{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:05:24Z","timestamp":1760234724444,"version":"build-2065373602"},"reference-count":66,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2021,6,8]],"date-time":"2021-06-08T00:00:00Z","timestamp":1623110400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Salient regions provide important cues for scene understanding to the human vision system. However, whether the detected salient regions are helpful in image blur estimation is unknown. In this study, a salient region guided blind image sharpness assessment (BISA) framework is proposed, and the effect of the detected salient regions on the BISA performance is investigated. Specifically, three salient region detection (SRD) methods and ten BISA models are jointly explored, during which the output saliency maps from SRD methods are re-organized as the input of BISA models. Consequently, the change in BISA metric values can be quantified and then directly related to the difference in BISA model inputs. Finally, experiments are conducted on three Gaussian blurring image databases, and the BISA prediction performance is evaluated. The comparison results indicate that salient region input can help achieve a close and sometimes superior performance to a BISA model over the whole image input. When using the center region input as the baseline, the detected salient regions from the saliency optimization from robust background detection (SORBD) method lead to consistently better score prediction, regardless of the BISA model. Based on the proposed hybrid framework, this study reveals that saliency detection benefits image blur estimation, while how to properly incorporate SRD methods and BISA models to improve the score prediction will be explored in our future work.<\/jats:p>","DOI":"10.3390\/s21123963","type":"journal-article","created":{"date-parts":[[2021,6,8]],"date-time":"2021-06-08T21:16:58Z","timestamp":1623187018000},"page":"3963","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Salient Region Guided Blind Image Sharpness Assessment"],"prefix":"10.3390","volume":"21","author":[{"given":"Siqi","family":"Liu","sequence":"first","affiliation":[{"name":"Key Laboratory of Convergent Media and Intelligent Technology (Communication University of China), Ministry of Education, Beijing 100024, China"},{"name":"School of Information and Communication Engineering, Communication University of China, Beijing 100024, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3412-2159","authenticated-orcid":false,"given":"Shaode","family":"Yu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Convergent Media and Intelligent Technology (Communication University of China), Ministry of Education, Beijing 100024, China"},{"name":"School of Information and Communication Engineering, Communication University of China, Beijing 100024, China"}]},{"given":"Yanming","family":"Zhao","sequence":"additional","affiliation":[{"name":"Key Laboratory of Convergent Media and Intelligent Technology (Communication University of China), Ministry of Education, Beijing 100024, China"},{"name":"School of Information and Communication Engineering, Communication University of China, Beijing 100024, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9011-8464","authenticated-orcid":false,"given":"Zhulin","family":"Tao","sequence":"additional","affiliation":[{"name":"Key Laboratory of Convergent Media and Intelligent Technology (Communication University of China), Ministry of Education, Beijing 100024, China"},{"name":"School of Information and Communication Engineering, Communication University of China, Beijing 100024, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8869-6166","authenticated-orcid":false,"given":"Hang","family":"Yu","sequence":"additional","affiliation":[{"name":"School of Aerospace Science and Technology, Xidian University, Xi\u2019an 710126, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4530-2996","authenticated-orcid":false,"given":"Libiao","family":"Jin","sequence":"additional","affiliation":[{"name":"Key Laboratory of Convergent Media and Intelligent Technology (Communication University of China), Ministry of Education, Beijing 100024, China"},{"name":"School of Information and Communication Engineering, Communication University of China, Beijing 100024, China"}]}],"member":"1968","published-online":{"date-parts":[[2021,6,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1348\/000712601162103","article-title":"A selective review of selective attention research from the past century","volume":"92","author":"Driver","year":"2001","journal-title":"Br. 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