• Journal of Advanced Navigation Technology
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• v.21 no.2
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• pp.200-205
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• 2017

Modern sports are developing into sports science that incorporates science and various analytical simulation systems for improving records are being developed, and they are helping to improve actual game records. Therefore golf which is one of various sports events, has been popularized among the hobbyists and the general public and there is an increasing demand for correcting the movement attitude of the person. In response to these demands, many systems have been developed to analyze and correct golf swing postures. The golf swing accuracy analysis system analyzes the moments that can not be seen with the naked eye and guides them to understand easily. It can improve the golf swing motion through immediate feedback due to the visual effect. Using the knowledge of golf swing motion collected from golf swing video, we improved reliability. In addition, it provides the ability to visually check and analyze your golf swing video, allowing you to analyze each segment based on various golf swing classification methods.

• Asian Journal of Turfgrass Science
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• v.13 no.4
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• pp.181-190
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• 1999

This study was carried out to survey green system, area, green slope, green turfgrass variety, green section, and particle size of green construction materials, and to investigate and evaluate the characteristics of Design and Construction in Korean golf course green for improving the quality of Korean golf course into that of the international golf course held international tournament. The results were as follows. 1. The greens of 129 Korean golf courses consisted of 2(two) green system and 1(one) green system. 2(two) green system was 50.8%, 1(one) green system was 40.7%, and 1+2 green system was 8.5% of them. 2. In 48 Korean golf courses, the green area of 2(two) green system was mostly 400~$600\m^2$(56.5%) and the green area of 1(one) green system was mostly 600~$800\m^2$(47.8%). In 48 Korean golf courses, 1.5~3% green slope appeared the highest frequency(50.0%) and the next was 3~5%(29.4%). 3. Penncross variety was the highest frequency(71.2%). The next was mixed variety (Penncross+Crenshaw, Penn A-1, Pennlinks, or Penneagle/SR 1020+SR 1019) and the frequency of mixed variety was 7.6%. 4. In 48 Korean golf courses, 70~80cm total thickness of green appeared the highest frequency(36.1%), 10~20cm thickness of green mixed sandy layer appeared the highest frequency(43.6%), and 10~20cm thickness of green coarse sandy layer appeared the highest frequency(55.6%). 0~10cm thickness of green gravel layer appeared the highest frequency(67.6%), 20~30cm thickness of green drain layer appeared the highest frequency(52.8%), and 20~30cm width of green drain layer appeared the highest frequency(44.4%). Below 1mm sand diameter used in green mixed sandy layer appeared the highest frequency(46.2%), below 2mm or over 2mm sand diameter used in green coarse sandy layer appeared the highest frequency(31.4%). 20~40mm coarse gravel diameter used in green gravel layer appeared the highest frequency(43.2%) and 0~20mm fine gravel diameter used in green gravel layer appeared the highest frequency(65.8%). 20~40mm gravel diameter used in green drain layer appeared the highest frequency(64.1%).

• Journal of Electrical Engineering and Technology
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• v.11 no.2
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• pp.508-518
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• 2016

In this paper, we propose a method combining an accelerometer with a cross structured light system to estimate the golf green slope. The cross-line laser provides two laser planes whose functions are computed with respect to the camera coordinate frame using a least square optimization. By capturing the projections of the cross-line laser on the golf slope in a static pose using a camera, two 3D curves’ functions are approximated as high order polynomials corresponding to the camera coordinate frame. Curves’ functions are then expressed in the world coordinate frame utilizing a rotation matrix that is estimated based on the accelerometer’s output. The curves provide some important information of the green such as the height and the slope’s angle. The curves estimation accuracy is verified via some experiments which use OptiTrack camera system as a ground-truth reference.

• Journal of Digital Convergence
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• v.10 no.2
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• pp.201-209
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• 2012

In the research, we develope and use the digital score card to prevent disqualifying with error as inputting wrong score card and to protect the player in this paper. Also, it will lead the world wide market as IT and golf strong country. Therefore, we checked the mutual relationship through the analysis and verification with research of contents and collection of questionnaire regarding the research. In the result of analysis, S/W need output function and data management to play golf and H/W need the simple design and durability for user easy access and multi function excluding score card. Therefore, the development of digital golf score card will contribute athletic performance through removing the inconvenience of current score card. And we confirmed that developed digital golf card model and system is very important to open world market.

