Head-Mounted Display Eye Tracking Calibration With Random Points
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Solution Overview
Problem
Traditional head-mounted displays (HMDs) face inaccuracies in eye tracking calibration due to users predicting the position, order, or frequency of calibration points, affecting the accuracy of collected data.
Innovation Solution
The HMD displays calibration points sequentially on preset positions based on current time and number, using a random selection process to prevent user prediction, and generates calibration data from captured eye images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If calibration points are displayed in a fixed pattern, then the calibration process is simple and easy to operate, but users can predict the position and order of calibration points, reducing measurement precision
Solution Approach 1:
The patent applies dynamics by transitioning from a static fixed pattern to a dynamic random pattern for calibration point display. The calibration points are now displayed in random positions and orders each time calibration is performed, preventing user prediction while maintaining ease of operation through automated randomization controlled by the processor.
Solution Approach 2:
The patent changes the positional parameters of calibration points from fixed to random values. The processor generates random positions and display orders for calibration points, fundamentally altering the spatial and temporal parameters of the calibration process to eliminate predictability while preserving operational simplicity.
2Measurement precision
If calibration points are displayed in a random manner, then measurement precision is improved by preventing user prediction, but device complexity increases due to randomization control
Solution Approach 1:
The system performs self-service through automated randomization. The processor automatically generates random positions and display orders for calibration points without requiring user intervention or complex manual configuration. This eliminates the need for users to understand or control the randomization process, keeping the interface simple while achieving random display.
Solution Approach 2:
The patent replaces any potential mechanical or manual randomization system with an electronic/software-based random number generator in the processor. This substitution reduces physical complexity while maintaining or improving the randomness quality, as software-based randomization can be more controllable and reproducible than mechanical methods.
Data Source
AI summary
A head-mounted display and a method for eye tracking calibration are provided. The head-mounted display includes a display, an image capture device, and a processor. The image capture device captures an eye image during a display of calibration points. The processor is coupled to the display and the image capture device, wherein the processor is configured to: display the calibration points on positions of a position set sequentially in an order according to a current time and number of positions via the display; and generate calibration data according to the eye image.