{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T15:12:22Z","timestamp":1778857942459,"version":"3.51.4"},"reference-count":74,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2025,5,9]],"date-time":"2025-05-09T00:00:00Z","timestamp":1746748800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key Project of Natural Science Research in Anhui Province","award":["2022AH051750"],"award-info":[{"award-number":["2022AH051750"]}]},{"name":"Key Project of Natural Science Research in Anhui Province","award":["2023AH010056"],"award-info":[{"award-number":["2023AH010056"]}]},{"name":"Key Project of Natural Science Research in Anhui Province","award":["2022tlxyrc11"],"award-info":[{"award-number":["2022tlxyrc11"]}]},{"name":"Excellent Innovative Research Team of universities in Anhui Province","award":["2022AH051750"],"award-info":[{"award-number":["2022AH051750"]}]},{"name":"Excellent Innovative Research Team of universities in Anhui Province","award":["2023AH010056"],"award-info":[{"award-number":["2023AH010056"]}]},{"name":"Excellent Innovative Research Team of universities in Anhui Province","award":["2022tlxyrc11"],"award-info":[{"award-number":["2022tlxyrc11"]}]},{"name":"Fundamental Research Funds for the Tongling University","award":["2022AH051750"],"award-info":[{"award-number":["2022AH051750"]}]},{"name":"Fundamental Research Funds for the Tongling University","award":["2023AH010056"],"award-info":[{"award-number":["2023AH010056"]}]},{"name":"Fundamental Research Funds for the Tongling University","award":["2022tlxyrc11"],"award-info":[{"award-number":["2022tlxyrc11"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>The properties of light propagation underwater typically cause color distortion and reduced contrast in underwater images. In addition, complex underwater lighting conditions can result in issues such as non-uniform illumination, spotting, and noise. To address these challenges, we propose an innovative underwater-image enhancement (UIE) approach based on maximum information-channel compensation and edge-preserving filtering techniques. Specifically, we first develop a channel information transmission strategy grounded in maximum information preservation principles, utilizing the maximum information channel to improve the color fidelity of the input image. Next, we locally enhance the color-corrected image using guided filtering and generate a series of globally contrast-enhanced images by applying gamma transformations with varying parameter values. In the final stage, the enhanced image sequence is decomposed into low-frequency (LF) and high-frequency (HF) components via side-window filtering. For the HF component, a weight map is constructed by calculating the difference between the current exposedness and the optimum exposure. For the LF component, we derive a comprehensive feature map by integrating the brightness map, saturation map, and saliency map, thereby accurately assessing the quality of degraded regions in a manner that aligns with the symmetry principle inherent in human vision. Ultimately, we combine the LF and HF components through a weighted summation process, resulting in a high-quality underwater image. Experimental results demonstrate that our method effectively achieves both color restoration and contrast enhancement, outperforming several State-of-the-Art UIE techniques across multiple datasets.<\/jats:p>","DOI":"10.3390\/sym17050725","type":"journal-article","created":{"date-parts":[[2025,5,9]],"date-time":"2025-05-09T06:18:51Z","timestamp":1746771531000},"page":"725","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Underwater-Image Enhancement Based on Maximum Information-Channel Correction and Edge-Preserving Filtering"],"prefix":"10.3390","volume":"17","author":[{"given":"Wei","family":"Liu","sequence":"first","affiliation":[{"name":"College of Mathematics and Computer Science, Tongling University, Tongling 244000, China"},{"name":"Anhui Engineering Research Center of Intelligent Manufacturing of Copper-Based Materials, Tongling 244000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jingxuan","family":"Xu","sequence":"additional","affiliation":[{"name":"College of Mathematics and Computer Science, Tongling University, Tongling 244000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Siying","family":"He","sequence":"additional","affiliation":[{"name":"College of Mathematics and Computer Science, Tongling University, Tongling 244000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yongzhen","family":"Chen","sequence":"additional","affiliation":[{"name":"College of Mathematics and Computer Science, Tongling University, Tongling 244000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xinyi","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Mathematics and Computer Science, Tongling University, Tongling 244000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4626-6176","authenticated-orcid":false,"given":"Hong","family":"Shu","sequence":"additional","affiliation":[{"name":"College of Mathematics and Computer Science, Tongling University, Tongling 244000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ping","family":"Qi","sequence":"additional","affiliation":[{"name":"College of Mathematics and Computer Science, Tongling University, Tongling 244000, China"},{"name":"Anhui Engineering Research Center of Intelligent Manufacturing of Copper-Based Materials, Tongling 244000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,5,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"106981","DOI":"10.1016\/j.compeleceng.2021.106981","article-title":"Color correction and adaptive contrast enhancement for underwater image enhancement","volume":"91","author":"Zhang","year":"2021","journal-title":"Comput. 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