Now computer can tell that you are smiling or sad.

A new technology is in progress by Cambridge university. They have developed a software which can recognize human gestures. It is a  computer of higher sensitivity.
It has the functionality which recognize face movements and also it uses human voice frequency to determine the mood of user

It has been tested and its correctness is around 75%

USE :-
If the computer finds the user is confused or not understanding anything, at that time computer can provide useful information to the user.

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