Three-dimensional depth segmentation technique utilizing discontinuities of wrapped phase sequence

Ji DENG; Jian LI; Hao FENG; Zhou-mo ZENG

doi:10.3788/OPE.20192711.2459

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Three-dimensional depth segmentation technique utilizing discontinuities of wrapped phase sequence

Information Sciences | 更新时间：2020-08-13

- Three-dimensional depth segmentation technique utilizing discontinuities of wrapped phase sequence
- Optics and Precision Engineering Vol. 27, Issue 11, Pages: 2459-2466(2019)
- 作者机构：
  
  天津大学精密测试技术及仪器国家重点实验室，天津 300072
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20192711.2459
  CLC： TP391; TH741
- Received：03 December 2018，
  
  Accepted：02 February 2019，
  
  Published：15 November 2019
- 稿件说明：
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Ji DENG, Jian LI, Hao FENG, et al. Three-dimensional depth segmentation technique utilizing discontinuities of wrapped phase sequence[J]. Optics and precision engineering, 2019, 27(11): 2459-2466.
DOI：

Ji DENG, Jian LI, Hao FENG, et al. Three-dimensional depth segmentation technique utilizing discontinuities of wrapped phase sequence[J]. Optics and precision engineering, 2019, 27(11): 2459-2466. DOI： 10.3788/OPE.20192711.2459.

摘要

本文提出了一种简易的三维深度分割技术，该技术能够对存在突变表面的物体的不同深度区域进行分割。为实现该项技术，首先需要搭建由投影仪、相机和物体组成的深度分割平台。由投影仪向被分割物体投射一系列相移数字光栅；数字光栅经物体表面调制，被相机采集并存入计算机中待后续处理。将所采集的序列数字光栅进行顺序置换操作，依次获得三种序列的数字光栅组，通过最小二乘法对不同序列光栅组进行解相位并因此得到包裹相位组。包裹相位组经差分与相交运算后，可获得相交边缘；对相交边缘进行图像增强操作后即可对不同三维深度的不连续区域进行分割。仿真结果表明，对于900 pixel×900 pixel范围的复杂面型，该算法的分割偏移误差仅为2 pixel。实验结果表明：该技术能够对多个不同深度的相似颜色物体进行精确的分割。因此，本方法具备低消耗，高精度三维深度分割的能力。

Abstract

To segment objects with abrupt change surface positioned at different depth

this paper presented a flexible technique for 3D depth segmentation. The system consisted of one projector

one camera

and the objects for segmentation. The first step was to establish the system for segmentation. The second step was to cast the phase-shifted gratings onto the object surface. The gratings

which were modulated by the 3D information of the objects

were then captured by the camera and sent to the computer for further processing. The wrapped phase sequence could then be calculated by changing the sequence of the phase-shifted patterns and using the least squares algorithm. By applying the neighbor pixel difference algorithm to the wrapped phase maps

the edges for segmentation could be retrieved further. Finally

these edges could be optimized and sent for segmentation. The simulation result shows that the method can effectively segment the complex objects with size 900 × 900 pixels

with the corresponding error reaching only two pixels. The experimental result shows that the approach can segment objects with similar color precisely. The proposed method has the advantages of low cost

high precision

and can perform the task of 3D depth segmentation.

关键词

Keywords

references

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