Abstract
Human emotions like neutral, sad, happy, and others reveal the state of the mind of a person. This information is useful and thus finds its technical, interpersonal, and societal applications in various areas like surveillance, suicide prevention, marketing and strategy, entertainment, etc. The espousal of data science peaked the scientific interest in the detection of human emotions in the late 2000s and early 2010s. The recognition of human emotions is exigent, and it requires accurate inspection of physiological responses and/or facial expressions. Advances in the areas of bio-physiology and neuroscience have introduced numerous new tools for the detection of human emotions. However, many of these tools have certain shortcomings that make their usage limited. Therefore, researchers are continuously working towards new techniques and technologies to find better solutions than the existing ones for the detection of human emotions. This chapter deals with various tools and techniques that are being used for the recognition of human emotions.
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