Eye Tracking Headset Correlating Pupil Position to Gaze Location
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Solution Overview
Problem
Gaze position tracking systems require the user's head to be held steady, limiting their efficiency and range of use in real-world situations, particularly for applications like computer gaming and advertising effectiveness analysis.
Innovation Solution
An eye tracking headset system that includes a headset with cameras for pupil and scene tracking, coupled with a belt pack for processing, enables real-time gaze location determination and cursor control without the need for steady head positioning, using a novel calibration method to correlate pupil position with gaze location in a scene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gaze position tracking systems require the user's head to be held steady, then measurement precision of gaze location is improved, but ease of operation and adaptability to real-world situations deteriorate
Solution Approach 1:
The patent introduces a headset-mounted camera system as an intermediary to capture the user's field of view and correlate it with pupil position data. This mediator enables the system to track gaze location accurately without requiring head stability, as the headset moves with the user's head and provides a reference frame for calculating gaze position relative to the displayed content.
Solution Approach 2:
The system changes the reference frame parameters by transitioning from a static camera reference to a dynamic headset-mounted camera reference that moves with the user's head. By capturing images of the display screen through the headset camera and correlating pupil position with screen coordinates, the system adapts to head movement while maintaining measurement precision.
2Measurement precision
If gaze position tracking systems require the user's head to be held steady, then measurement precision is improved, but adaptability to different usage scenarios deteriorates
Solution Approach 1:
The headset-mounted camera system serves multiple functions: it captures the user's field of view, tracks head movement, correlates pupil position with screen coordinates, and adapts to different usage scenarios including gaming, advertising analysis, and accessibility applications. This multi-functional approach enables the system to maintain measurement precision across diverse real-world situations.
Solution Approach 2:
The system transitions from a static tracking approach to a dynamic one where the headset camera moves with the user's head. The system continuously captures images through the headset camera, updates the correlation between pupil position and screen coordinates in real-time, and adapts to changing head positions, enabling versatile application in various tracking situations.
3Ease of operation
If a headset system with cameras and processing equipment is used, then adaptability and ease of operation are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into an integrated headset system that merges eye tracking sensors, headset-mounted cameras, and processing capabilities into a single wearable device. This consolidation improves ease of operation by providing hands-free cursor control while managing device complexity through integrated design rather than separate components.
Solution Approach 2:
The system incorporates automatic calibration and correlation functions that perform themselves without requiring complex manual setup. The headset camera automatically captures reference images of the display, and the system autonomously establishes the correlation between pupil position and screen coordinates, reducing the operational burden on the user despite the increased device complexity.
Data Source
AI summary
Correlating pupil position to gaze location within a scene. Illustrative embodiments may include correlating pupil position of a user to gaze location within a scene viewed by the user. The correlating may include: illuminating an eye of the user, the eye containing the pupil, and the illuminating with light; creating a first video stream depicting the eye; creating a second video stream depicting the scene in front of the user; determining pupil position within the first video stream; calculating gaze location in the second video stream based on pupil position in the first video stream; and sending an indication of the gaze location in the second video stream to a computer system.