视觉测量误差的研究与讨论  

A Note on Measurement Errors of Vision Based Measurement System

作　　者：孙凤梅[1] 黄凤荣[2] 胡占义[2] 王卫宁[3] 

机构地区：[1]北方工业大学理学院,北京100041 [2]中国科学院自动化研究所模式识别国家重点实验室,北京100080 [3]首都师范大学物理系,北京100037

出　　处：《北方工业大学学报》2005年第1期61-63,56,共4页Journal of North China University of Technology

基　　金：中科院自动化研究所模式识别国家重点实验室开放课题资助项目

摘　　要：通过模拟实验研究发现,测量误差随着标定参照物与摄像机之间距离的增大,及标定参照物与被测量平面间距离的减小,呈现出先增加后减小的趋势,而在标定参照物靠近摄像机时的误差最小.研究还发现,在被测平面到摄像机的距离保持不变时,被测区域越大,测量误差越大.Based on extensive simulations, this short note shows that the measurement errors have the tendency to increase at first, then decrease with the increase of the distance from the camera to the calibration pattern, or in other words, with the decrease of the distance from the calibration pattern to the measurement plane. In addition, the resulting measurement errors are smaller when the calibration pattern is closer to the camera than those when the pattern is closer to the measurement plane. Besides, it is shown that when the distance from the camera to the measurement plane is fixed, the larger the measurement area on the plane is, the larger the degree of measurement errors will be. The above results could serve as a theoretical guidance in real vision based measurement applications.

关 键 词：视觉测量 测量误差 标定 

分 类 号：TP242.62[自动化与计算机技术—检测技术与自动化装置]