双目显微立体视觉系统标定方法研究  

Research on binocular micro stereovision system calibration method

作　　者：李景辉[1] 徐征[2] 刘冲[1] 陈莉[2] 

机构地区：[1]大连理工大学微系统研究中心,辽宁大连116024 [2]大连理工大学精密与特种加工教育部重点实验室,辽宁大连116024

出　　处：《传感器与微系统》2008年第1期105-108,111,共5页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(50275023)

摘　　要：针对显微立体视觉系统光路标定问题,设计并实现一种适合显微立体视觉系统的两步标定方法。首先,对单子光路进行初步的标定,获得放大倍率;然后,以光学工作距离为定值约束,求解内参数;再进行第二步标定求解外参数。对3个常用物镜倍率的体视显微镜进行了标定,获得了双光路的焦距、相对位置、倍率等参数的均值、标准差与相对误差,并用左右位移相对平移偏差验证了标定的准确性。研究的显微立体视觉系统标定方法为分析微沟道的半遮挡问题奠定了实验基础。A new two-step calibration method for micro stereovision optical paths is presented and achieved. For one optical path of stereo light microscope （SLM）, the intrinsic parameters can be calculated by the constraint of constant optical operating distance and the magnification obtained from the elementary calibration; Extrinsic parameters can be calibrated from the second step. The average, standard deviation and the relative error of focal length, relative position and magnification of binocular system are gained by the calibration of the SLM under three common-used objective lens magnifications. The accuracy of the calibration is validated by the relative deviation between left and right translation vectors. The calibration method is effective for the micro stereovision system and contributes to an experimental foundation for the analysis of micro channel half-occlusion.

关 键 词：体视显微镜 显微立体视觉 标定 双目视觉 半遮挡 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]