Agriculture
Silk’s superpowers
Flush-Free Fertilizer
Where Have All the Bees Gone?
Amphibians
Bullfrogs
Frogs and Toads
Poison Dart Frogs
Animals
Bee Disease
Return of the Lost Limbs
From Chimps to People
Behavior
Mosquito duets
Why Cats Nap and Whales Snooze
Lightening Your Mood
Birds
Blue Jays
Pelicans
Rheas
Chemistry and Materials
The memory of a material
Small but WISE
Salt secrets
Computers
Programming with Alice
Look into My Eyes
A Light Delay
Dinosaurs and Fossils
Fossil Forests
Dinosaurs Grow Up
Watery Fate for Nature's Gliders
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Detecting an Eerie Sea Glow
Hot Summers, Wild Fires
Snowflakes and Avalanches
Environment
Bald Eagles Forever
Plant Gas
Ready, unplug, drive
Finding the Past
Ancient Cave Behavior
Words of the Distant Past
Childhood's Long History
Fish
Pygmy Sharks
Sturgeons
Tilapia
Food and Nutrition
Moving Good Fats from Fish to Mice
The Essence of Celery
The mercury in that tuna
GSAT English Rules
Adjectives and Adverbs
Finding Subjects and Verbs
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
The Annual GSAT Scholarships
Mastering The GSAT Exam
GSAT Exam Preparation
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT stars reap scholarship glory
Results of GSAT are in schools this week
GSAT Mathematics
Setting a Prime Number Record
Prime Time for Cicadas
Detecting True Art
Human Body
Dreaming makes perfect
Taking the sting out of scorpion venom
Remembering Facts and Feelings
Invertebrates
Jellyfish
Scorpions
Worms
Mammals
Elk
Ponies
Great Danes
Parents
Children and Media
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
Physics
Road Bumps
Strange Universe: The Stuff of Darkness
Black Hole Journey
Plants
Getting the dirt on carbon
Farms sprout in cities
Cactus Goo for Clean Water
Reptiles
Reptiles
Iguanas
Anacondas
Space and Astronomy
Wrong-way planets do gymnastics
An Earthlike Planet
Saturn's Spongy Moon
Technology and Engineering
Squeezing Oil from Old Wells
Smart Windows
Roll-Up Computer Monitors to Go
The Parts of Speech
What is a Verb?
Problems with Prepositions
What is a Noun
Transportation
Flying the Hyper Skies
Tinkering With the Basic Bike
Ready, unplug, drive
Weather
Watering the Air
Weekend Weather Really Is Different
The Best Defense Is a Good Snow Fence
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™