3D Eye Tracking via Multi-Point Spatial Triangulation
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Solution Overview
Problem
Conventional eye tracking technologies are limited to tracking users' gaze on two-dimensional screens, hindering the provision of various services in three-dimensional spaces.
Innovation Solution
An eye tracking system comprising a data collection unit, an eye tracking unit, and an eye-related analysis unit that acquires user face and location information from multiple points in a three-dimensional space to estimate gaze locations, analyze gaze distribution, and apply highlight effects or warnings based on user data, including body information, to enhance tracking accuracy and adaptiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional eye tracking technology is used, then eye tracking on two-dimensional screens is achieved, but tracking accuracy in three-dimensional spaces is insufficient
Solution Approach 1:
The patent transitions from two-dimensional screen-based eye tracking to three-dimensional space tracking by introducing depth information through multiple photographing devices positioned at different locations. This dimensional expansion enables accurate gaze tracking in 3D environments while maintaining measurement precision through spatial triangulation of pupil positions across multiple camera views.
Solution Approach 2:
The system divides the 3D space into multiple measurement zones by strategically positioning photographing devices at different points. Each device captures eye data from its specific viewpoint, and the system integrates these segmented measurements to achieve comprehensive and accurate 3D gaze tracking throughout the entire space.
2Measurement precision
If multiple photographing devices are installed at different points in three-dimensional space, then gaze tracking accuracy in 3D space is improved, but system complexity increases
Solution Approach 1:
Multiple photographing devices are designed with identical structural configurations and functional capabilities, each serving as a independent but equivalent measurement unit. This universality simplifies the overall system design by using repeated modular components rather than complex heterogeneous systems, making the 3D tracking capability achievable through standardized device replication.
Solution Approach 2:
The system uses identical copies of photographing devices positioned at different locations to capture eye data from multiple viewpoints. By replicating the same functional unit rather than designing a complex single-device solution, the system achieves 3D tracking accuracy while maintaining relatively simple device architecture that can be manufactured and deployed consistently.
Data Source
AI summary
A system for eye-tracking according to an embodiment of the present invention includes a data collection unit that acquires face information of a user and location information of the user from an image captured by a photographing device installed at each of one or more points set within a three-dimensional space and an eye tracking unit that estimates a location of an area gazed at by the user in the three-dimensional space from the face information and the location information, and maps spatial coordinates corresponding to the location of the area to a three-dimensional map corresponding to the three-dimensional space.