Infrared and Laser Engineering, Volume. 54, Issue 8, 20250229(2025)
A beacon positioning method based on optical flow features for inter-missile laser communication
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Fig. 2. Schematic diagram of long-distance urban laser communication link
Fig. 3. (a) Optical flow tracking process under weak turbulence conditions contains spot image; (b) Inter frame motion trajectory of feature points
Fig. 4. Scatter plot of the position results comparison under weak turbulence conditions
Fig. 5. (a) Optical flow tracking process under moderate turbulence conditions contains spot image; (b) Inter frame motion trajectory of feature points
Fig. 6. Scatter plot of the position results comparison under middle turbulence conditions
Fig. 7. (a) Optical flow tracking process under strong turbulence conditions contains spot image; (b) Inter frame motion trajectory of feature points
Fig. 8. Scatter plot of the position results comparison under strong turbulence conditions
Table 1. Parameters of the experimental system
View tableView in ArticleTable 1. Parameters of the experimental system
System parameter Terminal 1 Terminal 2 CMOS pixels 1280 ×1024 655 × 491 CMOS pixel size/μm 6.7 9.9 Focal length/mm 600 1000 Enlargement factor 11 15 Aperture/mm 150 250 Divergence angle/μrad 200 400
Table 2. Comparison of experimental results under weak turbulence conditions
View tableView in ArticleTable 2. Comparison of experimental results under weak turbulence conditions
Our method Gray centroid method Average positioning error in the x-direction $\overline{\delta {x}} $ 0.234090 0.627406 Variance of x-direction positioning error σ2x/pixel2 0.018062 0.252740 Average positioning error in the y-direction $\overline{\delta {y}} $ 0.118877 0.570305 Variance of y-direction positioning error σ2y/pixel2 0.050619 0.187654
Table 3. Comparison of experimental results under moderate turbulence conditions
View tableView in ArticleTable 3. Comparison of experimental results under moderate turbulence conditions
Proposed method Gray centroid method Average positioning error in the x-direction $\overline{\delta {x}} $ 0.496088 1.242678 Variance of x-direction positioning error σ2x/pixel2 0.488235 0.745890 Average positioning error in the y-direction $ \overline{\delta {y}} $ 0.554112 1.166728 Variance of y-direction positioning error σ2y/pixel2 0.570379 0.674432
Table 4. Comparison of experimental results under strong turbulence conditions
View tableView in ArticleTable 4. Comparison of experimental results under strong turbulence conditions
Proposed method Gray centroid method Average positioning error in the x-direction $\overline{\delta {x}} $ 0.602735 1.324476 Variance of x-direction positioning error σ2x/pixel2 0.179202 1.196705 Average positioning error in the y-direction $\overline{\delta {y}} $ 1.110723 1.251136 Variance of y-direction positioning error σ2y/pixel2 0.389383 0.942534
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Xuewei WANG, Ninghua ZHANG, Qiang WANG. A beacon positioning method based on optical flow features for inter-missile laser communication[J]. Infrared and Laser Engineering, 2025, 54(8): 20250229
Paper Information
Category: 光通信与光传感
Received: Apr. 25, 2025
Accepted: --
Published Online: Aug. 29, 2025
The Author Email: Qiang WANG (wangleeqiang@163.com)
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