• Journal of the Korean Home Economics Association
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• v.42 no.6
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• pp.89-101
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• 2004

The aim of this study is to investigate problems with both fit and abrasion of golf gloves through a survey of golf usage among golfers over the age of 30, as well as by analyzing the golf glove industry with an emphasis on the size system and marketing situation. In addition, this study aims to suggest the basic raw materials for improving the design of golf gloves through physical properties inspections. The results of the analyses support the following suggestions. First of all, dissatisfaction arose from improper measurement in glove length. The survey showed that most problems occur in the pinky finger, while only the length of the middle finger of the glove is recorded based on Korean Standard Anthropometries Measurement. Clearly, proper measurements of every finger need to be included in the system. Secondly, the survey results clearly indicated regions 7(palm area) and 3(second finger area) as the areas requiring reinforcement. While the method of patching another layer with the same material is commonly used in the current glove market, materials other than genuine leather are unable to complement the abrasion. This study suggests that another layer of refill type genuine leather, which scored best in the physical properties inspection, needs to be patched onto regions 7 and 3.

• Korean Journal of Applied Biomechanics
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• v.31 no.2
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• pp.87-94
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• 2021

Objective: Identification of meaningful patterns and trends in large volumes of unstructured data is an important task in various research areas. In the present study, we gathered golf swing image data and did quantitative analysis of swing image. Method: We collected golf swing images of 30 novice players and 30 professional players in this study. Results: We selected important features of swing posture and employed data mining algorithm to classify whether a player is an expert or a novice. Moreover, our proposed method could offer quantitative advices for golf beginners for correcting their swing. Conclusion: Finally, we found a possibility that our proposed method can be expanded to golf swing correction system

• Korean Journal of Applied Biomechanics
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• v.14 no.3
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• pp.177-189
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• 2004

Kinematic and kinetic analysis using 3D Motion Capture system are common, yet there is little in the literature that discuss the relationship and coactivity between muscles during the golf swing. The purpose of this study was to describe the relationship between the employed 16 muscles during golf swing. We could observe 3 muscle patterns such as 'Line' shape, 'L' shape, and 'Loop' shape for the golf swing activity. The 'Line' shape indicates that two muscles act almost perfectly in phase, and the 'L' shape represents that two muscles act in a reciprocating manner(When one is active, the other is quiescent and vice versa). And the 'Loop' shape indicates that two muscles act sequently(After one is active, the other act). In these results, we knew the muscle patterns during golf swing is similar to the patterns during gait. And we presented it was possible to show the consistence of golf swing through the frequency analysis of muscle patterns. We believe that the results potentially useful for the golf players and coaches to analyze their performance.

• Journal of Sport and Applied Science
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• v.6 no.1
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• pp.1-4
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• 2022

Purpose: The purpose of this study is to provide implications for virtual golf safety management in Korea through the literature review of current safety issues of virtual golf industry. Research design, data, and methodology: This study employed a qualitative approach to review prior studies and related documents presenting current safety perspectives of virtual sports facility management. First, the study reviewed the experiences of virtual golf players and safety criteria suggested from previous literatures. Second, two experts in sport facility management reviewed the manuscript including implications and provided their opinions including major implications and insights for virtual sport industry. Views of experts were added to the final manuscript. Results: This study found that installation standards and safety and hygiene standards by industry are enacted for the safety management of sports facilities, however, there is a need for standards to be adjusted because the contents are general, abstract, and lack detail, thus causing difficultly to secure effectiveness. Conclusions: For virtual golf courses, it is necessary to develop a safety inspection checklist that suits the characteristics of indoor virtual golf. In this line, safety criteria need to be developed with the consideration of characteristics of screen golf to establish an efficient safety management system and create a safe use environment.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.875-879
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• 2009

In this paper, we propose the measurement camera system of flight data of golfball for the application of screen golf contents. The existing flight data extraction system that applied on the screen golf content divided plate is dependent on it. in this paper, the camera system install in the ceiling that is able to look at passing golf ball. And left-handed and left-handed bats in the clear of the restrictions. Using high-speed CCD camera is shooting the ball flying. Acquired image is calculated from the coordinates. The location information of the calculated golf ball calculates a speed and a direction by using the physical formula, it applies the golf contents. After this system is useful sports type contents baseball, soccer, tennis.

• Journal of Broadcast Engineering
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• v.18 no.3
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• pp.380-392
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• 2013

A method to classify a golf swing motion into 7 sections using a Kinect sensor and a fuzzy system is proposed. The inputs to the fuzzy logic are the positions of golf club and its head, which are extracted from the information of golfer's joint position and color information obtained by a Kinect sensor. The proposed method consists of three modules: one for extracting the joint's information, another for detecting and tracking of a golf club, and the other for classifying golf swing motions. The first module extracts the hand's position among the joint information provided by a Kinect sensor. The second module detects the golf club as well as its head with the Hough line transform based on the hand's coordinate. Using a fuzzy logic as a classification engine reduces recognition errors and, consequently, improves the performance of robust classification. From the experiments of real-time video clips, the proposed method shows the reliability of classification by 85.2%.