{"id":"https://openalex.org/W2611606761","doi":"https://doi.org/10.1109/percom.2017.7917860","title":"Device-free and privacy preserving indoor positioning using infrared retro-reflection imaging","display_name":"Device-free and privacy preserving indoor positioning using infrared retro-reflection imaging","publication_year":2017,"publication_date":"2017-03-01","ids":{"openalex":"https://openalex.org/W2611606761","doi":"https://doi.org/10.1109/percom.2017.7917860","mag":"2611606761"},"language":"en","primary_location":{"id":"doi:10.1109/percom.2017.7917860","is_oa":false,"landing_page_url":"https://doi.org/10.1109/percom.2017.7917860","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2017 IEEE International Conference on Pervasive Computing and Communications (PerCom)","raw_type":"proceedings-article"},"type":"conference-paper","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5023086235","display_name":"Hiroaki Santo","orcid":"https://orcid.org/0000-0003-2891-5993"},"institutions":[{"id":"https://openalex.org/I98285908","display_name":"The University of Osaka","ror":"https://ror.org/035t8zc32","country_code":"JP","type":"education","lineage":["https://openalex.org/I98285908"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Hiroaki Santo","raw_affiliation_strings":["Graduate School of Information Science and Technology, Osaka University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Graduate School of Information Science and Technology, Osaka University","institution_ids":["https://openalex.org/I98285908"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5039456378","display_name":"Takuya Maekawa","orcid":"https://orcid.org/0000-0002-7227-580X"},"institutions":[{"id":"https://openalex.org/I98285908","display_name":"The University of Osaka","ror":"https://ror.org/035t8zc32","country_code":"JP","type":"education","lineage":["https://openalex.org/I98285908"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Takuya Maekawa","raw_affiliation_strings":["Graduate School of Information Science and Technology, Osaka University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Graduate School of Information Science and Technology, Osaka University","institution_ids":["https://openalex.org/I98285908"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5033986386","display_name":"Yasuyuki Matsushita","orcid":"https://orcid.org/0000-0002-1935-4752"},"institutions":[{"id":"https://openalex.org/I98285908","display_name":"The University of Osaka","ror":"https://ror.org/035t8zc32","country_code":"JP","type":"education","lineage":["https://openalex.org/I98285908"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Yasuyuki Matsushita","raw_affiliation_strings":["Graduate School of Information Science and Technology, Osaka University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Graduate School of Information Science and Technology, Osaka University","institution_ids":["https://openalex.org/I98285908"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I98285908"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":23,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10326","display_name":"Indoor and Outdoor Localization Technologies","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic 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/T10326","display_name":"Indoor and Outdoor Localization Technologies","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic 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/T12222","display_name":"IoT-based Smart Home Systems","score":0.9904999732971191,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic 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/T10851","display_name":"Optical Wireless Communication Technologies","score":0.9869999885559082,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"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/retroreflector","display_name":"Retroreflector","score":0.7543806433677673},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.7297423481941223},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7042421698570251},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.6404228210449219},{"id":"https://openalex.org/keywords/visibility","display_name":"Visibility","score":0.44299134612083435},{"id":"https://openalex.org/keywords/reflection","display_name":"Reflection (computer programming)","score":0.42069023847579956},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.16915521025657654}],"concepts":[{"id":"https://openalex.org/C135339813","wikidata":"https://www.wikidata.org/wiki/Q2835","display_name":"Retroreflector","level":3,"score":0.7543806433677673},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.7297423481941223},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7042421698570251},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.6404228210449219},{"id":"https://openalex.org/C123403432","wikidata":"https://www.wikidata.org/wiki/Q654068","display_name":"Visibility","level":2,"score":0.44299134612083435},{"id":"https://openalex.org/C65682993","wikidata":"https://www.wikidata.org/wiki/Q1056451","display_name":"Reflection (computer programming)","level":2,"score":0.42069023847579956},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.16915521025657654},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C520434653","wikidata":"https://www.wikidata.org/wiki/Q38867","display_name":"Laser","level":2,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/percom.2017.7917860","is_oa":false,"landing_page_url":"https://doi.org/10.1109/percom.2017.7917860","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2017 IEEE International Conference on Pervasive Computing and Communications (PerCom)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320334764","display_name":"Japan Society for the Promotion of Science","ror":"https://ror.org/00hhkn466"},{"id":"https://openalex.org/F4320338075","display_name":"Core Research for Evolutional Science and Technology","ror":"https://ror.org/00097mb19"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":40,"referenced_works":["https://openalex.org/W1483307070","https://openalex.org/W1514682557","https://openalex.org/W1516653016","https://openalex.org/W1913214099","https://openalex.org/W1981934656","https://openalex.org/W1982578217","https://openalex.org/W1982784693","https://openalex.org/W1992989752","https://openalex.org/W1997613427","https://openalex.org/W2024044290","https://openalex.org/W2024669213","https://openalex.org/W2043050651","https://openalex.org/W2048022299","https://openalex.org/W2065429801","https://openalex.org/W2068853457","https://openalex.org/W2084320071","https://openalex.org/W2094204865","https://openalex.org/W2100989187","https://openalex.org/W2102332722","https://openalex.org/W2106208513","https://openalex.org/W2106242530","https://openalex.org/W2108482152","https://openalex.org/W2112737587","https://openalex.org/W2118975298","https://openalex.org/W2121868539","https://openalex.org/W2125186487","https://openalex.org/W2131085904","https://openalex.org/W2140018885","https://openalex.org/W2148198023","https://openalex.org/W2160422456","https://openalex.org/W2164692160","https://openalex.org/W2170589361","https://openalex.org/W2509382177","https://openalex.org/W3101736212","https://openalex.org/W4242398968","https://openalex.org/W4243034134","https://openalex.org/W4245034330","https://openalex.org/W6645893810","https://openalex.org/W6656700134","https://openalex.org/W6678336268"],"related_works":["https://openalex.org/W2481129004","https://openalex.org/W2320614092","https://openalex.org/W2068574173","https://openalex.org/W2060246182","https://openalex.org/W659006685","https://openalex.org/W612265574","https://openalex.org/W568916667","https://openalex.org/W2326160577","https://openalex.org/W2497633036","https://openalex.org/W4361019548"],"abstract_inverted_index":{"Indoor":[0],"positioning":[1,27,123],"is":[2,108],"a":[3,21,58,66,82],"core":[4],"technology":[5],"for":[6],"indoor":[7,26],"daily":[8],"life":[9],"applications":[10],"such":[11],"as":[12],"elderly":[13],"care":[14],"and":[15,23,33,56,65,101],"home":[16],"automation.":[17],"This":[18],"study":[19],"presents":[20],"device-free":[22],"privacy":[24],"preserving":[25],"method":[28,37,74,119],"using":[29],"infrared":[30],"(IR)":[31],"cameras":[32,40],"retroreflectors.":[34],"The":[35],"proposed":[36],"uses":[38],"IR":[39,43],"equipped":[41],"with":[42],"LEDs":[44],"to":[45,51,87,96],"capture":[46],"retroreflections":[47],"from":[48],"markers":[49],"attached":[50],"walls":[52],"in":[53,113],"the":[54,63,70,88,103,106],"environment,":[55],"detects":[57],"person":[59,83,107],"who":[60],"passes":[61],"between":[62],"camera":[64,92],"marker":[67],"by":[68],"observing":[69],"occlusion.":[71],"Because":[72],"our":[73,91,118],"employs":[75],"occlusion":[76],"of":[77,105,125],"markers,":[78],"it":[79],"can":[80],"track":[81],"without":[84],"attaching":[85],"tags":[86],"person.":[89],"Also,":[90],"device":[93],"permits":[94],"us":[95],"filter":[97],"out":[98],"visible":[99],"light":[100],"thus":[102],"appearance":[104],"not":[109],"recorded.":[110],"Our":[111],"evaluation":[112],"real":[114],"environments":[115],"showed":[116],"that":[117],"achieved":[120],"an":[121],"average":[122],"error":[124],"about":[126],"0.3":[127],"meters.":[128]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":4},{"year":2021,"cited_by_count":5},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":4},{"year":2018,"cited_by_count":5}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2025-10-10T00:00:00"}