Thursday January 23, 2020
Home Lead Story Computer Can ...

Computer Can Now Reveal Your Fake Facial Expressions

According to the researchers, in fake smiles it is often only the mouth muscles which move but, as humans, we often don’t spot the lack of movement around the eyes. The computer software can spot this much more reliably

0
//
Shanghai,
A U.S. Customs and Border Protection facial recognition device is ready to scan another passenger at a United Airlines gate (Representational image). VOA

Real and fake smiles can be tricky to distinguish, but researchers have now developed a computer software that can spot false facial expressions.

By analysing the movement of the smile across a person’s face, the software can determine whether or not the expression is genuine, said the study published in journal Advanced Engineering Informatics.

The most significant movements detected by the software were around the eyes, supporting popular theories that a spontaneous, genuine smile is one that can be seen in a person’s eyes.

“Techniques for analysing human facial expressions have advanced dramatically in recent years, but distinguishing between genuine and posed smiles remains a challenge because humans are not good at picking up the relevant cues,” said study lead author Hassan Ugail, Professor at University of Bradford in the UK.

The software works by first mapping a person’s face from within a video recording, and identifying the mouth, cheeks and eyes of the subject.

It then measures how these facial features move through the progress of the smile and calculates the differences in movement between the video clips showing real and fake smiles.

Shanghai,
Rana el Kaliouby, CEO of the Boston-based artificial intelligence firm Affectiva, demonstrates the company’s facial recognition technology, in Boston, April 23, 2018. (Representational image). VOA

Researchers tested the programme using two different datasets, one containing images of people expressing genuine smiles, and another in which the images portrayed posed smiles.

They found significant differences in the way the subjects’ mouths and cheeks moved when comparing the real and the fake expressions. The movements around the subjects’ eyes, however, showed the most striking variation, with genuine smiles generating at least 10 per cent more movement in these muscles.

“We use two main sets of muscles when we smile — the zygomaticus major, which is responsible for the curling upwards of the mouth, and the orbicularis oculi, which causes crinkling around our eyes,” Ugail said.

Also Read: Microsoft Acquires Data Privacy, Governance Service BlueTalon

According to the researchers, in fake smiles it is often only the mouth muscles which move but, as humans, we often don’t spot the lack of movement around the eyes. The computer software can spot this much more reliably.

“An objective way of analysing whether or not a smile is genuine could help us develop improved interactions between computers and humans — for example in biometric identification,” he added. (IANS)

Next Story

Tips to Take Better Care of Your Eyes if You Look at Screen All Day

Eye care tips if you look at screens all day

0
Eyes screen
If you spend a lot of time looking at a screen then follow these tips to take better care of your eyes. Pixabay

BY SIDDHI JAIN

Digital rules, and most people these days are glued to a screen for several hours a day, slowly eroding away their precious eyesight.

Whether at home, at the office, or even while travelling, it is almost hard to imagine life without mobile screens, computer screens and the television! For corporate professionals, both their professional and social life often involves staring intently at a screen.

For these reasons, a lot of computer users today are developing edigital eye strain’ or ecomputer vision syndrome’ and experience symptoms such as eye strain, headaches, dry eyes and blurred vision, says Dr. Mahmood Husein, MBBS; DOMS; FCPS; MS. HOD Ophthalmic Department, Saifee Hospital.

If you spend a lot of time looking at a screen and have started to experience any of these symptoms, the first thing to do is to reduce your screen time. The doctor, who is also associated with mfine, a virtual hospital on the cloud, shares useful tips to take better care of your eyes:

Eyes screen
Ideally, the computer screen should be between 20-40 inches away from your eyes. Pixabay

1. Place the computer screen at least 20 inches away from you

Ideally, the computer screen should be between 20-40 inches away from you. If it is too close or too distant, it may cause you to sit in an awkward position. Also, the top of your computer screen should be at or a little below eye level, to minimise any strain on the eyes.

2. Ensure that the screen is not too bright

When your screen is very bright, you are exposed to more eblue light’. This type of light can harm the eyes and affect your vision. Moreover, if you are sitting too close to a window or you can see reflected light in your computer screen, it can lead to eye strain and fatigue. Instead, ensure that the room is well lit. Reduce the brightness of your screen and add a glare filter if possible. Also, reduce the colour temperature of your display in order to reduce the amount of blue light emitted by the monitor.

3. Use a separate pair of computer glasses if necessary

Some people who do not need glasses for everyday use may benefit from using glasses specifically prescribed for computer use. Others who are nearsighted may find that their current prescription is not ideal for the computer; they could also benefit from special glasses meant for intermediate distances, rather than progressive or bifocal lenses.

Eyes screen
When you stare at a screen, you tend to blink less, which tires and dries the eyes. Pixabay

4. Take a break and look away from your screen

If your work requires you to look at a computer screen for a long time, make sure you take regular breaks. Follow the 20:20:20 rule to reduce eye strain: every 20 minutes, look at an object about 20 feet away for 20 seconds. If possible, walk away from your desk every hour or two, and look at a distant object through a window. This change in focus helps to exercise and thus relax the muscles of the eye.

Also Read- Get Ready for Your 9 to 5 Hours with This Hairstyle Guide

5. Keep your eyes refreshed

When you stare at a screen, you tend to blink less, which tires and dries the eyes. This, coupled with the air-conditioning of most corporate offices, may result in the eyes becoming very dry. To avoid this, take a break every couple of hours to splash some cold water on the eyes. Remember to blink more often to keep the eyes lubricated. Cooling drops can also help to refresh the eyes.

If you still experience trouble with your vision despite taking all these precautions, you are encouraged to visit an ophthalmologist at the earliest and get your eyesight checked. (IANS)