{"id":"https://openalex.org/W3193346232","doi":"https://doi.org/10.3390/rs14092190","title":"Sparse Regularization with a Non-Convex Penalty for SAR Imaging and Autofocusing","display_name":"Sparse Regularization with a Non-Convex Penalty for SAR Imaging and Autofocusing","publication_year":2022,"publication_date":"2022-05-04","ids":{"openalex":"https://openalex.org/W3193346232","doi":"https://doi.org/10.3390/rs14092190","mag":"3193346232"},"language":"en","primary_location":{"id":"doi:10.3390/rs14092190","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs14092190","pdf_url":"https://www.mdpi.com/2072-4292/14/9/2190/pdf?version=1651901620","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.mdpi.com/2072-4292/14/9/2190/pdf?version=1651901620","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5027107298","display_name":"Zi-Yao Zhang","orcid":null},"institutions":[{"id":"https://openalex.org/I36234482","display_name":"University of Bristol","ror":"https://ror.org/0524sp257","country_code":"GB","type":"education","lineage":["https://openalex.org/I36234482"]}],"countries":["GB"],"is_corresponding":true,"raw_author_name":"Zi-Yao Zhang","raw_affiliation_strings":["Visual Information Laboratory, University of Bristol, Bristol BS1 5TE, UK"],"affiliations":[{"raw_affiliation_string":"Visual Information Laboratory, University of Bristol, Bristol BS1 5TE, UK","institution_ids":["https://openalex.org/I36234482"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5044802931","display_name":"Odysseas Pappas","orcid":"https://orcid.org/0000-0003-3037-2828"},"institutions":[{"id":"https://openalex.org/I36234482","display_name":"University of Bristol","ror":"https://ror.org/0524sp257","country_code":"GB","type":"education","lineage":["https://openalex.org/I36234482"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Odysseas Pappas","raw_affiliation_strings":["Visual Information Laboratory, University of Bristol, Bristol BS1 5TE, UK"],"affiliations":[{"raw_affiliation_string":"Visual Information Laboratory, University of Bristol, Bristol BS1 5TE, UK","institution_ids":["https://openalex.org/I36234482"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5080767866","display_name":"Igor Rizaev","orcid":"https://orcid.org/0000-0002-5716-903X"},"institutions":[{"id":"https://openalex.org/I36234482","display_name":"University of Bristol","ror":"https://ror.org/0524sp257","country_code":"GB","type":"education","lineage":["https://openalex.org/I36234482"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Igor G. Rizaev","raw_affiliation_strings":["Visual Information Laboratory, University of Bristol, Bristol BS1 5TE, UK"],"affiliations":[{"raw_affiliation_string":"Visual Information Laboratory, University of Bristol, Bristol BS1 5TE, UK","institution_ids":["https://openalex.org/I36234482"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5001624119","display_name":"Alin Achim","orcid":"https://orcid.org/0000-0002-0982-7798"},"institutions":[{"id":"https://openalex.org/I36234482","display_name":"University of Bristol","ror":"https://ror.org/0524sp257","country_code":"GB","type":"education","lineage":["https://openalex.org/I36234482"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Alin Achim","raw_affiliation_strings":["Visual Information Laboratory, University of Bristol, Bristol BS1 5TE, UK"],"affiliations":[{"raw_affiliation_string":"Visual Information Laboratory, University of Bristol, Bristol BS1 5TE, UK","institution_ids":["https://openalex.org/I36234482"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5027107298"],"corresponding_institution_ids":["https://openalex.org/I36234482"],"apc_list":{"value":2500,"currency":"CHF","value_usd":2707},"apc_paid":{"value":2500,"currency":"CHF","value_usd":2707},"fwci":1.7227,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.8882376,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"14","issue":"9","first_page":"2190","last_page":"2190"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11038","display_name":"Advanced SAR Imaging Techniques","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11038","display_name":"Advanced SAR Imaging Techniques","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10801","display_name":"Synthetic Aperture