Acta Photonica Sinica, Volume. 52, Issue 12, 1212004(2023)
Topography Measurement of Strongly Reflective Surfaces Based on Improved Automatic Multi-exposure and Digital Raster Projection Technology
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Fig. 6. Flow chart of the improved automatic multi-exposure image fusion method
Fig. 9. Striped image of standard blocks at different exposure times
Fig. 11. Stripe images of water pump pressure plate sheath under different methods
Fig. 13. Point cloud images of standard blocks measured by different methods
Fig. 14. Point cloud images of water pump pressure plate sheath measured by different methods
Fig. 15. Point cloud images of return disk measured by different methods
Table 1. The parameter values of the measured object
View tableView in ArticleTable 1. The parameter values of the measured object
Measured object Emin/lx Emax/lx T/ms α β c υ Standard block 84.496 1 11 418.78 749.1，315.96，133.27，56.21，23.71，10 0.25 0 1 5 Water pump pressure plate jacket 120.407 17 567.35 486.92，205.37，86.62，36.54，15.41，6.5 0.3 0 1 5 Return disk 96.325 6 14 273.48 599.28，252.77，106.61，44.97，18.97，8 0.25 0 1 7
Table 2. Number of point clouds and reconstruction rates measured by different 3D measurement methods
View tableView in ArticleTable 2. Number of point clouds and reconstruction rates measured by different 3D measurement methods
Measured object Standard block Water pump pressure plate jacket Return disk Number of point clouds Rebuild rate Number of point clouds Rebuild rate Number of point clouds Rebuild rate Projection phase method 27 081 81.11% 16 791 82.82% 94 530 84.38% Method of Ref.［ 8 ］29 193 87.44% 17 961 88.60% 102 281 91.30% Method of Ref.［ 9 ］31 010 92.88% 18 392 90.72% 108 551 96.90% Method in this paper 33 318 99.80% 20 110 99.20% 111 355 99.40% Reference value 33 386 100% 20 273 100% 112 027 100%
Table 3. Measurement results of height difference between standard step blocks using different methods
View tableView in ArticleTable 3. Measurement results of height difference between standard step blocks using different methods
Measurement method Height difference /mm Height error /mm Relative error Method of Ref.［ 11 ］9.116 7 +0.116 7 +1.297% Method in this paper 9.099 7 +0.099 7 +1.108%
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Jingfa LEI, Yin SUN, Miao ZHANG, Yongling LI, Ruhai ZHAO, Hong SUN. Topography Measurement of Strongly Reflective Surfaces Based on Improved Automatic Multi-exposure and Digital Raster Projection Technology[J]. Acta Photonica Sinica, 2023, 52(12): 1212004
Paper Information
Category: Instrumentation, Measurement and Metrology
Received: Apr. 24, 2023
Accepted: Jul. 20, 2023
Published Online: Feb. 19, 2024
The Author Email: Miao ZHANG (miao@ahjzu.edu.cn)
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