Fast Multi-Line Structured Light Measurement Method Integrated with Region Matching

Qunhong Lin; Ju Zhang; Kaiyong Jiang; Junyi Lin

doi:10.3788/LOP212748

Laser & Optoelectronics Progress, Volume. 60, Issue 1, 0112003(2023)

Fast Multi-Line Structured Light Measurement Method Integrated with Region Matching

Qunhong Lin^1,2, Ju Zhang^1,2, Kaiyong Jiang^1,2, and Junyi Lin^1,2、*

Author Affiliations

¹Xiamen Key Laboratory of Digital Vision Measurement, Huaqiao University, Xiamen 361021, Fujian , China

²Fujian Provincial Key Laboratory of Special Energy Manufacturing, Huaqiao University, Xiamen 361021, Fujian , China

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Figures & Tables(11)

Fig. 1. Flow chart of multi-line structured light measurement method

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Fig. 2. Diagram of local resolution enhancement

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Fig. 3. Schematic diagram of DIC stereo matching. (a) Left and right images; (b) local high-resolution sub-regions of left and right images

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Fig. 4. Fringe centers extracted by different methods. (a) Gray centroid method; (b) Steger method; (c) our method

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Fig. 5. Block gauges with heights of 1 mm and 6 mm

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Fig. 6. Point cloud obtained by our method

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Fig. 7. Measurement results of the arm model. (a) Measurement model; (b) three-dimensional point cloud data

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Fig. 8. Measurement results of the head model. (a) Measurement model; (b) three-dimensional point cloud data

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Table 1. Average running time of different methods
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Table 1. Average running time of different methods
Image No. Gray centroid method Steger method Our method
1 0.052429 0.740557 0.222822
2 0.045875 0.701235 0.229376
3 0.032768 0.734003 0.209715

Table 2. RMSE of different methods
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Table 2. RMSE of different methods
Image No. Gray centroid method Our method
Left Right Left Right
Average value 0.23 0.22 0.14 0.14
1 0.23 0.18 0.17 0.14
2 0.23 0.22 0.13 0.16
3 0.23 0.27 0.13 0.12

Table 3. RMSE of different schemes
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Table 3. RMSE of different schemes
Image No. CJ SJ BJ CD SD BD
Average value 0.140 0.092 0.066 0.082 0.068 0.044
1 0.11 0.08 0.07 0.07 0.05 0.05
2 0.16 0.07 0.07 0.10 0.05 0.04
3 0.16 0.11 0.04 0.11 0.07 0.03
4 0.14 0.12 0.07 0.08 0.10 0.05
5 0.13 0.08 0.08 0.05 0.07 0.05

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Qunhong Lin, Ju Zhang, Kaiyong Jiang, Junyi Lin. Fast Multi-Line Structured Light Measurement Method Integrated with Region Matching[J]. Laser & Optoelectronics Progress, 2023, 60(1): 0112003

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