This is a download from BBC Learning English.
To find out more, visit our website.
Hello, this is Six Minute English, I'm Neil.
And I'm Sam.
It's good to see you again, Sam.
Really?
Yeah, it's of course.
Can't you tell, by the way, I'm smiling?
Ah, well, I find it difficult to tell if someone is really smiling or if it's a fake smile.
Well, that's a coincidence because this program is all about how computers may be able to tell real smiles from fake smiles better than humans can.
Before we get into that, though, a question.
The expressions that we can make with our face are controlled by muscles.
How many muscles do we have in our face?
Is it A, 26, B, 43, or C, 62?
What do you think, Sam?
No idea, but a lot, I'd guess, so I'm going with 62.
Okay, well, we'll see if you'll be smiling or crying later in the program.
Hassan Ugal is a professor of visual computing at the University of Bradford.
He's been working on getting computers to be able to recognize human emotions from the expressions on our face.
Here he is speaking on the BBC Inside Science Radio program.