Single frame coaxial 3D measurement using depth from defocus of projection system
Single frame coaxial 3D measurement using depth from defocus of projection system
复制标题
使用投影系统散焦深度进行单帧同轴 3D 测量
DOI：
10.1117/12.907675
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Shigeru Ando
中科院分区：
文献类型：
--
作者：
Toru Kuriahra;Shigeru Ando
本文提出了一种基于散焦深度的三维轮廓术，该方法是基于同轴线的投影系统。在该系统中，由DLP光指挥员产生的条纹图案被投影到物体上，它在物体表面上移动，产生光强的时间变化。投影的条纹图案根据其与焦平面的距离而散焦。通过移动条纹图案，通过时频分析获取散焦的空间频率分量。我们使用相关图像传感器(CIS)来捕捉单帧图像中的时频分量。CIS输出每一帧中每个像素的入射光的傅里叶系数，因此它可以进行单帧3D测量。评价实验表明，投影散焦依赖于距焦平面的距离，可以用于三维测量。
We propose 3D profilometry based on depth from defocus of the projection system with the same axis of imaging system. In this system, the stripe pattern generated by DLP Light commander is projected on the object, and it moves on object's surface generating temporal variation of the light intensity. The projected stripe pattern is defocused depending on its distance from the focal plane. By moving the stripe pattern, defocused spatial frequency component is captured by temporal frequency analysis. We use correlation image sensor (CIS) to capture the temporal frequency component in a single frame. CIS outputs the Fourier coefficients of incident light in each pixel for every frames, and therefore it enables single frame 3D measurement. Evaluation experiments show that projection defocus depends on the distance from the focal plane, and it can be used for 3D measurement.