Performance Display With 3D Joint-Angle Scoring Detection
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Solution Overview
Problem
It is difficult for judges to accurately assess the joint angles of athletes during performances due to variations in scoring based on individual judges' interpretations, leading to inconsistent scores.
Innovation Solution
A performance display program and apparatus that utilizes 3D laser sensors to determine joint positions and angles, applying scoring rules through a database and calculation formulas to provide uniform scoring information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If judges manually assess joint angles based on visual observation, then scoring can be performed quickly after performance, but measurement precision deteriorates due to subjectivity and individual interpretation differences
Solution Approach 1:
The patent replaces the manual visual assessment mechanism with an automated 3D sensing system using cameras and coordinate calculation algorithms. The joint angle measurement is transformed from subjective human judgment to objective computational geometry, where camera coordinates are converted to performance coordinate system and joint angles are calculated through mathematical formulas, eliminating human subjectivity while maintaining measurement accuracy.
Solution Approach 2:
The patent introduces a coordinate transformation intermediary system that converts raw camera coordinates into performance coordinate system through predefined transformation relationships. This intermediary layer enables accurate joint angle calculation by establishing a mathematical bridge between the sensing device coordinate system and the performance evaluation coordinate system, allowing precise measurement without direct manual intervention.
2Reliability
If multiple judges independently score performances, then scoring can be performed efficiently, but reliability deteriorates due to score variations depending on individual judges
Solution Approach 1:
The patent enables the performance assessment system to evaluate itself automatically without requiring multiple human judges. The 3D sensing system captures performance data, the coordinate transformation system processes the coordinates, and the calculation system automatically determines joint angles and scores according to predefined criteria. This self-service mechanism eliminates inter-judge variability while maintaining efficient scoring throughput.
Solution Approach 2:
The patent implements a feedback mechanism where the scoring system automatically compares calculated joint angles against predefined scoring criteria and provides immediate objective scores. This closed-loop feedback system ensures consistent application of scoring rules across all performances, eliminating the reliability issues associated with multiple human judges while maintaining rapid scoring capability.
3Measurement precision
If detailed rejudgement is performed through player opposition, then measurement precision can be improved, but loss of time increases due to additional review processes
Solution Approach 1:
The patent performs preliminary coordinate transformation and joint angle calculation during the performance capture phase, storing the transformed coordinates and calculated angles for potential review. This preliminary action prepares all necessary measurement data in advance, so that if player opposition requires detailed rejudgement, the precise measurements are already available without requiring additional time-consuming analysis, thus maintaining both accuracy and efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables consistent scoring by displaying joint angles and deductions in accordance with predefined rules, reducing subjectivity and facilitating accurate scoring.
Implementation Method 1
a position of a joint of a performer is determined from a sensing result of a sensor
Data Source
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AI summary
A video reproduction apparatus acquires and stores a performance image of a performer. The video reproduction apparatus identifies the position of a joint of the performer from the stored performance image of the performer. Then, the video reproduction apparatus calculates an angle formed by a joint used for scoring an element of an athletic event by using calculation information regarding a calculation formula for calculating the angle and the determined position of the joint of the performer. Then, the video reproduction apparatus displays the performance image and a scoring image having the angle displayed on the performance image so as to be compared with each other.