Radar (SAR) Applications and Techniques","score":0.9988999962806702,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10500","display_name":"Sparse and Compressive Sensing Techniques","score":0.9975000023841858,"subfield":{"id":"https://openalex.org/subfields/2206","display_name":"Computational Mechanics"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6563950777053833},{"id":"https://openalex.org/keywords/regularization","display_name":"Regularization (linguistics)","score":0.5859285593032837},{"id":"https://openalex.org/keywords/minification","display_name":"Minification","score":0.5774411559104919},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.5754305124282837},{"id":"https://openalex.org/keywords/focus","display_name":"Focus (optics)","score":0.5691617131233215},{"id":"https://openalex.org/keywords/inverse-problem","display_name":"Inverse problem","score":0.4842209815979004},{"id":"https://openalex.org/keywords/phase-retrieval","display_name":"Phase retrieval","score":0.4487789571285248},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.4462154507637024},{"id":"https://openalex.org/keywords/convergence","display_name":"Convergence (economics)","score":0.4373583197593689},{"id":"https://openalex.org/keywords/regular-polygon","display_name":"Regular polygon","score":0.41867369413375854},{"id":"https://openalex.org/keywords/convex-optimization","display_name":"Convex optimization","score":0.4139867424964905},{"id":"https://openalex.org/keywords/penalty-method","display_name":"Penalty method","score":0.41149210929870605},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.3062289357185364},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.25989827513694763},{"id":"https://openalex.org/keywords/fourier-transform","display_name":"Fourier transform","score":0.13632732629776},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.08301010727882385}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6563950777053833},{"id":"https://openalex.org/C2776135515","wikidata":"https://www.wikidata.org/wiki/Q17143721","display_name":"Regularization (linguistics)","level":2,"score":0.5859285593032837},{"id":"https://openalex.org/C147764199","wikidata":"https://www.wikidata.org/wiki/Q6865248","display_name":"Minification","level":2,"score":0.5774411559104919},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5754305124282837},{"id":"https://openalex.org/C192209626","wikidata":"https://www.wikidata.org/wiki/Q190909","display_name":"Focus (optics)","level":2,"score":0.5691617131233215},{"id":"https://openalex.org/C135252773","wikidata":"https://www.wikidata.org/wiki/Q1567213","display_name":"Inverse problem","level":2,"score":0.4842209815979004},{"id":"https://openalex.org/C81793267","wikidata":"https://www.wikidata.org/wiki/Q7180962","display_name":"Phase retrieval","level":3,"score":0.4487789571285248},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.4462154507637024},{"id":"https://openalex.org/C2777303404","wikidata":"https://www.wikidata.org/wiki/Q759757","display_name":"Convergence (economics)","level":2,"score":0.4373583197593689},{"id":"https://openalex.org/C112680207","wikidata":"https://www.wikidata.org/wiki/Q714886","display_name":"Regular polygon","level":2,"score":0.41867369413375854},{"id":"https://openalex.org/C157972887","wikidata":"https://www.wikidata.org/wiki/Q463359","display_name":"Convex optimization","level":3,"score":0.4139867424964905},{"id":"https://openalex.org/C6180225","wikidata":"https://www.wikidata.org/wiki/Q3411771","display_name":"Penalty method","level":2,"score":0.41149210929870605},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.3062289357185364},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.25989827513694763},{"id":"https://openalex.org/C102519508","wikidata":"https://www.wikidata.org/wiki/Q6520159","display_name":"Fourier transform","level":2,"score":0.13632732629776},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.08301010727882385},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.0},{"id":"https://openalex.org/C50522688","wikidata":"https://www.wikidata.org/wiki/Q189833","display_name":"Economic