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Shi, C., Qiu, B., Wu, C., et al. (2006) Normal-Temperature Fog Machinery Spray Angle Measuring System Based on Machine Vision. Transactions of the Chinese Society for Agricultural Machinery, 37, 47-50.

has been cited by the following article:

• TITLE: Measurement System of Circler Diameter

  AUTHORS: Shangkun Yang

  KEYWORDS: Zernike Moment, Sub-Pixel, Edge Detection, Measurement of Outer Diameter

  JOURNAL NAME: Open Access Library Journal, Vol.5 No.4, April 29, 2018

  ABSTRACT: Sub-pixel measurement system can, to some extent, compensate the margin positioning error caused by hardware limitation. A kind of sub-pixel measurement system of circle outer diameter based on Zernike moment is established. Sub-pixel edge detection algorithm of circular workpiece based on Zernike moment is proposed and further positioning of edge points in the gradient direction by the adoption of quadratic polynomial interpolation is conducted. Finally, circle outer diameter measurements of sub-pixel accuracy are obtained by using least square method fitting the edge points. The experiment results show that the measurement accuracy of system is high, which meets the requirement of high accuracy measurement of circular workpiece.