Surface reconstruction based on the camera relative irradiance

Surface reconstruction based on the camera relative irradiance
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基于相机相对辐照度的表面重建

DOI:
10.1177/1550147718759566
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发表时间:
2018-02
影响因子:
2.3
通讯作者:
Xincheng Cao
Xincheng Cao
中科院分区:
计算机科学4区
文献类型:
--
作者:
Bin yao;Weifang Sun;Binqiang Chen;Tianxiang Zhou;Xincheng Cao

文献摘要

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表面的精确三维测量在许多领域中是重要的。通常,物体表面的三维描述必须通过接触式测量探头或其他非接触设备来获取。提出了一种利用固定环形光下图像灰度值信息,利用摄像机相对照度进行曲面重建的新方法。在校准测量条件之后,仅需要物体的一个图像来重建表面。该方法主要包括两个方面:标定过程和曲面重建过程。标定过程的目的是找出不同曝光条件下图像灰度值与电荷耦合器件传感器相对辐照度之间的关系。曲面重建主要研究了光照度与高度信息之间的关系。实验结果表明,用电荷耦合器件相机测量的照度相对误差小于2.91%。重建误差主要来自于算法计算的截断误差。最后通过一个实例验证了该方法的有效性。重建实验表明,它可以成功地从指定的角度测量的对象的几何特征。
Precise three-dimensional measurements of surfaces are significant in many fields. Usually, three-dimensional descriptions of the object surface have to be acquired by contact measure probe or other non-contact equipment. The paper proposed a novel surface reconstruction method that uses camera relative irradiance via the image gray-scale value information under fixed ring light. After calibrations of the measurement condition, just one image of the object is necessary to reconstruct the surface. The method mainly involves two aspects: the calibration process and the surface reconstruction process. The purpose of the calibration process is to find the relation between the image gray-scale value and the relative irradiance of the charge-coupled device sensor in different expose conditions. The surface reconstruction mainly focuses on the relation between the irradiance and height information. The experiment result shows the relative error of the illumination measurement result obtained using charge-coupled device camera is less than 2.91%. Reconstruction error is mainly result from the truncation error of algorithm calculation. An example is presented to verify the performance of this technique. The reconstruction experiments demonstrated that it can successfully measure the geometrical characteristics from the specified view of the object.
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