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Robust calibration method for microscopic vision systems

机译：显微视觉系统的鲁棒标定方法

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摘要

In order to improve the stability of the calibration method based on a single parallel plane, we propose a robust calibration method based on the calculation of traditional homography matrix and Gaussian imaging model. This method first uses a convenient and accurate method to calculate the physical focal length of the entire microscope optical system, and then uses the Gaussian imaging model to calculate the effective focal length and intrinsic matrix of the camera. Then, the camera's extrinsic parameters can be easily calculated from the homography matrix. Finally, all camera parameters can be optimized along with the lens distortion through a nonlinear optimization process. In this method, only two images of the parallel calibration plate need to be captured to complete the calibration. The proposed method overcomes the problem of instability of the existing microscope calibration methods and significantly improves the robustness and accuracy of the whole calibration process.
机译：为了提高基于单个平行平面的标定方法的稳定性，提出了一种基于传统单应矩阵和高斯成像模型计算的鲁棒标定方法。该方法首先使用一种方便且准确的方法来计算整个显微镜光学系统的物理焦距，然后使用高斯成像模型来计算相机的有效焦距和本征矩阵。然后，可以很容易地从单应性矩阵中计算出相机的外部参数。最后，可以通过非线性优化过程优化所有相机参数以及镜头畸变。在这种方法中，只需捕获平行校准板的两个图像即可完成校准。该方法克服了现有显微镜标定方法不稳定的问题，大大提高了整个标定过程的鲁棒性和准确性。

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  • 来源
    《Optical engineering》 |2019年第1期|014108.1-014108.8|共8页
  • 作者

    Li Rao; Feipeng Da;

  • 作者单位

    Southeast University, School of Automation, Nanjing, Jiangsu, China,Ministry of Education, Key Laboratory of Measurement and Control of Complex Systems of Engineering, Nanjing, China;

    Southeast University, School of Automation, Nanjing, Jiangsu, China,Ministry of Education, Key Laboratory of Measurement and Control of Complex Systems of Engineering, Nanjing, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    camera calibration; microscopy; Gaussian imaging model; image magnification;

    机译：相机校准;显微镜高斯成像模型;图像放大;

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