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Image Processing and Machine Learning Techniques for Facial Expression Recognition
It is a system developed by Ekman and Friesen (1978) to categorize human expressions. Using FACS human coders can categorize all possible facial deformation into action units that describe facial muscle movement.
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Consumer Neuroscience: Evolution and Commercial Applications
Refers to a set of facial muscle movements that correspond to a displayed emotion.
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