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Algorithms 2016, 9(2), 31; doi:10.3390/a9020031

Improved Direct Linear Transformation for Parameter Decoupling in Camera Calibration

1
School of Electrical Engineering and Automation, Harbin Institute of Technology, Heilongjiang 150001, China
2
Capital Aerospace Machinery Company, Beijing 100076, China
*
Author to whom correspondence should be addressed.
Academic Editor: Faisal N. Abu-Khzam
Received: 11 December 2015 / Revised: 20 April 2016 / Accepted: 25 April 2016 / Published: 29 April 2016
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Abstract

For camera calibration based on direct linear transformation (DLT), the camera’s intrinsic and extrinsic parameters are simultaneously calibrated, which may cause coupling errors in the parameters and affect the calibration parameter accuracy. In this paper, we propose an improved direct linear transformation (IDLT) algorithm for calibration parameter decoupling. This algorithm uses a linear relationship of calibration parameter errors and obtains calibration parameters by moving a three-dimensional template. Simulation experiments were conducted to compare the calibration accuracy of DLT and IDLT algorithms with image noise and distortion. The results show that the IDLT algorithm calibration parameters achieve higher accuracy because the algorithm removes the coupling errors. View Full-Text
Keywords: camera calibration; direct linear transformation; parameter decoupling camera calibration; direct linear transformation; parameter decoupling
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhao, Z.; Ye, D.; Zhang, X.; Chen, G.; Zhang, B. Improved Direct Linear Transformation for Parameter Decoupling in Camera Calibration. Algorithms 2016, 9, 31.

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