Rotation volume measurement method based on CT sequence images

Zou Yongning; Wu Lifen; Wang Jue; Duan Weiwei

doi:10.3788/HPLPB20132509.2423

Volume 25 Issue 09

Jul. 2013

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Abstract

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(09): 2423-2428

Wu Wuming, Wu Huiyun, Wu Yi, et al. Analysis of atmosphere turbulence optical parameter[J]. High Power Laser and Particle Beams, 2012, 24: 2022-2026. doi: 10.3788/HPLPB20122409.2022

Citation:

Zou Yongning, Wu Lifen, Wang Jue, et al. Rotation volume measurement method based on CT sequence images[J]. High Power Laser and Particle Beams, 2013, 25: 2423-2428. doi: 10.3788/HPLPB20132509.2423

Wu Wuming, Wu Huiyun, Wu Yi, et al. Analysis of atmosphere turbulence optical parameter[J]. High Power Laser and Particle Beams, 2012, 24: 2022-2026. doi: 10.3788/HPLPB20122409.2022

Citation:

Zou Yongning, Wu Lifen, Wang Jue, et al. Rotation volume measurement method based on CT sequence images[J]. High Power Laser and Particle Beams, 2013, 25: 2423-2428. doi: 10.3788/HPLPB20132509.2423

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Rotation volume measurement method based on CT sequence images

doi: 10.3788/HPLPB20132509.2423

1.
ICT Research Center,Key Laboratory of Optoelectronic Technology and System of the Ministry of Education,Chongqing University,Chongqing 400044,China;
2.
College of Automation,Chongqing University,Chongqing 400044,China

Received Date: 2012-12-24
Rev Recd Date: 2013-04-22
Publish Date: 2013-07-17

Abstract

Abstract

According to the common engineering workpiece with dramatic axial contour changes, a high-accuracy inter slice contour rotating integral volume measuring algorithm of Zernike moment sub-pixel edge detection is presented. Firstly, a sub-pixel level contour is detected by Zernike moment method. Secondly, using the polynomial fitting method the contour is fitted, and then the fitted contour is sampled by the same angle interval. Each edge point at the same phase angle of each slice is used to fit the contour, and then the apex of work-piece is calculated through extrapolation method. Finally, each fitted contour is rotated through one phase angle interval to calculate the integral as a rotation volume, the volume of each rotation is accumulated to be the total volume of the workpiece. Volumetric measurement experiments are carried out towards three volume-equal testing workpieces. The results indicate that the measurement errors are less than 0.7% using the proposed method. An actual work-piece with internal cavity is measured. The result indicates that the measurement accuracy of the proposed method is 1.5 times than the one of the Canny-frustum method.
- CT,
- volume measurement,
- sub-pixel,
- rotating integral,
- internal cavity volume

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