Dynamic Parallax Correction in Head-Borne Video Systems
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Solution Overview
Problem
Head-mounted video systems suffer from parallax errors due to the displacement of the camera aperture relative to the user's eye, leading to inaccuracies in hand-eye coordination and depth perception, especially when viewing objects at different distances.
Innovation Solution
A dynamically corrected parallax system that includes a head-borne video source and a display device, where the video data is electronically offset to compensate for the displacement between the camera and the display, using a controller and display electronics module to adjust the image alignment based on the focus position and displacement distance, ensuring accurate image representation at all distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the camera aperture is displaced from the user's eye position, then the system can be configured as a head mounted display with separate camera and display components, but parallax error occurs causing incorrect perceived object positions
Solution Approach 1:
The system dynamically changes the video image offset parameter based on the distance to the object of interest. The controller calculates the required offset amount using the focus distance and camera displacement, then applies this offset to the video data to correct parallax error at any range
Solution Approach 2:
The parallax correction system transitions from a static fixed alignment to a dynamic correction mechanism. The offset amount is continuously adjusted based on real-time focus distance measurements, allowing the system to adapt to objects at varying distances and maintain accurate hand-eye coordination
2Measurement precision
If the system is aligned to remove parallax at a fixed distance, then parallax is corrected at that specific range, but the system becomes misaligned at all other distances
Solution Approach 1:
The system employs dynamic parallax correction where the offset amount is continuously adjusted based on the distance to the object of interest. This allows the system to maintain accurate alignment across all distances rather than being fixed at a single range
Solution Approach 2:
The system uses focus distance measurement as feedback to dynamically adjust the video offset. The controller receives distance information and automatically calculates the appropriate correction amount, creating a closed-loop system that adapts to varying object distances
3Ease of operation
If the video image is offset to correct parallax, then hand-eye coordination is improved, but the image alignment must be dynamically adjusted for different object distances
Solution Approach 1:
The system automatically performs parallax correction without requiring manual user adjustment. The controller autonomously calculates the offset based on focus distance and applies it to the video data, making the complex dynamic alignment process transparent to the user
Solution Approach 2:
The system replaces manual mechanical alignment adjustments with electronic video offset control. Instead of physically moving the camera or display components, the system electronically shifts the video image to achieve parallax correction, simplifying the user interface while maintaining accuracy
Data Source
AI summary
Systems and methods for viewing image data. The system includes a head borne image source, a controller, an eyepiece lens assembly and a display device. The head borne image source images an object and provides the image data. The controller determines a focus adjustment from a focus position of the head borne image source. The display device receives and displays the image data to a user's eye via the eyepiece lens assembly. A distance between the eyepiece lens assembly and the display device is adjusted based on the focus adjustment responsive to the focus position.