{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:46:43Z","timestamp":1760060803206,"version":"build-2065373602"},"reference-count":60,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2025,9,23]],"date-time":"2025-09-23T00:00:00Z","timestamp":1758585600000},"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":["62221004","62175110","TSXK2022D00x","23YJCZH013"],"award-info":[{"award-number":["62221004","62175110","TSXK2022D00x","23YJCZH013"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Nanjing University of Science and Technology","award":["62221004","62175110","TSXK2022D00x","23YJCZH013"],"award-info":[{"award-number":["62221004","62175110","TSXK2022D00x","23YJCZH013"]}]},{"name":"Humanities and Social Science Project of the Ministry of Education of China","award":["62221004","62175110","TSXK2022D00x","23YJCZH013"],"award-info":[{"award-number":["62221004","62175110","TSXK2022D00x","23YJCZH013"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Imaging"],"abstract":"<jats:p>Blind image deblurring, which requires simultaneous estimation of the latent image and blur kernel, constitutes a classic ill-posed problem. To address this, priors based on L2, L1, and Lp regularizations have been widely adopted. Based on this foundation and combining successful experiences of previous work, this paper introduces LN regularization, a novel nonlinear sparse regularization combining the Lp and L\u221e norms via nonlinear coupling. Statistical probability analysis demonstrates that LN regularization achieves stronger sparsity than traditional regularizations like L2, L1, and Lp regularizations. Furthermore, building upon the LN regularization, we propose a novel nonlinear sparse model for blind image deblurring. To optimize the proposed LN regularization, we introduce an Adaptive Generalized Soft-Thresholding (AGST) algorithm and further develop an efficient optimization strategy by integrating AGST with the Half-Quadratic Splitting (HQS) strategy. Extensive experiments conducted on synthetic datasets and real-world images demonstrate that the proposed nonlinear sparse model achieves superior deblurring performance while maintaining completive computational efficiency.<\/jats:p>","DOI":"10.3390\/jimaging11100327","type":"journal-article","created":{"date-parts":[[2025,9,23]],"date-time":"2025-09-23T15:54:54Z","timestamp":1758642894000},"page":"327","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Fast Nonlinear Sparse Model for Blind Image Deblurring"],"prefix":"10.3390","volume":"11","author":[{"given":"Zirui","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Physics, Nanjing University of Science and Technology, Nanjing 210094, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zheng","family":"Guo","sequence":"additional","affiliation":[{"name":"School of Physics, Nanjing University of Science and Technology, Nanjing 210094, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhenhua","family":"Xu","sequence":"additional","affiliation":[{"name":"Nanjing University of Science and Technology Tangshan Test Center, Nanjing University of Science and Technology, Nanjing 210000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huasong","family":"Chen","sequence":"additional","affiliation":[{"name":"Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huai\u2019an 223003, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chunyong","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Physics, Nanjing University of Science and Technology, Nanjing 210094, China"},{"name":"Engineering Research Center of Semiconductor Device Optoelectronic Hybrid Integration in Jiangsu Province, Nanjing 210000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yang","family":"Song","sequence":"additional","affiliation":[{"name":"School of Physics, Nanjing University of Science and Technology, Nanjing 210094, China"},{"name":"Engineering Research Center of Semiconductor Device Optoelectronic Hybrid Integration in Jiangsu Province, Nanjing 210000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiancheng","family":"Lai","sequence":"additional","affiliation":[{"name":"School of Physics, Nanjing University of Science and Technology, Nanjing 210094, China"},{"name":"Engineering Research Center of Semiconductor Device Optoelectronic Hybrid Integration in Jiangsu Province, Nanjing 210000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yunjing","family":"Ji","sequence":"additional","affiliation":[{"name":"School of Physics, Nanjing University of Science and Technology, Nanjing 210094, China"},{"name":"Engineering Research Center of Semiconductor Device Optoelectronic Hybrid Integration in Jiangsu Province, Nanjing 210000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhenhua","family":"Li","sequence":"additional","affiliation":[{"name":"School of Physics, Nanjing University of Science and Technology, Nanjing 210094, China"},{"name":"Engineering Research Center of Semiconductor Device Optoelectronic Hybrid Integration in Jiangsu Province, Nanjing 210000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,9,23]]},"reference":[{"key":"ref_1","unstructured":"Xu, L., Lu, C., Xu, Y., and Jia, J. 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