双目视觉系统测量精度分析  

Accuracy Analysis of Binocular Vision System

作　　者：肖志涛[1] 张文寅 耿磊[1] 张芳[1] 吴骏[1] 

机构地区：[1]天津工业大学电子与信息工程学院,天津300387

出　　处：《光电工程》2014年第2期6-11,共6页Opto-Electronic Engineering

基　　金：国家自然基金项目(61102150);天津市科技支撑计划重点项目(13ZCZDGX02100)

摘　　要：针对双目视觉系统测量精度的问题,本文提出并建立了双目视觉系统误差分析模型,分析了摄像机标定精度、镜头参数及系统结构参数对系统测量精度的影响,并结合实验证明了理论的正确性。实验表明,在标定板均匀分布于具有较大深度范围系统的整个可视区域时,增加标定图像数目能有效提高系统精度;在保证系统有效视场的前提下,增大基线距能有效的提高系统测量精度;相机光轴与基线夹角在[55o^70o]取值时,系统测量精度较高。To improve the measurement accuracy of the binocular vision system, the binocular vision system error model is established. Meanwhile, the influence of camera calibration accuracy and the lens parameters and structural parameters of vision system on system accuracy are analyzed. And the rationality of the theoretical analysis is verified by experiment. The experiment results show that, when placing calibration targets at the different depths relative to the camera of the entire field of view, the system accuracy can be improved effectively by increasing the number of calibration image. The system error can be reduced by increasing the baseline distance in the premise of effective field of view. And the system has higher measurement accuracy while the angle values between the baseline and the optic axial range from 55o to 70o.

关 键 词：双目视觉 误差分析 摄像机标定 镜头景深 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]