{"id":"https://openalex.org/W4251670593","doi":"https://doi.org/10.1109/icpr.2004.1334519","title":"Perfect perspective projection using a varifocal mirror and its application to three-dimensional close-up imaging","display_name":"Perfect perspective projection using a varifocal mirror and its application to three-dimensional close-up imaging","publication_year":2004,"publication_date":"2004-01-01","ids":{"openalex":"https://openalex.org/W4251670593","doi":"https://doi.org/10.1109/icpr.2004.1334519"},"language":"en","primary_location":{"id":"doi:10.1109/icpr.2004.1334519","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icpr.2004.1334519","pdf_url":null,"source":{"id":"https://openalex.org/S4363608750","display_name":"Proceedings of the 17th International Conference on Pattern Recognition, 2004. ICPR 2004.","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 17th International Conference on Pattern Recognition, 2004. ICPR 2004.","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/A5060493253","display_name":"Akira Ishii","orcid":"https://orcid.org/0000-0003-4234-2749"},"institutions":[{"id":"https://openalex.org/I135768898","display_name":"Ritsumeikan University","ror":"https://ror.org/0197nmd03","country_code":"JP","type":"education","lineage":["https://openalex.org/I135768898","https://openalex.org/I4390039241"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"A. Ishii","raw_affiliation_strings":["Ritsumeikan Univ., Kyoto, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Ritsumeikan Univ., Kyoto, Japan","institution_ids":["https://openalex.org/I135768898"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5101626928","display_name":"Ryo Okada","orcid":"https://orcid.org/0000-0002-2563-6502"},"institutions":[{"id":"https://openalex.org/I135768898","display_name":"Ritsumeikan University","ror":"https://ror.org/0197nmd03","country_code":"JP","type":"education","lineage":["https://openalex.org/I135768898","https://openalex.org/I4390039241"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"R. Okada","raw_affiliation_strings":["Ritsumeikan Univ., Kyoto, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Ritsumeikan Univ., Kyoto, Japan","institution_ids":["https://openalex.org/I135768898"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I135768898"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.49912358,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"270","last_page":"273 Vol.3"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T13114","display_name":"Image Processing Techniques and Applications","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2214","display_name":"Media Technology"},"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/T13114","display_name":"Image Processing Techniques and Applications","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2214","display_name":"Media Technology"},"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/T10638","display_name":"Optical measurement and interference techniques","score":0.9472000002861023,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11897","display_name":"Digital Holography and Microscopy","score":0.9459999799728394,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/lens","display_name":"Lens (geology)","score":0.7411307692527771},{"id":"https://openalex.org/keywords/focal-length","display_name":"Focal length","score":0.7229732275009155},{"id":"https://openalex.org/keywords/magnification","display_name":"Magnification","score":0.7162668704986572},{"id":"https://openalex.org/keywords/perspective","display_name":"Perspective (graphical)","score":0.709364116191864},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.7030451893806458},{"id":"https://openalex.org/keywords/focal-point","display_name":"Focal point","score":0.662703275680542},{"id":"https://openalex.org/keywords/focus","display_name":"Focus (optics)","score":0.5864710211753845},{"id":"https://openalex.org/keywords/point","display_name":"Point (geometry)","score":0.5862091779708862},{"id":"https://openalex.org/keywords/projection","display_name":"Projection (relational algebra)","score":0.5751821398735046},{"id":"https://openalex.org/keywords/curved-mirror","display_name":"Curved mirror","score":0.5500763654708862},{"id":"https://openalex.org/keywords/depth-of-focus","display_name":"Depth of focus (tectonics)","score":0.46471938490867615},{"id":"https://openalex.org/keywords/parallel-projection","display_name":"Parallel projection","score":0.44490694999694824},{"id":"https://openalex.org/keywords/cardinal-point","display_name":"Cardinal point","score":0.43321582674980164},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.4210388958454132},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.3395935893058777},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.3071189224720001},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.30091047286987305},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2132977843284607},{"id":"https://openalex.org/keywords/geometry","display_name":"Geometry","score":0.11901229619979858},{"id":"https://openalex.org/keywords/orthographic-projection","display_name":"Orthographic projection","score":0.09876939654350281},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.09227976202964783}],"concepts":[{"id":"https://openalex.org/C15336307","wikidata":"https://www.wikidata.org/wiki/Q1766051","display_name":"Lens (geology)","level":2,"score":0.7411307692527771},{"id":"https://openalex.org/C82552819","wikidata":"https://www.wikidata.org/wiki/Q193540","display_name":"Focal length","level":3,"score":0.7229732275009155},{"id":"https://openalex.org/C4144372","wikidata":"https://www.wikidata.org/wiki/Q675287","display_name":"Magnification","level":2,"score":0.7162668704986572},{"id":"https://openalex.org/C12713177","wikidata":"https://www.wikidata.org/wiki/Q1900281","display_name":"Perspective (graphical)","level":2,"score":0.709364116191864},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.7030451893806458},{"id":"https://openalex.org/C2779433544","wikidata":"https://www.wikidata.org/wiki/Q1435226","display_name":"Focal point","level":3,"score":0.662703275680542},{"id":"https://openalex.org/C192209626","wikidata":"https://www.wikidata.org/wiki/Q190909","display_name":"Focus (optics)","level":2,"score":0.5864710211753845},{"id":"https://openalex.org/C28719098","wikidata":"https://www.wikidata.org/wiki/Q44946","display_name":"Point (geometry)","level":2,"score":0.5862091779708862},{"id":"https://openalex.org/C57493831","wikidata":"https://www.wikidata.org/wiki/Q3134666","display_name":"Projection (relational algebra)","level":2,"score":0.5751821398735046},{"id":"https://openalex.org/C81253797","wikidata":"https://www.wikidata.org/wiki/Q1506584","display_name":"Curved mirror","level":2,"score":0.5500763654708862},{"id":"https://openalex.org/C89002693","wikidata":"https://www.wikidata.org/wiki/Q1538481","display_name":"Depth of focus (tectonics)","level":4,"score":0.46471938490867615},{"id":"https://openalex.org/C26011984","wikidata":"https://www.wikidata.org/wiki/Q2112445","display_name":"Parallel projection","level":3,"score":0.44490694999694824},{"id":"https://openalex.org/C138395690","wikidata":"https://www.wikidata.org/wiki/Q376733","display_name":"Cardinal point","level":2,"score":0.43321582674980164},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4210388958454132},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.3395935893058777},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.3071189224720001},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.30091047286987305},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2132977843284607},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.11901229619979858},{"id":"https://openalex.org/C175694140","wikidata":"https://www.wikidata.org/wiki/Q980329","display_name":"Orthographic projection","level":2,"score":0.09876939654350281},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.09227976202964783},{"id":"https://openalex.org/C58097730","wikidata":"https://www.wikidata.org/wiki/Q176318","display_name":"Subduction","level":3,"score":0.0},{"id":"https://openalex.org/C77928131","wikidata":"https://www.wikidata.org/wiki/Q193343","display_name":"Tectonics","level":2,"score":0.0},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.0},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/icpr.2004.1334519","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icpr.2004.1334519","pdf_url":null,"source":{"id":"https://openalex.org/S4363608750","display_name":"Proceedings of the 17th International Conference on Pattern Recognition, 2004. ICPR 2004.","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 17th International Conference on Pattern Recognition, 2004. ICPR 2004.","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/11","score":0.5799999833106995,"display_name":"Sustainable cities and communities"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":3,"referenced_works":["https://openalex.org/W1755620341","https://openalex.org/W2154208007","https://openalex.org/W2166774562"],"related_works":["https://openalex.org/W1561540747","https://openalex.org/W1995450202","https://openalex.org/W2782563469","https://openalex.org/W2159501355","https://openalex.org/W1542807096","https://openalex.org/W2026494525","https://openalex.org/W2052233013","https://openalex.org/W4389924956","https://openalex.org/W2004051390","https://openalex.org/W2094583677"],"abstract_inverted_index":{"An":[0],"imaging":[1,22],"system":[2],"with":[3,57,107],"a":[4,15,96],"focusing":[5,56],"mechanism":[6],"based":[7],"on":[8],"perfect":[9],"perspective":[10,122],"projection":[11,123],"was":[12,29,36,53,62],"devised":[13],"using":[14],"varifocal":[16,34,59],"mirror":[17,35],"to":[18,65],"achieve":[19],"high-quality":[20],"three-dimensional":[21],"and":[23,72],"precise":[24],"measurement":[25],"of":[26,43,50,68,82,95],"shapes.":[27],"It":[28],"constructed":[30],"so":[31],"that":[32],"the":[33,39,44,51,58,66,69,73,78,83,108,112,118,121],"placed":[37],"at":[38,87],"object":[40,74,79],"focal":[41,48,70,80],"point":[42,49,75,81],"image-taking":[45],"lens.":[46,84],"The":[47,92],"lens":[52],"fixed":[54],"when":[55],"mirror.":[60],"Magnification":[61],"exactly":[63],"equal":[64],"ratio":[67],"length":[71],"distance":[76],"from":[77,117],"This":[85],"held":[86],"magnifications":[88],"larger":[89],"than":[90],"unity.":[91],"surface":[93],"shape":[94],"spherical":[97],"dent":[98,113],"(3.5":[99],"mm":[100],"in":[101,120],"diameter)":[102],"could":[103,114],"accurately":[104],"be":[105,115],"measured":[106],"shape-from-focus":[109],"method":[110],"because":[111],"viewed":[116],"side":[119],"system.":[124]},"counts_by_year":[{"year":2012,"cited_by_count":1}],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-10-10T00:00:00"}
