Pitcher Evaluation Apparatus Using Body Motion and Ball Behavior Error
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Solution Overview
Problem
Current evaluation methods for baseball pitchers only assess the behavior of the thrown ball, neglecting the influence of pitching form on the batter's prediction and performance, which is crucial for accurate ball behavior prediction and hitting.
Innovation Solution
An evaluation apparatus and method that assesses a pitcher by calculating the error between predicted and actual ball behavior from pitching form data, using time series data from both body movement and ball behavior, providing an evaluation index linked to game performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only ball behavior is evaluated, then evaluation simplicity is maintained, but evaluation comprehensiveness deteriorates
Solution Approach 1:
The evaluation is segmented into two independent components: ball behavior evaluation and pitching form evaluation. Each component is processed separately through dedicated processing circuits, allowing comprehensive evaluation while maintaining operational simplicity. The segmentation enables parallel processing of multiple evaluation dimensions without increasing overall system complexity.
Solution Approach 2:
The evaluation system achieves multi-functionality by simultaneously performing ball behavior analysis and pitching form analysis through a unified evaluation apparatus. The system universally handles both types of data processing and integration, providing comprehensive pitcher evaluation without requiring separate independent systems for each evaluation dimension.
2Loss of information
If pitching form evaluation is added, then evaluation comprehensiveness is improved, but system complexity increases
Solution Approach 1:
The system segments evaluation functions into distinct processing circuits: one for ball behavior data and another for pitching form data. This segmentation allows comprehensive evaluation while keeping each processing module relatively simple and independent, reducing overall system complexity through modular design.
Solution Approach 2:
The evaluation value calculation circuit acts as an intermediary that integrates results from both ball behavior processing and pitching form processing. This intermediary component synthesizes multiple evaluation dimensions into a unified evaluation result, managing system complexity by providing a centralized integration point rather than requiring complex direct interactions between all system components.
3Measurement precision
If error-based evaluation is used, then prediction difficulty quantification is achieved, but measurement precision requirements increase
Solution Approach 1:
The system uses feedback by calculating the error between predicted ball behavior (based on pitching form) and actual ball behavior. This error metric provides quantitative feedback on prediction difficulty, allowing the system to evaluate pitchers based on how well their form predicts outcome while managing measurement requirements through comparative analysis rather than absolute precision demands.
Data Source
AI summary
Provided is an evaluation apparatus and the like for evaluating a subject from a body motion of the subject and a behavior of an object accompanying the body motion of the subject. The evaluation apparatus evaluates, using time series data related to a body movement of a subject and time series data related to a behavior of an object accompanying the body movement, the subject on the basis of an error between a behavior of the object estimated from the body movement and an actual behavior of the object.