图像中心点预标定方法研究与应用

Application and Research on Pre-Calibration of Image Center

在应用视觉测量系统中,视觉传感器即CCD摄像机的标定是必要的步骤。目前大部分标定算法都需要事先给出图像中心点,文中讨论该参数的求取方法。介绍了目前几种常用的图像中心的标定方法,有重点地介绍了各种方法的原理和实现流程,对其实现原理的复杂性、实验仪器的精密性、操作方法的难易度进行了综合比较,最后给出相应的实验结果及其结论。对各种视觉测量系统及摄像机标定精度要求不同的场合,可以根据其实验条件及要求选取最合适的方法进行图像中心点的求取。

Calibration is a necessary step before applying photics sensor in measurement system. Recently most methods of camera calibration need to take the image center as a known parameter ahead. This paper discussed several common methods to get the parameter, and introduced theories and how to implement them emphasized their principles and realization flow, compared comprehensively the complexity of the principle, the precision of experiment instrument, the degree of difficulty of the operation methods, finally gave the results and conclusion. In terms of diverse vision measurement systems and CCD camera calibration occasions requiring different precision, regarding to the experiment condition and requirement, can choose a most feasible method to get the image center.