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- Title
Vision testing method for diameter, roundness and hardness of table tennis ball.
- Authors
QIU Zu-rong; LU Yao-huan; XUE Jie; PANG Jiang-miao; LI Hao-peng
- Abstract
Under the premise of fully respecting current national standard of table tennis ball,this paper presents an integrated and effective method for testing diameter,roundness and hardness of table tennis ball based on vision measurement. Firstly, camera calibration is performed by 40 mm gauge block to capture the images of table tennis ball in static and pressed state in an appropriate lighting condition. Then image binarization and extraction of image contour are carried out. The least square method is used to fit its center. Finally,the diameter, roundness and hardness are calculated. The measurement data are analyzed by using the method presented in this paper for table tennis ball with known parameter data and with unknown parameter data. Experimental results show that this method can improve measurement accuracy and provide a technical basis for the online testing and integration measurement of table tennis ball.
- Subjects
TENNIS balls; TABLE tennis; VISION testing; TEST methods; CAMERA calibration; VISION
- Publication
Journal of Measurement Science & Instrumentation, 2019, Issue 1, p1
- ISSN
1674-8042
- Publication type
Article
- DOI
10.3969/j.issn.1674-8042.2019.01.001