Gyro Sensor Drift Correction via Gravity-Axis Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In motion capture technologies using gyro sensors, drift errors accumulate over time, leading to unnatural avatar videos, and existing correction methods require user intervention, affecting convenience.
Innovation Solution
An information processing method and apparatus that estimate posture information using gyro sensors and correct the first rotation angle based on conditions related to the second rotation angle, allowing for automatic correction without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor method is used for motion capture, then the system can acquire motion information, but drift errors accumulate over time causing unnatural avatar videos
Solution Approach 1:
The system uses feedback from the second rotation angle (around axis orthogonal to gravity) to correct the first rotation angle (around gravity axis). When the condition regarding the second rotation angle is satisfied, the system automatically adjusts the first rotation angle to compensate for drift errors, creating a closed-loop correction mechanism that maintains accuracy over time.
Solution Approach 2:
The system changes the parameter being corrected from direct sensor output to a conditioned rotation angle. By monitoring the second rotation angle and using its state to determine when and how to correct the first rotation angle, the system transforms the raw sensor data into a more reliable posture parameter that accounts for drift accumulation.
2Ease of operation
If automatic correction is implemented, then user convenience is improved, but system complexity increases
Solution Approach 1:
The system performs self-correction by automatically monitoring its own sensor output and adjusting the first rotation angle when drift is detected through the second rotation angle condition. This eliminates the need for user intervention or manual calibration, allowing the system to maintain accuracy autonomously without increasing operational complexity for the user.
Data Source
AI summary
There is provided an information processing method to improve convenience for a user regarding correction of a drift error. The information processing method includes performing an estimation of posture information of a moving body including a first rotation angle around an axis in a gravity direction and a second rotation angle around an axis orthogonal to the gravity direction on the basis of an output from a gyro sensor attached to the moving body; and performing a correction of the first rotation angle in a case where a condition regarding the second rotation angle is satisfied.