Stereoscopic Display Calibration via Camera-Based Eye Tracking
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Solution Overview
Problem
Current stereoscopic display devices cause dizziness in users due to mismatched interpupillary distance and eye relief parameters, as they are preset and not customizable to individual users, leading to a ghost phenomenon and deviation in depth perception.
Innovation Solution
A stereoscopic display device with a camera and processor that calibrates interpupillary distance and eye relief parameters based on a user's two-eye visual angle, allowing for personalized parameter settings to improve user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If preset interpupillary distance parameter is used for display, then device complexity is reduced, but measurement precision of user-specific parameters deteriorates causing ghost phenomenon and dizziness
Solution Approach 1:
The system automatically captures user eye images, calculates two-eye visual angles, and determines personalized interpupillary distance and eye relief parameters without manual intervention. The stereoscopic display device performs self-calibration by processing captured images through the processor to extract gaze direction information and compute accurate display parameters specific to each user.
Solution Approach 2:
The system dynamically adjusts display parameters (interpupillary distance and eye relief) based on captured user characteristics. By changing these parameters from fixed preset values to user-specific calculated values, the system eliminates ghost phenomenon and improves stereoscopic display accuracy while maintaining ease of operation through automatic adjustment.
2Device complexity
If preset eye relief parameter is used for display, then device complexity is reduced, but measurement precision of viewing distance deteriorates causing depth perception deviation and dizziness
Solution Approach 1:
The system automatically determines user-specific eye relief parameters by analyzing captured eye images and calculating two-eye visual angles. This self-calibration process eliminates the need for manual parameter setting while achieving precise customization of viewing distance parameters for each user.
Solution Approach 2:
The system transforms fixed preset eye relief parameters into dynamically calculated user-specific values based on captured gaze information. This parameter adaptation ensures accurate depth perception and eliminates dizziness caused by mismatched viewing distance parameters.
3Adaptability or versatility
If hardware adjustment functions are provided, then adaptability to different users is improved, but manufacturing precision requirements increase leading to large adjustment errors
Solution Approach 1:
The system replaces mechanical hardware adjustment mechanisms with an optical/image-processing-based parameter calibration approach. By using camera capture and computational geometry to determine display parameters, the system achieves high precision user customization without relying on mechanical adjustment precision, thereby eliminating large adjustment errors.
Data Source
AI summary
The invention provides a parameter calibration method, applicable to a stereoscopic display device including a camera. The parameter calibration method includes the following steps: displaying a virtual object for calibration; obtaining, by using the camera, a two-eye visual angle by which the virtual object for calibration is watched; calibrating a human eye parameter according to the two-eye visual angle, where the human eye parameter includes at least one of an interpupillary distance parameter and an eye relief parameter; and setting the stereoscopic display device according to the calibrated human eye parameter, such that the stereoscopic display device displays according to the calibrated human eye parameter. In addition, a stereoscopic display device using the parameter calibration method is also provided.