Agriculture
Microbes at the Gas Pump
Treating peanut allergy bit by bit
Middle school science adventures
Amphibians
Frogs and Toads
Tree Frogs
Toads
Animals
How to Fly Like a Bat
G-Tunes with a Message
A Whale's Amazing Tooth
Behavior
Internet Generation
Mind-reading Machine
Longer lives for wild elephants
Birds
Ibises
Falcons
Quails
Chemistry and Materials
Atom Hauler
Supergoo to the rescue
The memory of a material
Computers
Play for Science
Hubble trouble doubled
The solar system's biggest junkyard
Dinosaurs and Fossils
Dino Flesh from Fossil Bone
Dino Bite Leaves a Tooth
Dino-Dining Dinosaurs
E Learning Jamaica
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Earth
Coral Gardens
Earth from the inside out
Farms sprout in cities
Environment
Blooming Jellies
Whale Watch
Watching for Wildfires in Yellowstone
Finding the Past
Decoding a Beverage Jar
A Big Discovery about Little People
Fakes in the museum
Fish
Salmon
Trout
Piranha
Food and Nutrition
Sponges' secret weapon
Turning to Sweets, Fats to Calm the Brain
A Pepper Part that Burns Fat
GSAT English Rules
Who vs. Whom
Order of Adjectives
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
The Annual GSAT Scholarships
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT stars reap scholarship glory
GSAT Exam Preparation
GSAT Mathematics
Math and our number sense: PassGSAT.com
How to Slice a Cake Fairly
Secrets of an Ancient Computer
Human Body
Surviving Olympic Heat
Hey batter, wake up!
Gut Microbes and Weight
Invertebrates
Insects
Starfish
Lice
Mammals
Raccoons
Cape Buffalo
Quolls
Parents
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
How children learn
Physics
Speedy stars
Dreams of Floating in Space
The Pressure of Scuba Diving
Plants
Pumping Up Poison Ivy
Fastest Plant on Earth
Stalking Plants by Scent
Reptiles
Tortoises
Reptiles
Black Mamba
Space and Astronomy
Mercury's magnetic twisters
Planet Hunters Nab Three More
A Smashing Display
Technology and Engineering
Dancing with Robots
Machine Copy
Morphing a Wing to Save Fuel
The Parts of Speech
What is a Preposition?
What is a Verb?
What is a Noun
Transportation
Are Propellers Fin-ished?
Flying the Hyper Skies
Robots on the Road, Again
Weather
Recipe for a Hurricane
Earth's Poles in Peril
Polar Ice Feels the Heat
Add your Article

Look into My Eyes

If you look deep into a friend's eyes, you may imagine that you can see his or her thoughts and dreams. But more likely, you'll simply see an image of yourself—and whatever lies behind you. Our eyeballs are like small, round mirrors. Covered by a layer of salty fluid (tears), their surfaces reflect light just like the surface of a pond does. From a distance, we see shiny glints in the eyes of other people, says Shree Nayar, a computer scientist at Columbia University in New York City. "If you look up close," he says, "you're actually getting a reflection of the world." By analyzing the eye reflections of people in photos, Nayar and his colleague Ko Nishino have figured out how to re-create the world reflected in someone's eyes. Nayar's computer programs can even pinpoint what a person is looking at. Giving computers the power to trace our gaze could help them interact with us in more humanlike ways. Such a capability could help historians and detectives reconstruct scenes from the past. Filmmakers, video game creators, and advertisers are finding applications of Nayar's research as well. "This is a method that people hadn't thought of before," says Columbia computer scientist Steven Feiner. "It's very exciting." Eye tracking Eye-tracking technology already exists, Feiner says, but most systems are clunky or uncomfortable to use. Users often have to keep their heads still. Or they have to wear special contact lenses or headgear so that a computer can read the movement of the centers of their eyes, or pupils. Finally, under these circumstances, users know that their eyes are being followed. That may make them act unnaturally, which could confuse the scientists who study them. Nayar's system is far stealthier. It requires only a point-and-shoot or video camera that takes high-resolution pictures of people's faces. Computers can then analyze these images to determine in which direction the people are looking. To do this, a computer program identifies the line where the iris (the colored part of the eye) meets the white of the eye. If you look directly at a camera, your cornea (the transparent outer covering of the eyeball that covers the pupil and iris) appears perfectly round. But as you glance to the side, the angle of the curve changes. A formula calculates the direction of the eye's gaze based on the shape of this curve. Next, Nayar's program determines the direction from which light is coming as it hits the eye and bounces back to the camera. The calculation is based on laws of reflection and the fact that a normal, adult cornea is shaped like a flattened circle—a curve called an ellipse. The computer uses all this information to create an "environment map"—a circular, fishbowl-like image of everything surrounding the eye. "This is the big picture of what's around the person," Nayar says. "Now, comes the interesting part," he continues. "Because I know how this ellipsoidal mirror is tilted toward the camera, and because I know in which direction the eye is looking, I can use a computer program to find exactly what the person is looking at." The computer makes these calculations rapidly, and the results are highly accurate, Nayar says. His studies show that the program figures out where people are looking to within 5 or 10 degrees. (A full circle is 360 degrees.) I spy Nayar envisions using the technology to create systems that would make life easier for people who are paralyzed. Using only their eyes and a computer to track where they are looking, such people could type, communicate, or direct a wheelchair. Psychologists are also interested in better eye-tracking devices, Nayar says. One reason is that the movements of our eyes can reveal whether we're telling the truth and how we're feeling. Advertising experts would like to know which part of an image our eyes are most drawn to so that they could create more effective ads. Also, video games that sense where players are looking could be better than existing games. Historians have already examined reflections in the eyes of people in old photographs to learn more about the settings in which they were photographed. And filmmakers are using Nayar's programs to replace one actor's face with another's face in a realistic way. Using an environment map taken from one actor's eyes, the computer program can identify every source of light in the scene. The director then re-creates the same lighting on another actor's face before digitally replacing that face with the first one. Making computers that interact with you on your terms is another long-term goal, Feiner says. Your computer could let you know about an important e-mail, for example, in a variety of ways. If you're looking away, you might want the machine to beep. If you happened to be on the phone, a flashing light might be more appropriate. And if you're looking at the computer screen, a message could pop up. "The importance of this work is that it provides a way of letting a computer know more about what it is you are seeing," Feiner says. It's leading toward machines that interact with us in ways that are more like the ways in which people interact with each other.

Look into My Eyes
Look into My Eyes








Designed and Powered by HBJamaica.com™