Zoom Camera Self-calibration Method Based on Two Vanishing Points(PD)
[1]Zhao Shujun,Duan Shaoli,Zhang Xiaofang,et al.Zoom Camera Self-calibration Method Based on Two Vanishing Points(PD)[J].Journal of Zhengzhou University (Engineering Science),2016,37(05):91-96.[doi:10.13705/j.issn.1671-6833.2016.05.018]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
37
Number of periods:
2016 05
Page number:
91-96
Column:
Public date:
2016-11-25
- Title:
- Zoom Camera Self-calibration Method Based on Two Vanishing Points(PD)
- Keywords:
- Zoom camera calibration; Two vanishing point; Sub-pixel comer detection; Zoom center; The optical center displacement
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2016.05.018
- Abstract:
- The calibration method of the zoom camera is studied. The self-calibration method based on the two vanishing points is used to calibrate the general parameters of the zoom camera under two fixed focal lengths. By comparing with Zhang Zhengyou’s calibration method and the results of the machine vision software Halcon calibration, the results are verified. The feasibility and robustness of this method are verified. In order to better reflect the zoom characteristics of the zoom camera, a thick lens model that can more accurately describe the zoom camera is established. The author performs SIFT feature matching on the zoom image, and according to the matching point pair The linear equations are established, and the least square method is used to estimate the zoom center of the zoom image. In addition, the optical center displacement between different focal lengths is also calculated. The experimental results show that there is an obvious gap between the optical center displacement and the focal length, which shows that The thick lens model is more suitable for describing the zoom lens of the camera.
- References:
- -
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