What is emotion recognition, and how can biometrics be used to perform it?

At a basic level, emotion recognition (ER) is the process of identifying human sentiment. While there have been many contributions to this discipline from a psychological and philosophical standpoint, the same cannot be said about technology. Attempting to identify human emotion using technology is a relatively new field and one that has been met with mixed results.

Within the realm of these applications, however, biometric approaches have shown promise, particularly face biometrics. The combination of different physiological and behavioral data …

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