HMD Eye Gaze Calibration via Moving Object Route Matching
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Solution Overview
Problem
Conventional head-mounted displays (HMDs) require time-consuming eye gaze calibration processes, which are cumbersome for users.
Innovation Solution
An HMD system that detects the routes of moving objects and the user's eye gaze direction, using a reference object or reference point for calibration, allowing for eye gaze calibration without the need for an additional calibration screen or time, by setting a virtual line between the pupil and the reference object or point to determine the intersection point and adjust the display position accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional eye gaze calibration method is used, then calibration accuracy is improved, but calibration time increases
Solution Approach 1:
The system performs preliminary detection of moving objects and their routes before calibration is needed. By pre-processing the environment to identify potential reference objects and their movement patterns, the system prepares calibration data in advance, eliminating the need for time-consuming calibration screens while maintaining accuracy.
Solution Approach 2:
The calibration system uses the user's own eye movement patterns and the natural movement of objects in the environment to perform self-calibration. The system automatically detects when the user's gaze route coincides with object movement routes, using the user's natural behavior rather than requiring artificial calibration procedures.
2Measurement precision
If separate calibration process is required, then calibration accuracy is improved, but user convenience deteriorates
Solution Approach 1:
The system merges the calibration process with normal usage by combining eye gaze detection with moving object detection. Instead of separating calibration into a distinct phase, the system integrates both functions, using the same detection mechanisms to identify both reference objects and calibration data simultaneously.
Solution Approach 2:
The eye gaze detection unit and moving object detection unit serve multiple functions: they detect both the user's gaze direction for display positioning and the movement routes of objects for calibration. This multi-functionality eliminates the need for separate calibration screens while maintaining calibration accuracy.
3Measurement precision
If calibration screen is displayed, then calibration accuracy is improved, but device complexity increases
Solution Approach 1:
The system extracts the calibration function from the display system and integrates it into the existing camera and processing units. By removing the need for dedicated calibration screens and using the same detection hardware for both object recognition and calibration, the system reduces overall device complexity.
Data Source
AI summary
A control method of a head mounted display (HMD) is disclosed. The control method of the HMD includes detecting a first route of a first moving object and a second route of a second moving object in front of the HMD, detecting a third route along which user's eye gaze moves, setting the first moving object as a reference object if the detected first route is substantially identical with the detected third route, setting the second moving object as the reference object if the detected second route is substantially identical with the detected third route, and performing an eye gaze calibration based on a route of the set reference object and the detected third route.