{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:55:54Z","timestamp":1760147754906,"version":"build-2065373602"},"reference-count":52,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2023,2,25]],"date-time":"2023-02-25T00:00:00Z","timestamp":1677283200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62261009","CRKL200106","YCBZ2022106"],"award-info":[{"award-number":["62261009","CRKL200106","YCBZ2022106"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Ministry of Education Key Laboratory of Cognitive Radio and Information Processing","award":["62261009","CRKL200106","YCBZ2022106"],"award-info":[{"award-number":["62261009","CRKL200106","YCBZ2022106"]}]},{"name":"Innovation Project of Guangxi Graduate Education","award":["62261009","CRKL200106","YCBZ2022106"],"award-info":[{"award-number":["62261009","CRKL200106","YCBZ2022106"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Online hashing is a valid storage and online retrieval scheme, which is meeting the rapid increase in data in the optical-sensor network and the real-time processing needs of users in the era of big data. Existing online-hashing algorithms rely on data tags excessively to construct the hash function, and ignore the mining of the structural features of the data itself, resulting in a serious loss of the image-streaming features and the reduction in retrieval accuracy. In this paper, an online hashing model that fuses global and local dual semantics is proposed. First, to preserve the local features of the streaming data, an anchor hash model, which is based on the idea of manifold learning, is constructed. Second, a global similarity matrix, which is used to constrain hash codes is built by the balanced similarity between the newly arrived data and previous data, which makes hash codes retain global data features as much as possible. Then, under a unified framework, an online hash model that integrates global and local dual semantics is learned, and an effective discrete binary-optimization solution is proposed. A large number of experiments on three datasets, including CIFAR10, MNIST and Places205, show that our proposed algorithm improves the efficiency of image retrieval effectively, compared with several existing advanced online-hashing algorithms.<\/jats:p>","DOI":"10.3390\/s23052576","type":"journal-article","created":{"date-parts":[[2023,2,27]],"date-time":"2023-02-27T02:15:37Z","timestamp":1677464137000},"page":"2576","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["An Online Hashing Algorithm for Image Retrieval Based on Optical-Sensor Network"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8705-7127","authenticated-orcid":false,"given":"Xiao","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China"}]},{"given":"Yanlong","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China"},{"name":"Ministry of Education Key Laboratory of Cognitive Radio and Information Processing, Guilin University of Electronic Technology, Guilin 541004, China"}]},{"given":"Chen","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,25]]},"reference":[{"key":"ref_1","first-page":"1","article-title":"Novel approach to evaluate classification algorithms and feature selection filter algorithms using medical data","volume":"2","author":"Masood","year":"2022","journal-title":"J. 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