Abstract
Underwater image enhancement is a technique that improves the quality of underwater images, which makes them clearer and more realistic. However, because of the complexity of underwater environments, underwater image enhancement faces many challenges, such as the variation in underwater optical properties as well as low contrast, low brightness, and color distortion in underwater images. To extract underwater image features more effectively, this paper proposes an underwater image enhancement algorithm called cross attention-based underwater image enhancement (CAUIE). The algorithm combines cross large kernel attention and dynamic enhancement modules to build a U-Net model. Cross larger attention uses large kernel attention mechanism to capture the local and global information of underwater images alternately, thus enhancing the semantic representation of the images. The dynamic enhancement module, by contrast, dynamically adjusts the enhancement parameters according to different regions of the image to acquire detail information. In addition, this paper introduces a contrast regularization loss to construct a hybrid loss function for guiding the training and optimization of the model. The experimental results show that the proposed algorithm outperforms the comparison algorithm in both subjective visual and objective evaluation criteria. Moreover, the proposed model obtains PSNR and SSIM results of 34.86 dB and 0.996, respectively, increasing the results of the previous model by 7.97 dB and 0.099, which illustrates that the proposed algorithm can solve the color distortion problem and recover the contrast and clarity of underwater images.And CAUIE achieved good results in two no-reference underwater evaluation metrics UIQM and UCIQE.
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The data that support the findings of this study are available from the corresponding author, Jinhua Wang, upon reasonable request.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (No. 62172045 and No. 62272049), the Academic Research Projects of Beijing Union University (No. ZKZD202301).
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SX contributed to conceptualization, methodology, investigation, formal analysis, and writing of the original draft. JW was responsible for project administration, supervision, and funding acquisition and also contributed to writing the review and editing. NH assisted with software and wrote the review and editing. XH provided software support, conducted formal analysis, and contributed to visualization. FS conducted ablation experiments and contributed to validation.
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Xu, S., Wang, J., He, N. et al. Underwater image enhancement method based on a cross attention mechanism. Multimedia Systems 30, 26 (2024). https://doi.org/10.1007/s00530-023-01224-5
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DOI: https://doi.org/10.1007/s00530-023-01224-5