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27 January 2023 Fusion-based restoration method for uneven illumination images in deep sea
Ke Ke, Chunmin Zhang, Yujiao Zhang, Ning Chang, Feng Tang
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Proceedings Volume 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022); 125501C (2023) https://doi.org/10.1117/12.2666596
Event: International Conference on Optical and Photonic Engineering (icOPEN 2022), 2022, ONLINE, China
Abstract
Light is almost exhausted in the deep sea due to the attenuation of light caused by absorption and scattering, so artificial light is often required for deep water exploration. Under the influence of artificial illumination, light scattering and absorption, the image captured by imaging system often suffer from uneven illumination and contrast reduction. To address these issues, this paper proposes an effective method for deep-sea image recovery based on multi-scale fusion. Firstly, the luminance channel of the image is decomposed into a base layer and a detail layer through Weighted Least Squares (WLS) filter, and the luminance-adjustment image is obtained by combining adaptive luminance mapping and detail enhancement techniques. Next, the model-based dehazing method is introduced to obtain a global contrast-enhanced image. Finally, two weights are designed based on the above two inputs to produce an enhanced underwater image by multi-scale fusion. Simulation and experimental results show that the method can effectively improve the details in the shadow region of deep water images and eliminating the effects of uneven illumination.
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Ke Ke, Chunmin Zhang, Yujiao Zhang, Ning Chang, and Feng Tang "Fusion-based restoration method for uneven illumination images in deep sea", Proc. SPIE 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022), 125501C (27 January 2023); https://doi.org/10.1117/12.2666596
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KEYWORDS
Image fusion
Image contrast enhancement
Image enhancement
Light sources
Image filtering
Image processing
Light scattering
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