Pixelwise Phase Unwrapping Based on Ordered Periods Phase Shift
Pixelwise Phase Unwrapping Based on Ordered Periods Phase Shift
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DOI：
10.3390/s19020377
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发表时间：
2019-01-02
期刊：
影响因子：
3.9
通讯作者：
Ishikawa, Masatoshi
中科院分区：
文献类型：
--
作者：
Tabata, Satoshi;Maruyama, Michika;Ishikawa, Masatoshi
现有的相移方法在实现运动物体的高速、高精度、高分辨率、实时形状测量方面是有效的，但还没有建立一种能够处理真实环境中目标物体的运动并且对全局光照具有鲁棒性的相位展开方法。因此，本文提出了一种稳健的、高精度的确定绝对相位的方法，该方法只需三个步骤。在该方法中，引入了一种按正弦波的每个周期重新排列投影方向图的顺序结构，从而将相位展开问题归结为计算方向图的阶数。通过仿真实验证明，该方法即使在物体运动速度较快且存在全局光照的情况下，也能实现高速、高精度、高分辨率的三维形状测量。在本研究中，实验测量系统配置了高速摄像机和投影仪，进行了实时测量，处理时间为1.05ms，吞吐量为500fps。
The existing phase-shift methods are effective in achieving high-speed, high-precision, high-resolution, real-time shape measurement of moving objects; however, a phase-unwrapping method that can handle the motion of target objects in a real environment and is robust against global illumination as well is yet to be established. Accordingly, a robust and highly accurate method for determining the absolute phase, using a minimum of three steps, is proposed in this study. In this proposed method, an order structure that rearranges the projection pattern for each period of the sine wave is introduced, so that solving the phase unwrapping problem comes down to calculating the pattern order. Using simulation experiments, it has been confirmed that the proposed method can be used in high-speed, high-precision, high-resolution, three-dimensional shape measurements even in situations with high-speed moving objects and presence of global illumination. In this study, an experimental measurement system was configured with a high-speed camera and projector, and real-time measurements were performed with a processing time of 1.05 ms and a throughput of 500 fps.