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Revelation of hidden 2D atmospheric turbulence strength fields from turbulence effects in infrared imaging

Abstract

Turbulence exists widely in the natural atmosphere and in industrial fluids. Strong randomness, anisotropy and mixing of multiple-scale eddies complicate the analysis and measurement of atmospheric turbulence. Although the spatially integrated strength of atmospheric turbulence can be roughly measured indirectly by Doppler radar or laser, direct measurement of two-dimensional (2D) strength fields of atmospheric turbulence is challenging. Here we attempt to solve this problem through infrared imaging. Specifically, we propose a physically boosted cooperative learning framework, termed the PBCL, to quantify 2D turbulence strength from infrared images. To demonstrate the capability of the PBCL, we constructed a dataset with 137,336 infrared images and corresponding 2D turbulence strength fields. The experimental results show that cooperative learning brings performance improvements, enabling the PBCL to simultaneously learn turbulence strength fields and inhibit adverse turbulence effects in images. Our work demonstrates the potential of imaging in measuring physical quantity fields.

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Fig. 1: Learning the hidden TS fields through the proposed framework.
Fig. 2: Visual presentation of some test results.
Fig. 3: Experimental results on real-world data.
Fig. 4: Comparison of turbulence effects inhibition.
Fig. 5: Fluctuations and pre-multiplied turbulence power spectra.
Fig. 6: Fields of kinetic energy dissipation rate and Reynolds stress derived from the PBCL results.

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Data availability

Our data include real data and simulated data. The real data were recorded by a infrared camera in outdoor atmospheric turbulence environment. The simulation data were synthesized by simulating the atmospheric turbulence effects on infrared images. The real data used in this paper and the full simulated data are publicly available in a Zenodo repository at https://doi.org/10.5281/zenodo.8002688 ref. 43. Source data are provided with this paper.

Code availability

The code presented in this article is publicly available through a Code Ocean compute capsule at https://doi.org/10.24433/CO.9167814.v1 ref. 44.

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Acknowledgements

X.B. acknowledges the support by the National Natural Science Foundation of China under Grant 62271016, the Beijing Natural Science Foundation under Grant 4222007, and the Fundamental Research Funds for the Central Universities. The funders had no role in study design, data collection and analysis, decision to publish or preparation of the manuscript. X. Jiang and Y. Hu, with the Image Processing Center of Beihang University, provided suggestions for the analysis of fluid mechanics.

Author information

Authors and Affiliations

Authors

Contributions

X.B. and Y.W. conceived and designed the experiments. Y.W. and D.J. performed the experiments. Y.W. and X.B. analyzed the data. X.B., Y.W. and J.C. contributed analysis tools. Y.W. and X.B. wrote the paper.

Corresponding author

Correspondence to Xiangzhi Bai.

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The authors declare no competing interests.

Peer review

Peer review information

Nature Computational Science thanks Kozo Fujii and the other, anonymous, reviewer(s) for their contribution to the peer review of this work. Primary Handling Editor: Jie Pan, in collaboration with the Nature Computational Science team.

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Supplementary information

Supplementary Information

Supplementary Sections 1 and 2, Figs. 1–8 and Tables 1–6.

Supplementary Video 1

Visual comparison of the proposed method and comparison methods on inhibiting turbulence effects.

Supplementary Video 2

The results of the proposed method on real data.

Source data

Source Data Fig. 1

Source data of the turbulence strength fields and source PSNR indicators on the whole test dataset, along with the code to conduct statistical analysis.

Source Data Fig. 2

Source data of the turbulence strength fields.

Source Data Fig. 3

Source data of the turbulence strength fields, input video and output video, along with the data processing code.

Source Data Fig. 4

Source data of the comparison videos, along with the data processing code.

Source Data Fig. 5

Source data of the turbulence strength fields, input video and output video, along with the data processing code.

Source Data Fig. 6

Source data of the turbulence strength fields and the data processing code.

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Wang, Y., Jin, D., Chen, J. et al. Revelation of hidden 2D atmospheric turbulence strength fields from turbulence effects in infrared imaging. Nat Comput Sci 3, 687–699 (2023). https://doi.org/10.1038/s43588-023-00498-z

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