Eye-tracking

Summary

The video explains the process of eye tracking, which involves measuring eye movements and how the pupil reacts to stimuli. A camera records the pupil's movements while a subject views an image. The data is processed by software to calculate where the person is looking, using vectors to determine gaze direction. The final output shows areas of focus on the image through hotspots, providing insight into where attention is directed.

Takeaways

• 👁️ Eye tracking measures the movement and activity of the eyes.
• 🌑 The pupil is the opening in the center of the iris that allows light to enter the eye.
• 📸 A camera linked to a computer records the pupil's movements as the subject views an image.
• 🖥️ The computer calculates where the subject is looking based on pupil movement.
• 🎯 Even tiny movements of the pupil are registered and tracked by the eye tracking device.
• 📊 Data from the camera is analyzed by specialized software.
• 📐 The software uses vectors to project areas and calculate gaze direction.
• 🔍 The eye tracking device shows which zones the subject's eyes are focused on.
• 🔥 Hot spots on the image indicate where the subject's gaze is concentrated.
• 💡 Eye tracking technology helps understand how the eyes react to visual stimuli.

Q & A

What is eye tracking?

Eye tracking is the measurement of eye activity, specifically focusing on how the pupil reacts to various stimuli.

What is the function of the pupil in eye tracking?

The pupil is the hole in the middle of the iris that allows light to enter the eye, and its movements are recorded during eye tracking.

How does the eye tracking process work?

A camera records the subject's pupil movements while they look at an image. This data is then analyzed by a computer to calculate where the subject is looking.

What type of device is used to record eye movements?

A camera linked to a computer is used to record the subject's eye movements.

What does the eye tracking software analyze?

The software analyzes the data recorded by the camera, focusing on the tiny movements of the pupil to calculate the subject's gaze direction.

What method is used to calculate gaze direction?

The software uses vectors to project areas and calculate the subject's gaze direction.

What information does the eye tracking device provide at the end?

The eye tracking device shows which zones the eye was focused on by displaying hot spots on the image.

Why is it important to track even the tiniest movements of the pupil?

Tracking even the tiniest movements of the pupil provides precise data about where the subject's attention is focused.

How does eye tracking data enhance the understanding of visual stimuli?

Eye tracking data allows researchers to understand which areas of an image draw the subject's focus by showing hot spots where the subject's gaze is concentrated.

What role does the camera play in the eye tracking process?

The camera captures the movements of the pupil in real-time, allowing the computer to analyze and calculate gaze direction.