Multi-dimensional high-precision calibration method for line-scan camera

Guo-qin YUAN; Li-na ZHENG; Hong-wen ZHANG; Ya-lin DING; Jian-jun SUN; Chun-feng YU; Zhuang ZHANG

doi:10.3788/OPE.20192708.1901

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Multi-dimensional high-precision calibration method for line-scan camera

Information Sciences | 更新时间：2020-08-13

- Multi-dimensional high-precision calibration method for line-scan camera
- Optics and Precision Engineering Vol. 27, Issue 8, Pages: 1901-1907(2019)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所中国科学院航空光学成像与测量重点实验室，吉林长春 130033
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20192708.1901
  CLC： V447.3; TN942.2
- Received：12 January 2019，
  
  Accepted：25 February 2019，
  
  Published：15 August 2019
- 稿件说明：
移动端阅览
Guo-qin YUAN, Li-na ZHENG, Hong-wen ZHANG, et al. Multi-dimensional high-precision calibration method for line-scan camera[J]. Optics and precision engineering, 2019, 27(8): 1901-1907.
DOI：

Guo-qin YUAN, Li-na ZHENG, Hong-wen ZHANG, et al. Multi-dimensional high-precision calibration method for line-scan camera[J]. Optics and precision engineering, 2019, 27(8): 1901-1907. DOI： 10.3788/OPE.20192708.1901.

摘要

针对精密测角算法标定线阵相机内方位元素时仅标定一维方向的主点坐标及畸变，导致该标定算法适应性及精度受限的问题，提出了一种线阵相机二维高精度内方位标定方法。首先，分析了线阵相机内方位元素模型，然后，针对该模型提出了一种基于二维转台的二维标定方法，并给出了详细的标定步骤及数据处理方法，最后，将本文提出方法的标定结果与精密测角算法的标定结果进行了对比，结果表明，本文提出的标定方法的重投影误差为0.34 pixel，相比于精密测角算法的1.25 pixel，显著提高了标定精度，且标定时不需要进行对准、调平等操作，标定过程操作简单。

Abstract

In this study

to address the problem of limited adaptability and accuracy of the exact measuring angle method

which only calibrates the principal point and distortion in a one-dimensional direction with a line-scan camera

a two-dimensional high-precision calibration method for a line-scan camera was proposed. First

the inner orientation elements model of a line-scan camera was analyzed. Then

a two-dimensional calibration method based on a two-axis precise rotation stage was proposed for the model. Detailed calibration steps and data processing methods were also given. Finally

the calibration results of the proposed method were compared with those of the exact measuring angle method. The results show that the reprojection error of the calibration method proposed in this study is 0.34 pixels

which is a significant improvement in calibration precision when compared to the 1.25 pixels of the exact measuring angle method. The proposed calibration method does not require alignment

and the calibration process is simple.

关键词

Keywords

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