Golf Club Head Measurement Mark and Image Processing
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Solution Overview
Problem
Conventional methods for photographing a golf club head in motion struggle to accurately detect the position and velocity of the club head, making it difficult to obtain precise information about the club head's state during a swing.
Innovation Solution
A mark for club head measurement with a central portion having lower lightness and a peripheral portion with higher lightness, designed as doughnut-shaped patterns, is applied to the club head, along with an image processing device that detects and generates information about the club head's state, including trajectory and face images, to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a club head is simply photographed from above during a swing, then the photographic process is simple and quick, but the detection accuracy of club head position and face is insufficient
Solution Approach 1:
The patent applies a mark with distinct brightness patterns (dark central portion and bright peripheral portion) on the club head. This brightness contrast enables the image processing device to easily distinguish the mark from the background and accurately detect the club head position and face orientation by analyzing the lightness distribution in the photographic images.
Solution Approach 2:
The mark serves as an intermediary element between the club head and the image processing system. By placing this high-contrast mark on the club head, the system can indirectly measure club head position and face orientation through image analysis, achieving high measurement precision without requiring complex direct sensing equipment on the club head.
2Measurement precision
If a simple photographing method is used, then the system is easy to operate, but the obtained information about club head state is inaccurate
Solution Approach 1:
The mark is pre-applied to the club head before the swing occurs. This preliminary preparation ensures that when the club head is photographed during the swing, the image processing device can immediately detect the mark and extract accurate position and face information without requiring complex real-time adjustments or operations during the swing itself.
Solution Approach 2:
The system captures a two-dimensional photographic image (copy) of the three-dimensional club head. The mark on the club head creates a distinctive pattern in this image copy that allows the image processing device to accurately reconstruct club head position and face orientation information from the simple photograph, maintaining ease of operation while improving measurement precision.
3Measurement precision
If no mark is used on the club head, then the club head appearance is simple, but the detection of club head position and face from photographic images is difficult
Solution Approach 1:
The mark employs asymmetric brightness distribution with a dark central portion and a bright peripheral portion. This asymmetric pattern creates a unique lightness signature that allows the image processing device to distinguish the mark from symmetric or uniform features on the club head, enabling accurate detection of the mark position and club head face orientation through image analysis.
Data Source
AI summary
An image processing device for use with a mark for club head measurement in use for measuring information about a state of a club head of a golf club, the mark being provided on the club head, the image processing device including a mark detector configured to acquire time-series photographic images in which the club head is photographed when the golf club having the club head with the mark for club head measurement is swung, and to detect the mark for club head measurement from each of the photographic images; and a head information generator configured to generate information about a state of the club head, based on the mark for club head measurement detected by the mark detector.