All this raises questions about the

All this raises questions about the efforts of information-technology companies to develop artificial-intelligence algorithms which can recognise facial expressions and work out a person's underlying emotional state. Microsoft, for example,claims its"Emotion API" is able to detect what people are feeling by examining video footage of them. Another of the study's authors,however,expressed scepticism. Aleix Martinez, a computer engineer at Ohio State University, said that companies attempting to extract emotions from images of faces have failed to understand the importance of context.