{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T16:03:32Z","timestamp":1783526612214,"version":"3.55.0"},"reference-count":29,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2023,1,17]],"date-time":"2023-01-17T00:00:00Z","timestamp":1673913600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key Research and Development Project of Shandong Province","award":["2020CXGC010706"],"award-info":[{"award-number":["2020CXGC010706"]}]},{"name":"Key Research and Development Project of Shandong Province","award":["No.tsqn201909007"],"award-info":[{"award-number":["No.tsqn201909007"]}]},{"name":"Key Research and Development Project of Shandong Province","award":["ZR2022MF339"],"award-info":[{"award-number":["ZR2022MF339"]}]},{"name":"Taishan Scholars Program of Shandong Province","award":["2020CXGC010706"],"award-info":[{"award-number":["2020CXGC010706"]}]},{"name":"Taishan Scholars Program of Shandong Province","award":["No.tsqn201909007"],"award-info":[{"award-number":["No.tsqn201909007"]}]},{"name":"Taishan Scholars Program of Shandong Province","award":["ZR2022MF339"],"award-info":[{"award-number":["ZR2022MF339"]}]},{"DOI":"10.13039\/501100007129","name":"Natural Science Foundation of Shandong Province","doi-asserted-by":"publisher","award":["2020CXGC010706"],"award-info":[{"award-number":["2020CXGC010706"]}],"id":[{"id":"10.13039\/501100007129","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100007129","name":"Natural Science Foundation of Shandong Province","doi-asserted-by":"publisher","award":["No.tsqn201909007"],"award-info":[{"award-number":["No.tsqn201909007"]}],"id":[{"id":"10.13039\/501100007129","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100007129","name":"Natural Science Foundation of Shandong Province","doi-asserted-by":"publisher","award":["ZR2022MF339"],"award-info":[{"award-number":["ZR2022MF339"]}],"id":[{"id":"10.13039\/501100007129","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The underwater hyperspectral imager enables the detection and identification of targets on the seafloor by collecting high-resolution spectral images. The distance between the hyperspectral imager and the targets cannot be consistent in real operation by factors such as motion and fluctuating terrain, resulting in unfocused images and negative effects on the identification. In this paper, we developed a novel integrated underwater hyperspectral imaging system for deep sea surveys and proposed an autofocus strategy based on liquid lens focusing transfer. The calibration tests provided a clear focus result for hyperspectral transects and a global spectral resolution of less than 7 nm in spectral range from 400 to 800 nm. The prototype was used to obtain spectrum and image information of manganese nodules and four other rocks in a laboratory environment. The classification of the five kinds of minerals was successfully realized by using a support vector machine. We tested the UHI prototype in the deep sea and observed a Psychropotidae specimen on the sediment from the in situ hyperspectral images. The results show that the prototype developed here can accurately and stably obtain hyperspectral data and has potential applications for in situ deep-sea exploration.<\/jats:p>","DOI":"10.3390\/rs15030544","type":"journal-article","created":{"date-parts":[[2023,1,17]],"date-time":"2023-01-17T02:58:16Z","timestamp":1673924296000},"page":"544","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Underwater Hyperspectral Imaging System with Liquid Lenses"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9845-7900","authenticated-orcid":false,"given":"Bohan","family":"Liu","sequence":"first","affiliation":[{"name":"School of Information Science & Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China"},{"name":"Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong University, Qingdao 266237, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4654-0857","authenticated-orcid":false,"given":"Shaojie","family":"Men","sequence":"additional","affiliation":[{"name":"School of Information Science & Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China"},{"name":"Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong University, Qingdao 266237, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhongjun","family":"Ding","sequence":"additional","affiliation":[{"name":"National Deep Sea Center, Qingdao 266061, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dewei","family":"Li","sequence":"additional","affiliation":[{"name":"National Deep Sea Center, Qingdao 266061, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhigang","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Information Science & Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China"},{"name":"Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong University, Qingdao 266237, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiahao","family":"He","sequence":"additional","affiliation":[{"name":"School of Information Science & Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haochen","family":"Ju","sequence":"additional","affiliation":[{"name":"School of Information Science & Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China"},{"name":"Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong University, Qingdao 266237, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mengling","family":"Shen","sequence":"additional","affiliation":[{"name":"School of Information Science & Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China"},{"name":"Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong University, Qingdao 266237, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qiuyuan","family":"Yu","sequence":"additional","affiliation":[{"name":"School of Information Science & Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhaojun","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Information Science & Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China"},{"name":"Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong University, Qingdao 266237, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"55","DOI":"10.3389\/fmars.2017.00055","article-title":"Obtaining Phytoplankton Diversity from Ocean Color: A Scientific Roadmap for Future Development","volume":"4","author":"Bracher","year":"2017","journal-title":"Front. 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