Agriculture
Growing Healthier Tomato Plants
Watering the Air
Middle school science adventures
Amphibians
Tree Frogs
Newts
Bullfrogs
Animals
Polly Shouldn't Get a Cracker
Red Apes in Danger
A Sense of Danger
Behavior
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Wired for Math
Mind-reading Machine
Birds
Owls
Kookaburras
Hummingbirds
Chemistry and Materials
The solar system's biggest junkyard
Supergoo to the rescue
The science of disappearing
Computers
Graphene's superstrength
Games with a Purpose
Look into My Eyes
Dinosaurs and Fossils
Battling Mastodons
A Rainforest Trapped in Amber
Ancient Critter Caught Shedding Its Skin
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Unnatural Disasters
Bugs with Gas
Rodent Rubbish as an Ice-Age Thermometer
Environment
Ready, unplug, drive
Island Extinctions
Nanosponges Soak Up Pollutants
Finding the Past
Ancient Art on the Rocks
Decoding a Beverage Jar
Big Woman of the Distant Past
Fish
Hammerhead Sharks
Saltwater Fish
Electric Ray
Food and Nutrition
Eat Out, Eat Smart
The Essence of Celery
Packing Fat
GSAT English Rules
Adjectives and Adverbs
Subject and Verb Agreement
Capitalization Rules
GSAT Exam Preparation Jamaica
GSAT stars reap scholarship glory
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
42,000 students will sit for the GSAT Exam in two weeks
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Scholarship
GSAT Exam Preparation
GSAT Mathematics
How a Venus Flytrap Snaps Shut
Losing with Heads or Tails
Math and our number sense: PassGSAT.com
Human Body
Don't Eat That Sandwich!
Smiles Turn Away Colds
Remembering Facts and Feelings
Invertebrates
Giant Squid
Flatworms
Leeches
Mammals
Giraffes
Bears
Chimpanzees
Parents
What Not to Say to Emerging Readers
Choosing a Preschool: What to Consider
The Surprising Meaning and Benefits of Nursery Rhymes
Physics
Gaining a Swift Lift
Einstein's Skateboard
Powering Ball Lightning
Plants
Assembling the Tree of Life
City Trees Beat Country Trees
When Fungi and Algae Marry
Reptiles
Asp
Geckos
Box Turtles
Space and Astronomy
A Family in Space
Zooming In on the Wild Sun
Unveiling Titan
Technology and Engineering
Shape Shifting
Crime Lab
Slip Sliming Away
The Parts of Speech
What is a Preposition?
What is a Noun
Countable and Uncountable Nouns
Transportation
Troubles with Hubble
How to Fly Like a Bat
Ready, unplug, drive
Weather
Science loses out when ice caps melt
Polar Ice Feels the Heat
Catching Some Rays
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™