Ball Movement Analysis for Frame Selection in Sports Judgment
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Solution Overview
Problem
In ball sports, the time required for 'in-out' judgments, determining whether a ball is inside or outside the court, is increased due to the need for judges to manually select relevant frames from multiple camera angles.
Innovation Solution
A judgment-assistance system that displays frames from multiple cameras side by side, extracts movement information of the ball, detects direction reversals, and highlights the most relevant frames based on velocity components, allowing for quicker selection of frames for judgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple frames from different camera angles are displayed side by side for in-out judgment, then the availability of judgment information is improved, but the time required for judges to find the relevant frame increases
Solution Approach 1:
The system performs self-service by automatically analyzing the ball's movement trajectory and selecting the most appropriate camera angle frames without human intervention. The frame selection unit autonomously determines which frames to highlight based on the ball's position and movement direction, eliminating the need for judges to manually search through multiple frames.
Solution Approach 2:
The patent replaces the mechanical manual search process with an automated information processing system. The movement-information extracting unit and frame selection unit use computational algorithms to analyze ball trajectory and select optimal frames, substituting the manual visual search mechanism with an automated digital processing system.
2Adaptability or versatility
If judges manually search through multiple displayed frames to find the relevant one, then comprehensive view of all camera angles is maintained, but the judgment efficiency decreases
Solution Approach 1:
The system extracts only the most relevant frame information needed for judgment from the complete set of multiple camera angles. By identifying and highlighting the specific frame where the ball's position relative to the line can be most accurately determined, the system separates essential judgment information from redundant visual data.
Solution Approach 2:
The system performs preliminary analysis of ball movement trajectory and position before the judge makes the final determination. By pre-processing the video data to identify the critical moment and optimal viewing angle, the system prepares the most useful information in advance, allowing the judge to make a quicker decision.
Data Source
AI summary
A judgment-assistance processing device includes a frame-display control unit that causes frames of lines on a court for a ball sport to be displayed on a display unit; a movement-information extracting unit that detects a ball from the frames displayed on the display unit and extracts movement information that indicates the moving velocity and the moving direction of the ball; an upon-reversal information extracting unit that detects whether the moving direction of the ball is reversed in the first direction and extracts at least the magnitude of the component of the moving velocity of the ball upon reversal; a frame selecting unit that selects the one or more frames from the frames in accordance with the magnitude of the component of the moving velocity of the ball upon reversal; and a highlighted-display control unit that highlights the one or more frames that are selected from the frames.