Recognizing human facial expressions with machine learning

Machine learning systems can be trained to recognize emotional expressions from images of human faces, with a high degree of accuracy in many cases. Image by Tsukiko Kiyomidzu However, implementation can be a complex and difficult task. The technology is at a relatively early stage. High quality datasets can be hard to find. And there are various pitfalls to avoid when designing new systems. This article provides an introduction to the field known as Facial Expression Recognition (FER).