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Foundation","award":["0031504"],"award-info":[{"award-number":["0031504"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Deep learning (DL) models have recently been widely used in UAV aerial image semantic segmentation tasks and have achieved excellent performance. However, DL models are vulnerable to adversarial examples, which bring significant security risks to safety-critical systems. Existing research mainly focuses on solving digital attacks for aerial image semantic segmentation, but adversarial patches with physical attack attributes are more threatening than digital attacks. In this article, we systematically evaluate the threat of adversarial patches on the aerial image semantic segmentation task for the first time. To defend against adversarial patch attacks and obtain accurate semantic segmentation results, we construct a novel robust feature extraction network (RFENet). Based on the characteristics of aerial images and adversarial patches, RFENet designs a limited receptive field mechanism (LRFM), a spatial semantic enhancement module (SSEM), a boundary feature perception module (BFPM) and a global correlation encoder module (GCEM), respectively, to solve adversarial patch attacks from the DL model architecture design level. We discover that semantic features, shape features and global features contained in aerial images can significantly enhance the robustness of the DL model against patch attacks. Extensive experiments on three aerial image benchmark datasets demonstrate that the proposed RFENet has strong resistance to adversarial patch attacks compared with the existing state-of-the-art methods.<\/jats:p>","DOI":"10.3390\/rs15061690","type":"journal-article","created":{"date-parts":[[2023,3,21]],"date-time":"2023-03-21T06:56:48Z","timestamp":1679381808000},"page":"1690","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Defense against Adversarial Patch Attacks for Aerial Image Semantic Segmentation by Robust Feature Extraction"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5765-0827","authenticated-orcid":false,"given":"Zhen","family":"Wang","sequence":"first","affiliation":[{"name":"School of Information and Navigation, Air Force Engineering University, FengHao East Road, Xi\u2019an 710082, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Buhong","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Information and Navigation, Air Force Engineering University, FengHao East Road, Xi\u2019an 710082, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chuanlei","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Artificial Intelligence, Tianjin University of Science and Technology, Dagu South Road, Tianjin 300457, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3041-3557","authenticated-orcid":false,"given":"Yaohui","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Surveying and Geo-Informatics, Shandong Jianzhu University, FengMing Road, Jinan 250101, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Russell, B.J., Soffer, R.J., Ientilucci, E.J., Kuester, M.A., Conran, D.N., Arroyo-Mora, J.P., Ochoa, T., Durell, C., and Holt, J. 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