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Hareket analizinde kullanılan görüntü sisteminin hassasiyetinin belirlenmesi

Accuracy determination of camera system used for sport motion analysis

Journal Name:

  • Uluslararası İnsan Bilimleri Dergisi

Publication Year:

  • 2008

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
The aim of this study is to determine accuracy of camera system often used for motion analysis. In order to accomplish this, an industrial robot was moved with known three different trajectories and these motions were captured using three 100Hz cameras located in 3 different angles. Video data were digitized and analyzed using Simi Motion Analysis Program. With this program, angular kinematics were computed from the video data and compared with the data obtained from robot. For considering analysis of the data, average error for angle computed from average values of absolute error and root values of average of squared error is is 0.92° and 1.33°, respectively. Similarly, average error for angular velocity computed from average values of absolute error and root values of average of squared error is is 0.77° and 0.96°, respectively. These errors may result in the technique of image processing, shot speed of camera system and the limited hand sensivity of users. As motions in sports were analyzed with the camera systems, these errors must be taken in account in kinematic computation.
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Abstract (Original Language): 
Amacımız sportif hareketlerin analizinde sıklıkla kullanılan görüntü sisteminin hassasiyetinin belirlenmesidir. Bu amacı gerçekleştirmek için endüstriyel bir robotun önceden bilinen 3 farklı yörüngede hareket etmesi sağlanmış ve hareket 3 farklı açıya yerleştirilmiş 100 Hz hızındaki 3 kamera tarafından kaydedilmiştir. Direkt olarak bilgisayara aktarılan verilerin Simi hareket analiz sistemi ile açısal kinematiği hesaplanarak robottan elde edilen verilerle karşılaştırılmıştır. Açısal yer değiştirmede; hataların mutlak değerinin ortalaması ile elde edilen ortalama hata 0.92°, hataların karelerinin toplamından elde edilen ortalama hata 1.33°, açısal hız da ise; hataların mutlak değerinin ortalaması ile elde edilen ortalama hata 0.77°/s ve hataların karelerinin toplamından elde edilen ortalama hata 0.96°/s tespit edilmiştir. Bu hataların görüntü işleme tekniklerinden, kamera sistemlerinin hızından ve kullanıcı hatalarından kaynaklandığı düşünülmektedir. Sportif hareketler görüntü sistemleri ile analiz edilirken bu hata oranları göz önüne alınarak hesaplamalar yapılmalıdır.
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  • 2
1-7
  • Turkish

REFERENCES

References: 

1.
Abdel-Aziz, Y.I., Karara, H.M.(1971) Direct Linear Transformation from Comparator Coordinates into Object Space Coordinates in Close Range Photogrammetry. Presented At The ASP/VI Symposium on Close-Range Photogrammetry. American Society of Photogrammetry. Falls Chearch, VA. Urbana, 12: 1-18.
2.
Bahamonde, R.(2005) Review of the biomechanical function of the elbow joint during tennis strokes,International SportMed Journal, vol 6(2)
3.
Durward,BR., Kerr, A.,Kerr KM(2003) Usıng A Physıcal Pendulum To Test Accuracy And Precısıon Of The Proreflex 500 System. World Confederation of Physical Therapy Barcelona
4.
Haggard, P. and Wing, M.(1989)Assessing and reporting the accuracy of position measurements made with optical tracking systems, J. Motor Behaviriol, 22, 315 – 321.
5.
Jaitner, T., Mendoza,L., Schöllhorn,W.(2001) Analysis of the Long Jump Technique in the Transition From Approach to Takeoff Based on Time-continuous Kinematic Data, European Journal of Sport Science, vol. 1, issue 5
6.
Kejonen P, Kauranen K, Nrinimaa A, Vanharanta H. (2004) Velocities and accelerations of body parts during standing: association with visual information. Journal of sport rehabilitation, 13(1)
7.
Krosshaug,T., Nakamae,A.,Boden,B., Engebretsen,L., Smith,G., Slauterbeck, J.,Hewett,T.E., Bahr,R(2007) Estimating 3D joint kinematics from video sequences of
Meriç, B., Aydın, M. (2008). Hareket analizinde kullanılan görüntü sisteminin hassasiyetinin belirlenmesi.
Uluslararası İnsan Bilimleri Dergisi [Bağlantıda]. 5:1. Erişim: http://www.insanbilimleri.com
7
running and cutting maneuvers—assessing the accuracy of simple visual inspection Gait & Posture 26 (2007) 378–385
8.
Nicholls, R., Fleisig, G., Elliott, B., Lyman, S., Osinski, E. (2003) Accuracy of qualitative analysis for assessment of skilled baseball pitching technique. Sports Biomechanics 2, 213-226.
9.
Philip Graham-Smith, P.,Lees, A.( 2005)Three-dimensional kinematic analysis of the long jump take-off.Journal of Sports Sciences, 23(9): 891 – 903
10.
Poucelot, P., Audigie, F., Degueurce, C., Geiger, D., Denoix, J.M.(2000) A method to synchronize cameras using the direct linear transformation technique, Journal of Biomechanics.,33.: 1751-1754.
11.
Remondino,F (2006)Videogrammetry for human movement analysis ninth international symposium on the 3 D analysis human movement, 28-30 June, valenciennes, France
12.
Richards, J.(1999) The measurement of human motion: A comparison of commercially available systems, Human Movement Science, 18, 589 – 602.
13.
Scholz, J.(1989)Reliability and validity of the WATSMART three dimensional optoelectric motion analysis system, Physical Therapy., 69, 679 – 689
14.
Scholz, J.P.; Millford, J.P.(1993)Accuracy and precision of the PEAK Performance Technologies motion measurement system Journal of Motor Behavior Mar: Vol. 25 Issue 1. p. 2-7 6p.
15.
Shan, G.B., & Westerhoff, P.(2005)Full-body kinematic characteristics of the maximal instep soccer kick by male soccer players and parameters related to kick quality. Sports Biomechanics, 4(1): 59-72.
16.
Shapiro, R.(1978) Direct Linear Transformation method for three-dimensional cinematography. The research quarterly, 49 (2), 197- 205
17.
States,R.A., PappaS,E. (2006)Precision and repeatability of the Optotrak 3020 motion measurement system, Journal of Medical Engineering & Technology, Vol. 30, No. 1, Jan/Feb, 11 – 16
18.
Vander Linden, D., Carlson, S. and Hubbard, R.(1992) Reproducibility and accuracy of angle measurements obtained under static conditions with the motion analysis video system, Physical Therapy, 72,300 – 305

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