{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/guided-patch-wise-nonlocal-sar-despeckling","title":"Guided patch-wise nonlocal SAR despeckling","arxiv_id":"1811.11872","date":"2018-11-28","proceeding":null,"authors":["Sergio Vitale","Davide Cozzolino","Giuseppe Scarpa","Luisa Verdoliva","Giovanni Poggi"],"abstract":"We propose a new method for SAR image despeckling which leverages information\ndrawn from co-registered optical imagery. Filtering is performed by plain\npatch-wise nonlocal means, operating exclusively on SAR data. However, the\nfiltering weights are computed by taking into account also the optical guide,\nwhich is much cleaner than the SAR data, and hence more discriminative. To\navoid injecting optical-domain information into the filtered image, a\nSAR-domain statistical test is preliminarily performed to reject right away any\nrisky predictor. Experiments on two SAR-optical datasets prove the proposed\nmethod to suppress very effectively the speckle, preserving structural details,\nand without introducing visible filtering artifacts. Overall, the proposed\nmethod compares favourably with all state-of-the-art despeckling filters, and\nalso with our own previous optical-guided filter.","url_abs":"http://arxiv.org/abs/1811.11872v1","url_pdf":"http://arxiv.org/pdf/1811.11872v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"abstracts"},"code_links":[{"paper_slug":"guided-patch-wise-nonlocal-sar-despeckling","repo_url":"https://github.com/grip-unina/GNLM","is_official":1,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null}],"tasks":[{"task_slug":"sar-image-despeckling","task_name":"Sar Image Despeckling"}],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}