Motion Analysis Alignment Using Transformation Matrices
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Solution Overview
Problem
Existing motion analysis methods struggle to account for differences in physique and sensor placement between an exemplar and a beginner, leading to discrepancies in motion data, which can result in inappropriate advice being given to the beginner.
Innovation Solution
A motion analysis apparatus and method that includes a transformation matrix calculation unit to align motion data from an exemplar and a beginner, using features extracted from prescribed-motion data to create a transformation matrix that adjusts specified-motion data for the beginner, ensuring accurate and personalized feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motion measurement devices are attached to individuals to capture their motions, then motion data can be acquired, but differences in physique, dominant hand/foot, and sensor placement cause the data to be different even for the same motions
Solution Approach 1:
The patent applies parameter changes by calculating a transformation matrix that converts motion data parameters from the exemplar's coordinate system to the examinee's coordinate system. This transformation adjusts for differences in physique, dominant hand/foot, and sensor placement by modifying the data parameters through mathematical transformation, enabling accurate comparison and adaptation of motion data across different individuals.
2Ease of operation
If exemplar motion data is directly provided to the beginner, then advice can be given, but the data is not appropriate due to individual differences
Solution Approach 1:
The patent uses a transformation matrix as an intermediary to adapt the exemplar's motion data to the examinee's specific characteristics. This intermediary component processes the exemplar data through mathematical transformation, converting it into appropriate guidance data that accounts for the examinee's physique, dominant hand/foot, and sensor placement, thereby ensuring the advice is both actionable and accurate.
3Adaptability or versatility
If transformation matrix is calculated to align features between exemplar and examinee, then data comparability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating the transformation matrix using prescribed motion data collected from both the exemplar and the examinee. This matrix is computed in advance before actual motion analysis, storing the transformation parameters that will be applied during subsequent specified motion data processing. This preliminary computation simplifies the overall system by preparing the adaptation logic beforehand.
Data Source
AI summary
An operations analysis apparatus for motion includes a prescribed-motion data acquisition unit configured to acquire prescribed-motion data which is measured when an exemplar and an examinee perform a prescribed motion, respectively, and a feature extraction unit configured to extract exemplar features and examinee features, and a transformation matrix calculation unit configured to calculate a transformation matrix between the exemplar features and the examinee features, and a specified-motion data acquisition unit configured to acquire specified-motion data which is measured when the exemplar performs a series of specified motions, and a creation unit configured to, from the acquired set of specified-motion data regarding the exemplar, create a piece of exemplary specified-motion information for the examinee by using the calculated transformation matrix, and a indication unit configured to indicate the piece of exemplary specified-motion information for the examinee.