Method of rotation angle measurement in machine vision based on calibration pattern with spot array

Weimin, Li; Jing, Jin; Xiaofeng, Li; Bin, Li

doi:10.1364/AO.49.001001

Title: Method of rotation angle measurement in machine vision based on calibration pattern with spot array

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Abstract

We propose a method of rotation angle measurement with high precision in machine vision. An area scan CCD camera, imaging lens, and calibration pattern with a spot array make up the measurement device for measuring the rotation angle. The calibration pattern with a spot array is installed at the rotation part, and the CCD camera is set at a certain distance from the rotation components. The coordinates of the spots on the calibration pattern is acquired through the vision image of the calibration pattern captured by the CCD camera. At the initial position of the calibration pattern, the camera is calibrated with the spot array; the mathematical model of distortion error of the CCD camera is built. With the equation of coordinate rotation measurement, the rotation angle of the spot array is detected. In the theoretic simulation, noise of different levels is added to the coordinates of the spot array. The experiment results show that the measurement device can measure the rotation angle precisely with a noncontact method. The standard deviation of rotation angle measurement is smaller than 3 arc sec. The measurement device can measure both microangles and large angles.

Authors:: Weimin, Li; Jing, Jin; Xiaofeng, Li; Bin, Li

Publication Date:: Sat Feb 20 00:00:00 EST 2010

OSTI Identifier:: 22036445

Resource Type:: Journal Article

Journal Name:: Applied Optics

Additional Journal Information:: Journal Volume: 49; Journal Issue: 6; Other Information: (c) 2010 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6935

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; CALIBRATION; CHARGE-COUPLED DEVICES; COORDINATES; EQUATIONS; ERRORS; IMAGES; LENSES; MATHEMATICAL MODELS; NOISE; ROTATION; SIMULATION

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                    Weimin, Li, Jing, Jin, Xiaofeng, Li, and Bin, Li. Method of rotation angle measurement in machine vision based on calibration pattern with spot array.  United States: N. p., 2010. 
        Web.  doi:10.1364/AO.49.001001.

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                    Weimin, Li, Jing, Jin, Xiaofeng, Li, & Bin, Li. Method of rotation angle measurement in machine vision based on calibration pattern with spot array.  United States.  https://doi.org/10.1364/AO.49.001001

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                    Weimin, Li, Jing, Jin, Xiaofeng, Li, and Bin, Li. 2010.  
        "Method of rotation angle measurement in machine vision based on calibration pattern with spot array".  United States.  https://doi.org/10.1364/AO.49.001001.

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@article{osti_22036445,

  title        = {Method of rotation angle measurement in machine vision based on calibration pattern with spot array},

  author       = {Weimin, Li and Jing, Jin and Xiaofeng, Li and Bin, Li},

  abstractNote = {We propose a method of rotation angle measurement with high precision in machine vision. An area scan CCD camera, imaging lens, and calibration pattern with a spot array make up the measurement device for measuring the rotation angle. The calibration pattern with a spot array is installed at the rotation part, and the CCD camera is set at a certain distance from the rotation components. The coordinates of the spots on the calibration pattern is acquired through the vision image of the calibration pattern captured by the CCD camera. At the initial position of the calibration pattern, the camera is calibrated with the spot array; the mathematical model of distortion error of the CCD camera is built. With the equation of coordinate rotation measurement, the rotation angle of the spot array is detected. In the theoretic simulation, noise of different levels is added to the coordinates of the spot array. The experiment results show that the measurement device can measure the rotation angle precisely with a noncontact method. The standard deviation of rotation angle measurement is smaller than 3 arc sec. The measurement device can measure both microangles and large angles.},

  doi          = {10.1364/AO.49.001001},

  url          = {https://www.osti.gov/biblio/22036445},
  journal      = {Applied Optics},

  issn         = {0003-6935},

  number       = 6,

  volume       = 49,

  place        = {United States},

  year         = {Sat Feb 20 00:00:00 EST 2010},

  month        = {Sat Feb 20 00:00:00 EST 2010}

}

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