{"id":"https://openalex.org/W2081314772","doi":"https://doi.org/10.1109/cvpr.2011.5995707","title":"Learning context for collective activity recognition","display_name":"Learning context for collective activity recognition","publication_year":2011,"publication_date":"2011-06-01","ids":{"openalex":"https://openalex.org/W2081314772","doi":"https://doi.org/10.1109/cvpr.2011.5995707","mag":"2081314772"},"language":"en","primary_location":{"id":"doi:10.1109/cvpr.2011.5995707","is_oa":false,"landing_page_url":"https://doi.org/10.1109/cvpr.2011.5995707","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"CVPR 2011","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/A5051079460","display_name":"Wongun Choi","orcid":null},"institutions":[{"id":"https://openalex.org/I27837315","display_name":"University of Michigan\u2013Ann Arbor","ror":"https://ror.org/00jmfr291","country_code":"US","type":"education","lineage":["https://openalex.org/I27837315"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Wongun Choi","raw_affiliation_strings":["Department of Electrical and Computer Engineering, University of Michigan, Ann Arbor, MI, USA","Dept. of Electrical and Computer Engineering, University of Michigan 1301 Beal Avenue, Ann Arbor, MI 48109-2122"],"affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, University of Michigan, Ann Arbor, MI, USA","institution_ids":["https://openalex.org/I27837315"]},{"raw_affiliation_string":"Dept. of Electrical and Computer Engineering, University of Michigan 1301 Beal Avenue, Ann Arbor, MI 48109-2122","institution_ids":["https://openalex.org/I27837315"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5032641896","display_name":"Khuram Shahid","orcid":null},"institutions":[{"id":"https://openalex.org/I27837315","display_name":"University of Michigan\u2013Ann Arbor","ror":"https://ror.org/00jmfr291","country_code":"US","type":"education","lineage":["https://openalex.org/I27837315"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Khuram Shahid","raw_affiliation_strings":["Department of Electrical and Computer Engineering, University of Michigan, Ann Arbor, MI, USA","Dept. of Electrical and Computer Engineering, University of Michigan 1301 Beal Avenue, Ann Arbor, MI 48109-2122"],"affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, University of Michigan, Ann Arbor, MI, USA","institution_ids":["https://openalex.org/I27837315"]},{"raw_affiliation_string":"Dept. of Electrical and Computer Engineering, University of Michigan 1301 Beal Avenue, Ann Arbor, MI 48109-2122","institution_ids":["https://openalex.org/I27837315"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5042646536","display_name":"Silvio Savarese","orcid":null},"institutions":[{"id":"https://openalex.org/I27837315","display_name":"University of Michigan\u2013Ann Arbor","ror":"https://ror.org/00jmfr291","country_code":"US","type":"education","lineage":["https://openalex.org/I27837315"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Silvio Savarese","raw_affiliation_strings":["Department of Electrical and Computer Engineering, University of Michigan, Ann Arbor, MI, USA","Dept. of Electrical and Computer Engineering, University of Michigan 1301 Beal Avenue, Ann Arbor, MI 48109-2122"],"affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, University of Michigan, Ann Arbor, MI, USA","institution_ids":["https://openalex.org/I27837315"]},{"raw_affiliation_string":"Dept. of Electrical and Computer Engineering, University of Michigan 1301 Beal Avenue, Ann Arbor, MI 48109-2122","institution_ids":["https://openalex.org/I27837315"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5051079460"],"corresponding_institution_ids":["https://openalex.org/I27837315"],"apc_list":null,"apc_paid":null,"fwci":20.2235,"has_fulltext":false,"cited_by_count":248,"citation_normalized_percentile":{"value":0.99587093,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":96,"max":100},"biblio":{"volume":null,"issue":null,"first_page":"3273","last_page":"3280"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10812","display_name":"Human Pose and Action Recognition","score":0.9993000030517578,"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"}},"topics":[{"id":"https://openalex.org/T10812","display_name":"Human Pose and Action Recognition","score":0.9993000030517578,"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/T10444","display_name":"Context-Aware Activity Recognition Systems","score":0.9958000183105469,"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/T11398","display_name":"Hand Gesture Recognition Systems","score":0.9901000261306763,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7165735363960266},{"id":"https://openalex.org/keywords/context","display_name":"Context (archaeology)","score":0.5766469836235046},{"id":"https://openalex.org/keywords/human\u2013computer-interaction","display_name":"Human\u2013computer interaction","score":0.39579105377197266},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.33653420209884644},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.07801443338394165}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7165735363960266},{"id":"https://openalex.org/C2779343474","wikidata":"https://www.wikidata.org/wiki/Q3109175","display_name":"Context (archaeology)","level":2,"score":0.5766469836235046},{"id":"https://openalex.org/C107457646","wikidata":"https://www.wikidata.org/wiki/Q207434","display_name":"Human\u2013computer interaction","level":1,"score":0.39579105377197266},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.33653420209884644},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.07801443338394165},{"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/cvpr.2011.5995707","is_oa":false,"landing_page_url":"https://doi.org/10.1109/cvpr.2011.5995707","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"CVPR 2011","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Reduced inequalities","id":"https://metadata.un.org/sdg/10","score":0.699999988079071}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":35,"referenced_works":["https://openalex.org/W1587992356","https://openalex.org/W1598578845","https://openalex.org/W1878940107","https://openalex.org/W1964443764","https://openalex.org/W2010399676","https://openalex.org/W2022699039","https://openalex.org/W2028172653","https://openalex.org/W2053619738","https://openalex.org/W2057175746","https://openalex.org/W2104978738","https://openalex.org/W2111411921","https://openalex.org/W2114361838","https://openalex.org/W2120419212","https://openalex.org/W2127784071","https://openalex.org/W2138232383","https://openalex.org/W2148596671","https://openalex.org/W2149126415","https://openalex.org/W2149613906","https://openalex.org/W2150298366","https://openalex.org/W2155268664","https://openalex.org/W2158169396","https://openalex.org/W2161612652","https://openalex.org/W2161969291","https://openalex.org/W2162915993","https://openalex.org/W2163292664","https://openalex.org/W2165095705","https://openalex.org/W2532516272","https://openalex.org/W2533739470","https://openalex.org/W2534527426","https://openalex.org/W2535410496","https://openalex.org/W4236055315","https://openalex.org/W6635173450","https://openalex.org/W6664172992","https://openalex.org/W6677137762","https://openalex.org/W6683492740"],"related_works":["https://openalex.org/W4391375266","https://openalex.org/W2899084033","https://openalex.org/W2748952813","https://openalex.org/W2390279801","https://openalex.org/W4391913857","https://openalex.org/W2358668433","https://openalex.org/W4396701345","https://openalex.org/W2376932109","https://openalex.org/W2001405890","https://openalex.org/W4396696052"],"abstract_inverted_index":{"In":[0],"this":[1],"paper":[2],"we":[3,52],"present":[4],"a":[5,47,64,76,118,126,153],"framework":[6,151],"for":[7,67,93,120],"the":[8,22,59,89,102,112,133,140,144,149],"recognition":[9],"of":[10,24,27,41,105,148,155],"collective":[11,15,42,56,137],"human":[12],"activities.":[13],"A":[14],"activity":[16],"is":[17,73],"defined":[18],"or":[19,49],"reinforced":[20],"by":[21,114],"existence":[23],"coherent":[25,36],"behavior":[26,37],"individuals":[28],"in":[29,46,139,152],"time":[30],"and":[31,62,135,146,157],"space.":[32],"We":[33,124,142],"call":[34],"such":[35],"`Crowd":[38],"Context'.":[39],"Examples":[40],"activities":[43,57,138],"are":[44],"\u201cqueuing":[45],"line\u201d":[48],"\u201ctalking\u201d.":[50],"Following,":[51],"propose":[53],"to":[54,87,110,131],"recognize":[55],"using":[58],"crowd":[60,122],"context":[61],"introduce":[63],"new":[65],"scheme":[66,72],"learning":[68],"it":[69],"automatically.":[70],"Our":[71],"constructed":[74],"upon":[75],"Random":[77,129],"Forest":[78],"structure":[79],"which":[80,109],"randomly":[81],"samples":[82],"variable":[83],"volume":[84],"spatio-temporal":[85,106],"regions":[86],"pick":[88],"most":[90],"discriminating":[91],"attributes":[92],"classification.":[94],"Unlike":[95],"previous":[96],"approaches,":[97],"our":[98,160],"algorithm":[99],"automatically":[100],"finds":[101],"optimal":[103],"configuration":[104],"bins,":[107],"over":[108],"sample":[111],"evidence,":[113],"randomization.":[115],"This":[116],"enables":[117],"methodology":[119],"modeling":[121],"context.":[123],"employ":[125],"3D":[127],"Markov":[128],"Field":[130],"regularize":[132],"classification":[134,166],"localize":[136],"scene.":[141],"demonstrate":[143],"flexibility":[145],"scalability":[147],"proposed":[150],"number":[154],"experiments":[156],"show":[158],"that":[159],"method":[161],"outperforms":[162],"state-of-the":[163],"art":[164],"action":[165],"techniques.":[167]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":6},{"year":2024,"cited_by_count":7},{"year":2023,"cited_by_count":13},{"year":2022,"cited_by_count":11},{"year":2021,"cited_by_count":22},{"year":2020,"cited_by_count":18},{"year":2019,"cited_by_count":16},{"year":2018,"cited_by_count":18},{"year":2017,"cited_by_count":13},{"year":2016,"cited_by_count":21},{"year":2015,"cited_by_count":25},{"year":2014,"cited_by_count":35},{"year":2013,"cited_by_count":21},{"year":2012,"cited_by_count":20}],"updated_date":"2026-04-03T22:45:19.894376","created_date":"2025-10-10T00:00:00"}
