镜面物体三维测量系统中两显示屏的平行正对校正

发布时间：2018-04-18 21:23

本文选题：三维形貌测量 + 镜面测量　；参考：《光学精密工程》2017年02期

【摘要】：针对镜面物体三维测量系统中两显示屏无法精确平行正对的问题,提出了一种在镜面物体三维测量系统中通过软件产生变形条纹等效两显示屏精确平行正对的方法。该方法首先采用机器视觉技术标定两显示屏的外参。然后基于所标定的外参,利用软件编程产生等效两显示屏平行正对的变形条纹,变形条纹通过半透半反镜后所成的像在相机坐标系内呈现前后精确平行正对的关系。最后,利用对应两个显示屏上的变形条纹计算相应位置相位的差值,并通过均方根误差定量评定所提出的方法。实验结果表明,所提出的方法能将水平方向的均方根误差缩减为原来的24.21%,竖直方向的均方根误差缩减为原来的8.15%,从而提高三维测量系统的精度。
[Abstract]:In order to solve the problem that two display screens can not be accurately paralleled in the 3D measurement system of mirror object, a method of generating the exact parallel alignment of the two display screens by software in the 3D measurement system of mirror object is presented in this paper.This method first uses machine vision technology to calibrate the external parameters of two display screens.Then, based on the calibrated outer parameters, the deformation fringes of the parallel positive pairs of the equivalent two display screens are generated by software programming. The images formed by the deformation fringes passing through the semi-transparent and semi-reflective mirrors present the relation of the exact parallel positive pairs in the camera coordinate system.Finally, the phase difference of the corresponding position is calculated by using the deformation fringes corresponding to the two display screens, and the proposed method is evaluated quantitatively by the root mean square error (RMS).The experimental results show that the proposed method can reduce the root mean square error in horizontal direction to 24.21 in the horizontal direction and 8.15 in the vertical direction, thus improving the accuracy of the three-dimensional measurement system.
【作者单位】：河北工业大学机械工程学院;
【基金】：国家自然科学基金资助项目(No.51675160,No.61171048) 河北省应用基础研究计划重点基础研究资助项目(No.15961701D) 河北省高层次人才资助项目(No.GCC2014049) 河北省人才工程培养经费资助项目(No.A201500503) 天津市科技计划项目(No.15PTSYJC00260)
【分类号】：TP391.41

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