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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 3, Iss. 10 — Oct. 10, 2005
  • pp: 585–588

CCD camera automatic calibration technology and ellipse recognition algorithm

Changku Sun, Xiaodong Zhang, and Yunxia Qu  »View Author Affiliations

Chinese Optics Letters, Vol. 3, Issue 10, pp. 585-588 (2005)

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A novel two-dimensional (2D) pattern used in camera calibration is presented. With one feature circle located at the center, an array of circles is photo-etched on this pattern. An ellipse recognition algorithm is proposed to implement the acquisition of interest calibration points without human intervention. According to the circle arrangement of the pattern, the relation between three-dimensional (3D) and 2D coordinates of these points can be established automatically and accurately. These calibration points are computed for intrinsic parameters calibration of charge-coupled device (CCD) camera with Tsai method. A series of experiments have shown that the algorithm is robust and reliable with the calibration error less than 0.4 pixel. This new calibration pattern and ellipse recognition algorithm can be widely used in computer vision.

© 2005 Chinese Optics Letters

OCIS Codes
(100.2000) Image processing : Digital image processing
(100.5010) Image processing : Pattern recognition
(350.4600) Other areas of optics : Optical engineering

Changku Sun, Xiaodong Zhang, and Yunxia Qu, "CCD camera automatic calibration technology and ellipse recognition algorithm," Chin. Opt. Lett. 3, 585-588 (2005)

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