{"id":"https://openalex.org/W2141382815","doi":"https://doi.org/10.1109/cvprw.2011.5981785","title":"Viewpoint invariants from three-dimensional data: The role of reflection in human activity understanding","display_name":"Viewpoint invariants from three-dimensional data: The role of reflection in human activity understanding","publication_year":2011,"publication_date":"2011-06-01","ids":{"openalex":"https://openalex.org/W2141382815","doi":"https://doi.org/10.1109/cvprw.2011.5981785","mag":"2141382815"},"language":"en","primary_location":{"id":"doi:10.1109/cvprw.2011.5981785","is_oa":false,"landing_page_url":"https://doi.org/10.1109/cvprw.2011.5981785","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"CVPR 2011 WORKSHOPS","raw_type":"proceedings-article"},"type":"article","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/A5080661503","display_name":"Ramakrishna Kakarala","orcid":"https://orcid.org/0000-0001-6358-6991"},"institutions":[{"id":"https://openalex.org/I172675005","display_name":"Nanyang Technological University","ror":"https://ror.org/02e7b5302","country_code":"SG","type":"education","lineage":["https://openalex.org/I172675005"]}],"countries":["SG"],"is_corresponding":true,"raw_author_name":"Ramakrishna Kakarala","raw_affiliation_strings":["Nanyang Technological University, Singapore","Nanyang Technological University"],"affiliations":[{"raw_affiliation_string":"Nanyang Technological University, Singapore","institution_ids":["https://openalex.org/I172675005"]},{"raw_affiliation_string":"Nanyang Technological University","institution_ids":["https://openalex.org/I172675005"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108240828","display_name":"Prabhu Kaliamoorthi","orcid":null},"institutions":[{"id":"https://openalex.org/I172675005","display_name":"Nanyang Technological University","ror":"https://ror.org/02e7b5302","country_code":"SG","type":"education","lineage":["https://openalex.org/I172675005"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Prabhu Kaliamoorthi","raw_affiliation_strings":["Nanyang Technological University, Singapore","Nanyang Technological University"],"affiliations":[{"raw_affiliation_string":"Nanyang Technological University, Singapore","institution_ids":["https://openalex.org/I172675005"]},{"raw_affiliation_string":"Nanyang Technological University","institution_ids":["https://openalex.org/I172675005"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100695040","display_name":"Wanqing Li","orcid":"https://orcid.org/0000-0002-4427-2687"},"institutions":[{"id":"https://openalex.org/I204824540","display_name":"University of Wollongong","ror":"https://ror.org/00jtmb277","country_code":"AU","type":"education","lineage":["https://openalex.org/I204824540"]}],"countries":["AU"],"is_corresponding":false,"raw_author_name":"Wanqing Li","raw_affiliation_strings":["University of Wollongong, Australia","University of Wollongong"],"affiliations":[{"raw_affiliation_string":"University of Wollongong, Australia","institution_ids":["https://openalex.org/I204824540"]},{"raw_affiliation_string":"University of Wollongong","institution_ids":["https://openalex.org/I204824540"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5080661503"],"corresponding_institution_ids":["https://openalex.org/I172675005"],"apc_list":null,"apc_paid":null,"fwci":1.016,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.8126532,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"417","issue":null,"first_page":"57","last_page":"62"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11904","display_name":"Spatial Cognition and Navigation","score":0.9959999918937683,"subfield":{"id":"https://openalex.org/subfields/2203","display_name":"Automotive 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/T11904","display_name":"Spatial Cognition and Navigation","score":0.9959999918937683,"subfield":{"id":"https://openalex.org/subfields/2203","display_name":"Automotive 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/T11398","display_name":"Hand Gesture Recognition Systems","score":0.9939000010490417,"subfield":{"id":"https://openalex.org/subfields/1709","display_name":"Human-Computer Interaction"},"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/T10812","display_name":"Human Pose and Action Recognition","score":0.9936000108718872,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/invariant","display_name":"Invariant (physics)","score":0.7137119174003601},{"id":"https://openalex.org/keywords/reflection","display_name":"Reflection (computer programming)","score":0.6814860701560974},{"id":"https://openalex.org/keywords/matching","display_name":"Matching (statistics)","score":0.569391131401062},{"id":"https://openalex.org/keywords/rotation","display_name":"Rotation (mathematics)","score":0.5500506162643433},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.5244484543800354},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5090376734733582},{"id":"https://openalex.org/keywords/moment","display_name":"Moment (physics)","score":0.4853462278842926},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.4825022220611572},{"id":"https://openalex.org/keywords/feature","display_name":"Feature (linguistics)","score":0.41276752948760986},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.39392316341400146},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3710714280605316},{"id":"https://openalex.org/keywords/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.36028000712394714},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.13002228736877441}],"concepts":[{"id":"https://openalex.org/C190470478","wikidata":"https://www.wikidata.org/wiki/Q2370229","display_name":"Invariant (physics)","level":2,"score":0.7137119174003601},{"id":"https://openalex.org/C65682993","wikidata":"https://www.wikidata.org/wiki/Q1056451","display_name":"Reflection (computer programming)","level":2,"score":0.6814860701560974},{"id":"https://openalex.org/C165064840","wikidata":"https://www.wikidata.org/wiki/Q1321061","display_name":"Matching (statistics)","level":2,"score":0.569391131401062},{"id":"https://openalex.org/C74050887","wikidata":"https://www.wikidata.org/wiki/Q848368","display_name":"Rotation (mathematics)","level":2,"score":0.5500506162643433},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5244484543800354},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5090376734733582},{"id":"https://openalex.org/C179254644","wikidata":"https://www.wikidata.org/wiki/Q13222844","display_name":"Moment (physics)","level":2,"score":0.4853462278842926},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.4825022220611572},{"id":"https://openalex.org/C2776401178","wikidata":"https://www.wikidata.org/wiki/Q12050496","display_name":"Feature (linguistics)","level":2,"score":0.41276752948760986},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.39392316341400146},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3710714280605316},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.36028000712394714},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.13002228736877441},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0},{"id":"https://openalex.org/C37914503","wikidata":"https://www.wikidata.org/wiki/Q156495","display_name":"Mathematical physics","level":1,"score":0.0},{"id":"https://openalex.org/C74650414","wikidata":"https://www.wikidata.org/wiki/Q11397","display_name":"Classical mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/cvprw.2011.5981785","is_oa":false,"landing_page_url":"https://doi.org/10.1109/cvprw.2011.5981785","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"CVPR 2011 WORKSHOPS","raw_type":"proceedings-article"},{"id":"pmh:oai:ro.uow.edu.au:infopapers-9303","is_oa":false,"landing_page_url":"https://ro.uow.edu.au/infopapers/1968","pdf_url":null,"source":{"id":"https://openalex.org/S4306400510","display_name":"Research Online (University of Wollongong)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I204824540","host_organization_name":"University of Wollongong","host_organization_lineage":["https://openalex.org/I204824540"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Faculty of Informatics - Papers (Archive)","raw_type":"presentation"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Reduced inequalities","id":"https://metadata.un.org/sdg/10","score":0.5899999737739563}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":25,"referenced_works":["https://openalex.org/W358380361","https://openalex.org/W1561952261","https://openalex.org/W1585193494","https://openalex.org/W1680579736","https://openalex.org/W2001450167","https://openalex.org/W2031984250","https://openalex.org/W2035972836","https://openalex.org/W2046193047","https://openalex.org/W2065855908","https://openalex.org/W2081667458","https://openalex.org/W2099789128","https://openalex.org/W2128978199","https://openalex.org/W2143629840","https://openalex.org/W2144380653","https://openalex.org/W2149937543","https://openalex.org/W2159654942","https://openalex.org/W2170873877","https://openalex.org/W3004239172","https://openalex.org/W3083161613","https://openalex.org/W3106490840","https://openalex.org/W3181590728","https://openalex.org/W6633448084","https://openalex.org/W6634887190","https://openalex.org/W6637453536","https://openalex.org/W6653596126"],"related_works":["https://openalex.org/W1972035260","https://openalex.org/W2371168111","https://openalex.org/W2494809169","https://openalex.org/W4301594054","https://openalex.org/W2794488505","https://openalex.org/W1576035430","https://openalex.org/W2390392971","https://openalex.org/W3125889879","https://openalex.org/W3040437776","https://openalex.org/W3124422538"],"abstract_inverted_index":{"Human":[0],"activity":[1,130],"understanding":[2,129],"from":[3,8,82],"three-dimensional":[4],"data,":[5],"such":[6,56,68],"as":[7,57,69],"depth":[9],"cameras,":[10],"requires":[11],"viewpoint-invariant":[12],"matching.":[13,71],"In":[14],"this":[15],"paper,":[16],"we":[17],"propose":[18],"a":[19],"new":[20],"method":[21],"of":[22,73,109,113],"constructing":[23],"invariants":[24,51,121],"that":[25,38,96],"allows":[26],"distinction":[27,98],"between":[28,99],"isometries":[29],"based":[30],"on":[31,65],"rotation,":[32],"which":[33,41,84],"preserve":[34],"handedness,":[35],"and":[36,44,101],"those":[37,74],"involve":[39],"reflection,":[40],"reverse":[42],"right":[43,91],"left":[45,89],"hands.":[46],"The":[47],"state-of-the-art":[48],"in":[49,105],"viewpoint":[50,120],"uses":[52],"either":[53],"global":[54],"descriptors":[55],"moments":[58],"or":[59,63],"spherical":[60],"harmonic":[61],"magnitudes,":[62],"relies":[64],"local":[66],"methods":[67,75],"feature":[70],"None":[72],"are":[76],"able":[77],"to":[78,87,125],"easily":[79],"distinguish":[80],"rotations":[81],"reflections,":[83],"is":[85,103],"essential":[86],"understand":[88],"vs":[90],"handed":[92],"gestures.":[93],"We":[94,116],"show":[95,117],"the":[97,106],"rotation":[100],"reflection":[102],"contained":[104],"imaginary":[107],"part":[108],"certain":[110],"weighted":[111],"inner-products":[112],"moment":[114],"vectors.":[115],"how":[118],"reflection-sensing":[119],"may":[122],"be":[123],"applied":[124],"depth-map":[126],"data":[127],"for":[128],"data.":[131]},"counts_by_year":[{"year":2020,"cited_by_count":1},{"year":2012,"cited_by_count":2}],"updated_date":"2026-04-04T16:13:02.066488","created_date":"2025-10-10T00:00:00"}
