Movable Camera IPD Measurement for Accurate Wearable Fitting
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Solution Overview
Problem
Conventional interpupillary distance measurement techniques using single or multiple fixed cameras are inaccurate and costly, and require complex hardware adjustments, leading to discomfort and diminished visual performance in wearable devices.
Innovation Solution
A method and apparatus utilizing movable cameras and light sources to capture images from different positions, calculating interpupillary distance based on captured images and calibration parameters, reducing hardware costs while improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed cameras are used for interpupillary distance measurement, then measurement can be performed, but measurement precision is insufficient and hardware cost increases
Solution Approach 1:
The patent transforms fixed cameras into movable cameras that can dynamically adjust their positions. The camera assembly includes a movable platform that allows cameras to move along predetermined trajectories, enabling flexible positioning without requiring multiple fixed cameras. This dynamic configuration improves measurement precision while reducing hardware complexity.
Solution Approach 2:
The movable camera system serves multiple functions: it can capture images from different positions, adjust to various measurement requirements, and replace multiple fixed cameras with a single reconfigurable system. The camera assembly can be positioned at different locations to obtain diverse viewing angles, making the system universally applicable for accurate interpupillary distance measurement.
2Measurement precision
If multiple fixed cameras are deployed to improve measurement accuracy, then measurement precision improves, but device complexity and cost increase
Solution Approach 1:
The patent merges the functionality of multiple fixed cameras into a single movable camera assembly. By combining multiple cameras on one movable platform and allowing them to move to different positions, the system achieves the measurement capabilities of multiple fixed cameras while using fewer physical components, thereby reducing device complexity and cost.
3Measurement precision
If cameras are moved to different positions for measurement, then measurement precision improves, but ease of operation decreases
Solution Approach 1:
The patent implements predetermined movement trajectories for the cameras. Before actual measurement, the system pre-plans the camera movement paths and positions. During operation, cameras automatically follow these predetermined trajectories, eliminating the need for manual positioning adjustments and maintaining operational simplicity while achieving high measurement precision.
Solution Approach 2:
The system incorporates feedback mechanisms to monitor camera positions and adjust movements automatically. Sensors and control systems provide real-time feedback on camera location, enabling the system to maintain precise positioning without requiring manual intervention, thus preserving ease of operation while improving measurement accuracy.
Data Source
AI summary
Embodiments of the disclosure provides a scheme for interpupillary distance measurement, in particular to a method, an apparatus, an equipment, a storage medium for interpupillary distance measurement. According to embodiments described herein, during the interpupillary distance measurement, the control unit moves the two cameras from their respective initial positions to their respective end positions, and during the moving process, the two cameras are controlled to capture the left-eye image and the right-eye image, respectively. Further, the control unit determines corresponding calibration parameters for obtaining the interpupillary distance, and obtains the interpupillary distance of the user based on the corresponding calibration parameters and the captured images.