growth","level":1,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0}],"mesh":[],"locations_count":5,"locations":[{"id":"doi:10.3390/rs14092190","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs14092190","pdf_url":"https://www.mdpi.com/2072-4292/14/9/2190/pdf?version=1651901620","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},{"id":"pmh:oai:research-information.bris.ac.uk:openaire_cris_publications/d54e6b9b-16b2-435b-98dd-3d10881aabd6","is_oa":true,"landing_page_url":"https://research-information.bris.ac.uk/en/publications/d54e6b9b-16b2-435b-98dd-3d10881aabd6","pdf_url":null,"source":{"id":"https://openalex.org/S4306400895","display_name":"Bristol Research (University of Bristol)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I36234482","host_organization_name":"University of Bristol","host_organization_lineage":["https://openalex.org/I36234482"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Zhang, Z, Pappas, O, Rizaev, I G & Achim, A 2022, 'Sparse Regularization with a Non-Convex Penalty for SAR Imaging and Autofocusing', Remote Sensing, vol. 14, no. 9, 2190. https://doi.org/10.3390/rs14092190","raw_type":"info:eu-repo/semantics/publishedVersion"},{"id":"pmh:oai:doaj.org/article:24e437645cd24268a0fa9599ad2f7443","is_oa":true,"landing_page_url":"https://doaj.org/article/24e437645cd24268a0fa9599ad2f7443","pdf_url":null,"source":{"id":"https://openalex.org/S112646816","display_name":"SHILAP Revista de lepidopterolog\u00eda","issn_l":"0300-5267","issn":["0300-5267","2340-4078"],"is_oa":true,"is_in_doaj":true,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Remote Sensing, Vol 14, Iss 9, p 2190 (2022)","raw_type":"article"},{"id":"pmh:oai:mdpi.com:/2072-4292/14/9/2190/","is_oa":true,"landing_page_url":"https://dx.doi.org/10.3390/rs14092190","pdf_url":null,"source":{"id":"https://openalex.org/S4306400947","display_name":"MDPI (MDPI AG)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4210097602","host_organization_name":"Multidisciplinary Digital Publishing Institute (Switzerland)","host_organization_lineage":["https://openalex.org/I4210097602"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Remote Sensing; Volume 14; Issue 9; Pages: 2190","raw_type":"Text"},{"id":"pmh:oai:research-information.bris.ac.uk:openaire/d54e6b9b-16b2-435b-98dd-3d10881aabd6","is_oa":true,"landing_page_url":"https://hdl.handle.net/1983/d54e6b9b-16b2-435b-98dd-3d10881aabd6","pdf_url":null,"source":{"id":"https://openalex.org/S4306400895","display_name":"Bristol Research (University of Bristol)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I36234482","host_organization_name":"University of Bristol","host_organization_lineage":["https://openalex.org/I36234482"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Zhang, Z, Pappas, O, Rizaev, I G & Achim, A 2022, 'Sparse Regularization with a Non-Convex Penalty for SAR Imaging and Autofocusing', Remote Sensing, vol. 14, no. 9, 2190. https://doi.org/10.3390/rs14092190","raw_type":"info:eu-repo/semantics/publishedVersion"}],"best_oa_location":{"id":"doi:10.3390/rs14092190","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs14092190","pdf_url":"https://www.mdpi.com/2072-4292/14/9/2190/pdf?version=1651901620","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/14","score":0.8199999928474426,"display_name":"Life below water"}],"awards":[{"id":"https://openalex.org/G6214462845","display_name":null,"funder_award_id":"EP/R009260/1","funder_id":"https://openalex.org/F4320334627","funder_display_name":"Engineering and Physical Sciences Research Council"}],"funders":[{"id":"https://openalex.org/F4320334627","display_name":"Engineering and Physical Sciences Research Council","ror":"https://ror.org/0439y7842"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W3193346232.pdf","grobid_xml":"https://content.openalex.org/works/W3193346232.grobid-xml"},"referenced_works_count":51,"referenced_works":["https://openalex.org/W1557899381","https://openalex.org/W1575701986","https://openalex.org/W1794533974","https://openalex.org/W1967138577","https://openalex.org/W1982913482","https://openalex.org/W1986748469","https://openalex.org/W2001249946","https://openalex.org/W2007695941","https://openalex.org/W2011716365","https://openalex.org/W2013098306","https://openalex.org/W2013208486","https://openalex.org/W2015435644","https://openalex.org/W2016626869","https://openalex.