摘要
随着加工技术的快速发展,条纹投影三维测量在微小物体方向得以迅速发展,采用远心镜头已经成为条纹投影显微三维测量最重要的方法之一。然而,当使用基于单应性变换多平面标定法对远心相机进行标定时,无法直接获得相机外参的封闭解。在单应性变换平面标定法的基础上,对双远心三维测量系统提出了一种便捷的标定方法,能够直接获取远心相机的外部参数。通过建立2个间隔一定高度标定板平面之间的面内旋转和平移关系,能够得到标定板平面控制点的三维坐标信息,进而完成外参封闭解的求解。该标定方法仅需要借助一个可以在参考面上任意放置的标准测量块就能完成远心三维测量系统的标定,具有高灵活性和实用性。
With the rapid development of processing technology,fringe projection 3D measurement has developed rapidly in the direction of micro-scale objects,and the use of telecentric lenses has become one of the most important methods of microscopy fringe projection 3D measurement.However,when the multi-plane calibration method based on homography transformation is used to calibrate the telecentric camera,the closed solution of the camera extrinsic parameters cannot be directly obtained.Based on the homography transformation plane calibration method,this paper proposes a convenient calibration method for the bi-telecentric 3D measurement system,which can directly obtain the external parameters of the telecentric camera.By establishing the in-plane rotation and translation relationship between two calibration plate planes spaced at a certain height,the three-dimensional coordinate information of the control points of the calibration plate plane can be obtained,and then the solution of the external parameter closed solution can be calculated.The calibration method can complete the calibration of the telecentric three-dimensional measurement system with the help of a standard measurement block that can be placed arbitrarily on the reference plane,and has high flexibility and practicability.
作者
周鹏许
钟汇凯
伏燕军
桂程
钟声
ZHOU Pengxu;ZHONG Huikai;FU Yanjun;GUI Cheng;ZHONG Sheng(Key Laboratory of Nondestructive Testing,Ministry of Education,Nanchang Hangkong University,330063,Nanchang,PRC;School of Measuring and Optical Engineering,Nanchang Hangkong University,330063,Nanchang,PRC)
出处
《江西科学》
2022年第3期413-418,共6页
Jiangxi Science
基金
国家自然科学基金项目(61661034)
江西省自然科学基金重点项目(20202ACBL204011)
江西省重大学术和技术领军人才培养计划项目(20204bcj22010)
无损检测教育部重点实验室(南昌航空大学)基金资助项目
南昌航空大学江西省图像处理与模式识别重点实验室基金资助项目(ET201908399)
江西省青年科学基金资助项目(20202BABL212002)
江西省教育厅科技项目(gjj190509)。
关键词
微小物体
标定
三维重建
远心镜头
标准测量块
micro-scale object
calibration
3D measurement
telecentric lens
standard measurement block
