Optical Technique, Volume. 51, Issue 3, 294(2025)

Unsupervised speckle noise removal method for digital holographic reconstruction towards compression distortion

WANG Fu1... YU Mei1,* and JIANG Zhidi2 |Show fewer author(s)
Author Affiliations
  • 1College of Information Science and Engineering, Ningbo University, Ningbo 315211, China
  • 2College of Information Engineering, College of Science and Technology Ningbo University, Ningbo 315212, China
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    Digital holographic images are prone to distortion during the compression process, which degrades the quality of the reconstructed images and increases the difficulty of speckle noise removal. Moreover, existing speckle denoising methods require training different networks for varying degrees of compression distortion, limiting their flexibility in practical applications. In response to these issues, an unsupervised speckle noise removal method is proposed for digital holographic reconstructions towards compression distortion. Based on the quality factor of the compression process, a compression perception attention module is designed to dynamically adjust the network weights, achieving adaptive control over the denoising process. Secondly, a speckle noise correlation convolution is used in conjunction with a blind spot network architecture to prevent detail loss due to sampling density constraints. Finally, a nonlinear attention module is introduced to enhance the interaction of global information, allowing the network to more accurately capture speckle noise. Experimental results demonstrate that the proposed method effectively removes speckle noise while preserving more detailed information. Compared to existing methods, the proposed method achieves better results in both objective quality assessment and subjective visual perception.

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    WANG Fu, YU Mei, JIANG Zhidi. Unsupervised speckle noise removal method for digital holographic reconstruction towards compression distortion[J]. Optical Technique, 2025, 51(3): 294

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    Paper Information

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    Received: Aug. 6, 2024

    Accepted: May. 29, 2025

    Published Online: May. 29, 2025

    The Author Email: YU Mei (yumei@nbu.edu.cn)

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