基于光束法平差的双线阵系统标定技术  

Calibration Technique for Bilinear Array System Based on Beam Adjustment

作　　者：郭迎超 王国珲[1] GUO Yingchao;WANG Guohui(Xi'an Technological University,Xi'an 710021,China)

机构地区：[1]西安工业大学光电工程学院,西安710021

出　　处：《计算机测量与控制》2024年第2期256-261,267,共7页Computer Measurement &Control

基　　金：陕西省教育厅科学研究计划项目(22JY025)。

摘　　要：针对线阵相机特殊使用场景中所需要的高精度图像,对线阵相机进行高精度标定;提出一种基于光束法平差的双线阵相机标定方法;通过背景差分法获取线阵相机的特征点的像素坐标;再利用已有的直接线性变换方法和非线性优化方法求出相机的内参、外参及畸变参数后,将得到的初始参数与世界坐标作为待优化集合,利用LM法和光束法平差对该集合进行更进一步的优化,使得双线阵系统的重投影误差降到最低;实验表明,该方法与传统的线阵相机标定方法相比重投影误差降低了75.01%。Aiming at the high precision image needed in the special application scene of linear array camera,the linear array camera is calibrated with high precision.A calibration method for bilinear array cameras based on beam adjustment is proposed.The pixel coordinates of feature points of linear array camera are obtained by the background difference method.The existing direct linear transformation and nonlinear optimization methods are used to obtain the internal parameters,external parameters and distortion parameters of the camera,and the initial parameters and world coordinates are taken as the set to be optimized.The LM and beam adjustment methods are used to further optimize the set,so that the reprojection error of the bilinear array system is minimized.The experimental results show that compared with the traditional linear array camera calibration method,the reprojection error of the proposed method reduces 75.01%.

关 键 词：线阵相机 视觉标定 光束法平差 重投影误差 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]