AR Model Positioning Correction via Inertial Sensor Mediation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current augmented reality (AR) systems experience jumps or sudden movements of AR models due to errors in visual odometry, leading to misalignment with the actual environment, especially when visual tracking is difficult or not available.
Innovation Solution
The method involves receiving GNSS position data and camera image information to determine camera position and orientation, detecting changes in the AR model's position or rotation, and adjusting the AR reference frame relative to the geospatial reference frame using inertial sensor data to align the AR model with the actual environment, thereby correcting for jumps and maintaining accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual odometry is used to track AR model position, then the AR model can be displayed in the real-world environment, but jumps and misalignment occur due to errors in visual tracking
Solution Approach 1:
The patent introduces an intermediary correction mechanism that uses inertial sensor data as a mediator between the visual odometry system and the AR model positioning. The inertial sensors provide alternative position and orientation measurements that serve as a reference to detect and correct jumps caused by visual tracking errors, thereby improving positioning reliability without requiring perfect visual tracking precision
Solution Approach 2:
The system implements feedback by continuously monitoring AR model position changes using both visual odometry and inertial sensors, comparing the measurements, and applying corrections when discrepancies exceed a threshold. This closed-loop feedback mechanism detects jumps in real-time and compensates for them, maintaining accurate AR model positioning despite visual tracking errors
2Measurement precision
If multiple sensor types are integrated to correct positioning errors, then positioning accuracy improves, but device complexity increases
Solution Approach 1:
The patent segments the positioning system into distinct functional modules: visual odometry module, inertial sensing module, and correction module. Each module operates independently with specific responsibilities, and they are integrated through a standardized interface that compares measurements and applies corrections. This segmentation allows for easier implementation and maintenance while achieving improved positioning precision through multi-sensor integration
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Methods for displaying an augmented reality (AR) model on an AR device are disclosed. Alignment between a geospatial reference frame and an AR reference frame is monitored and adjusted to improve placement of the AR model displayed on the AR device.