Target flow field reconstruction based on dual tree complex wavelet transform and optical flow

Xinggui Xu; Hong Li; Yue Zhang; Weihe Ren; Tao Zhang

doi:10.1117/12.3006467

18 December 2023 Target flow field reconstruction based on dual tree complex wavelet transform and optical flow

Xinggui Xu, Hong Li, Yue Zhang, Weihe Ren, Tao Zhang

Proceedings Volume 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration; 129591P (2023) https://doi.org/10.1117/12.3006467
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

Background oriented system (BOS) technology is widely used for measuring flow field density information. The fingerprint information of high-speed target flow field can be calculated with the digital image correction (DIC) method. However, these traditional DIC algorithms are unable to obtain large-scale features of target flow fields and costing high computational complexity. To deal with those problems, a method combination of dual tree complex wavelet transform and optical flow (DTCWT-OF) is proposed. The proposed method adopts a much sparser gradient divergence regularization to obtain much more sparse statistical characteristics of the target flow field, and utilize the prior knowledge of the target flow field fingerprint information. Meanwhile, the reconstruction method is processed in the wavelet transform domain. Compared to traditional DIC methods, the experimental results show that the proposed method improves the SNR by 5dB and can achieve quasi real-time reconstruction.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xinggui Xu, Hong Li, Yue Zhang, Weihe Ren, and Tao Zhang "Target flow field reconstruction based on dual tree complex wavelet transform and optical flow", Proc. SPIE 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration, 129591P (18 December 2023); https://doi.org/10.1117/12.3006467

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KEYWORDS

Detection and tracking algorithms

Digital image correlation

Optical flow

Wavelet transforms

Image restoration

Refractive index

Imaging systems

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