几种经典相机标定方法的精度分析

Accuracy Analysis of Several Typical Camera Calibration Methods

相机标定技术已在砚觉测量领域被广泛应用，但是在具体的工程实践中还没有一个明确的标准来判断不同标定方法的精度及其适用的场景和条件。本文针对几种经典相机标定方法，分析影响其标定结果的各种可能因素，通过实验验证获得了DLT、张氏标定法以及两步标定法的最优标定精度，并构建了各主要影响因素对每一种标定方法结果的影响曲线，为相关工程作业的实施提供了参考依据。

Camera calibration technique has been widely used in vision measurement. However, there is no definite standard to judge the accuracy and applicable scenarios or conditions of each method in practice. In this paper, some factors that may influence the results of typical calibration methods are analyzed. The optimal precision of DLT method, Zhang＇s calibration method and two - step method are obtained through some experiments. A curve is drawn to display the influence of each major factor on every calibration result, which will provide reference for related engineering work.