org/W2018301928","https://openalex.org/W2048659479","https://openalex.org/W2069260179","https://openalex.org/W2079299474","https://openalex.org/W2080744942","https://openalex.org/W2082542187","https://openalex.org/W2085711939","https://openalex.org/W2105191172","https://openalex.org/W2110965352","https://openalex.org/W2114169008","https://openalex.org/W2124348301","https://openalex.org/W2125856058","https://openalex.org/W2129732816","https://openalex.org/W2132042151","https://openalex.org/W2136005975","https://openalex.org/W2142122312","https://openalex.org/W2423620120","https://openalex.org/W2440124605","https://openalex.org/W2508699504","https://openalex.org/W2607796291","https://openalex.org/W2624715179","https://openalex.org/W2626889935","https://openalex.org/W2803186959","https://openalex.org/W2809395972","https://openalex.org/W2954505280","https://openalex.org/W2994750935","https://openalex.org/W3011139149","https://openalex.org/W3023956684","https://openalex.org/W3035534429","https://openalex.org/W3095095911","https://openalex.org/W3103773508","https://openalex.org/W3104630443","https://openalex.org/W3123596047","https://openalex.org/W3127855864","https://openalex.org/W3140025309","https://openalex.org/W3161358126","https://openalex.org/W3193262203","https://openalex.org/W4220861654"],"related_works":["https://openalex.org/W1965977581","https://openalex.org/W2061980133","https://openalex.org/W2050855072","https://openalex.org/W2077506191","https://openalex.org/W2387685679","https://openalex.org/W3043683231","https://openalex.org/W3134728064","https://openalex.org/W2115238236","https://openalex.org/W2374214022","https://openalex.org/W2347781941"],"abstract_inverted_index":{"In":[0,164],"this":[1],"paper,":[2],"SAR":[3,162,173],"image":[4,42,52],"reconstruction":[5,53],"with":[6,180,185],"joint":[7],"phase":[8,45,130],"error":[9,131],"estimation":[10,132],"(autofocusing)":[11],"is":[12,26,33,134,150,206],"formulated":[13],"as":[14],"an":[15,29],"inverse":[16],"problem.":[17],"An":[18],"optimization":[19],"model":[20],"utilising":[21],"a":[22,72,87,115],"sparsity-enforcing":[23],"Cauchy":[24],"regularizer":[25],"proposed,":[27],"and":[28,43,139,160,188],"alternating":[30,121],"minimization":[31,122],"framework":[32],"used":[34],"to":[35,80,86,103,119,166,208,217],"solve":[36,81],"it,":[37],"in":[38,111,114,152],"which":[39],"the":[40,44,51,65,76,82,94,105,112,129,145,167,171,177,194],"desired":[41],"errors":[46],"are":[47,58,61,101,155],"estimated":[48],"alternatively.":[49],"For":[50,93,126],"sub-problem":[54,133],"(f-sub-problem),":[55],"two":[56,181,190],"methods":[57],"presented":[59],"that":[60],"capable":[62],"of":[63,75,98,147,193,198],"handling":[64],"problem\u2019s":[66],"complex":[67,73,88,109],"nature.":[68],"Firstly,":[69],"we":[70],"design":[71],"version":[74],"forward-backward":[77,89],"splitting":[78],"algorithm":[79],"f-sub-problem":[83,113],"iteratively,":[84],"leading":[85,118],"autofocusing":[90,123,211],"method":[91,205],"(CFBA).":[92],"second":[95],"variant,":[96],"techniques":[97],"Wirtinger":[99,120],"calculus":[100],"utilized":[102],"minimize":[104],"cost":[106,142],"function":[107],"involving":[108],"variables":[110],"direct":[116],"fashion,":[117],"(WAMA)":[124],"method.":[125],"both":[127,148,158],"methods,":[128],"solved":[135],"by":[136],"simply":[137],"expanding":[138],"observing":[140],"its":[141],"function.":[143],"Moreover,":[144],"convergence":[146],"algorithms":[149],"discussed":[151],"detail.":[153],"Experiments":[154],"conducted":[156],"on":[157,176,213],"simulated":[159],"real":[161,183],"images.":[163],"addition":[165],"synthetic":[168],"scene":[169],"employed,":[170],"other":[172],"images":[174,184],"focus":[175],"sea":[178,195],"surface,":[179],"being":[182,191],"ship":[186,201],"targets,":[187],"another":[189],"simulations":[192],"surface":[196],"(one":[197],"them":[199],"containing":[200],"wakes).":[202],"The":[203],"proposed":[204],"demonstrated":[207],"give":[209],"impressive":[210],"results":[212],"these":[214],"datasets":[215],"compared":[216],"state-of-the-art":[218],"methods.":[219]},"counts_by_year":[{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":1}],"updated_date":"2026-03-20T23:20:44.827607","created_date":"2021-08-30T00:00:00"}
