Cross-point calibration method for the Scheimpflug measurement system.

The Scheimpflug measurement system has broad application prospects in the fields of tomographic particle image velocimetry (PIV), ophthalmology, and three-dimensional reconstruction. Additionally, its special imaging structure makes the theoretical model of other traditional calibration methods no longer applicable. A cross-point calibration method in which the real-world coordinate system is transferred from an in-kind calibrator to displacement, achieving great improvements in the quantity and accuracy of the feature points, is proposed. This method, which makes up for the defects introduced by the distorted imaging plane, also in turn simplifies the calibration process. Finally, the proposed method is tested via both simulation and calibration experiments. The high calibration accuracy verifies that the method is feasible.

[1]  Frédéric Champagnat,et al.  Another look at volume self-calibration: calibration and self-calibration within a pinhole model of Scheimpflug cameras , 2016 .

[2]  Sanjay V. Patel,et al.  Determining Subclinical Edema in Fuchs Endothelial Corneal Dystrophy: Revised Classification using Scheimpflug Tomography for Preoperative Assessment. , 2019, Ophthalmology.

[3]  Yigang Cen,et al.  Calibration method for a line-structured light vision sensor based on a single cylindrical target. , 2020, Applied optics.

[4]  Youping Chen,et al.  A flexible and high precision calibration method for the structured light vision system , 2016 .

[5]  Xiang Peng,et al.  Distortion correction for microscopic fringe projection system with Scheimpflug telecentric lens. , 2015, Applied optics.

[6]  Hui Lin,et al.  Structure light telecentric stereoscopic vision 3D measurement system based on Scheimpflug condition , 2016 .

[7]  Pascal Monasse,et al.  A Precision Analysis of Camera Distortion Models , 2017, IEEE Trans. Image Process..

[8]  Haibo Liu,et al.  Review of Calibration Methods for Scheimpflug Camera , 2018, J. Sensors.

[9]  Herbert Gross,et al.  Improvement of Scheimpflug systems with freeform surfaces. , 2018, Applied optics.

[10]  Guangjun Zhang,et al.  A novel 1D target-based calibration method with unknown orientation for structured light vision sensor , 2010 .

[11]  Zong Zhi-jian,et al.  Accurate extrinsic calibration method of line structured-light sensor based on standard ball , 2009, 2009 IEEE International Workshop on Imaging Systems and Techniques.

[12]  Zhen Liu,et al.  Calibration method for line-structured light vision sensor based on a single ball target , 2015 .

[13]  Qiang Gao,et al.  Laser stripe extraction method in industrial environments utilizing self-adaptive convolution technique. , 2017, Applied optics.

[14]  Chao Zheng,et al.  Analysis and simplification of lens distortion model for the scheimpflug imaging system calibration , 2019 .

[15]  Yong Zhang,et al.  Improved 3D reconstruction method based on the Scheimpflug principle , 2020 .

[16]  Ping Zhou,et al.  A two-step calibration method of lenslet-based light field cameras , 2019 .

[17]  Ahmed Elsheikh,et al.  Integration of Scheimpflug-Based Corneal Tomography and Biomechanical Assessments for Enhancing Ectasia Detection. , 2017, Journal of refractive surgery.

[18]  Mingwei Shao,et al.  Sphere-based calibration method for trinocular vision sensor , 2017 .

[19]  Srikumar Ramalingam,et al.  A Unifying Model for Camera Calibration , 2017, IEEE Transactions on Pattern Analysis and Machine Intelligence.