{"id":"https://openalex.org/W1983712559","doi":"https://doi.org/10.1109/icra.2012.6224777","title":"Sparse representation of point trajectories for action classification","display_name":"Sparse representation of point trajectories for action classification","publication_year":2012,"publication_date":"2012-05-01","ids":{"openalex":"https://openalex.org/W1983712559","doi":"https://doi.org/10.1109/icra.2012.6224777","mag":"1983712559"},"language":"en","primary_location":{"id":"doi:10.1109/icra.2012.6224777","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icra.2012.6224777","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2012 IEEE International Conference on Robotics and Automation","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/A5013181069","display_name":"Ravishankar Sivalingam","orcid":null},"institutions":[{"id":"https://openalex.org/I4210101327","display_name":"Twin Cities Orthopedics","ror":"https://ror.org/01en4s460","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210101327"]},{"id":"https://openalex.org/I130238516","display_name":"University of Minnesota","ror":"https://ror.org/017zqws13","country_code":"US","type":"education","lineage":["https://openalex.org/I130238516"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Ravishankar Sivalingam","raw_affiliation_strings":["Department of Computer Science and Engineering, University of Minnesota, Twin city, USA","Department of Computer Science & Engineering, University of Minnesota, Twin Cities, USA"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science and Engineering, University of Minnesota, Twin city, USA","institution_ids":["https://openalex.org/I130238516"]},{"raw_affiliation_string":"Department of Computer Science & Engineering, University of Minnesota, Twin Cities, USA","institution_ids":["https://openalex.org/I4210101327","https://openalex.org/I130238516"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5076107557","display_name":"Guruprasad Somasundaram","orcid":"https://orcid.org/0009-0006-8190-0255"},"institutions":[{"id":"https://openalex.org/I130238516","display_name":"University of Minnesota","ror":"https://ror.org/017zqws13","country_code":"US","type":"education","lineage":["https://openalex.org/I130238516"]},{"id":"https://openalex.org/I4210101327","display_name":"Twin Cities Orthopedics","ror":"https://ror.org/01en4s460","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210101327"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Guruprasad Somasundaram","raw_affiliation_strings":["Department of Computer Science and Engineering, University of Minnesota, Twin city, USA","Department of Computer Science & Engineering, University of Minnesota, Twin Cities, USA"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science and Engineering, University of Minnesota, Twin city, USA","institution_ids":["https://openalex.org/I130238516"]},{"raw_affiliation_string":"Department of Computer Science & Engineering, University of Minnesota, Twin Cities, USA","institution_ids":["https://openalex.org/I4210101327","https://openalex.org/I130238516"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5034392344","display_name":"Vineet Bhatawadekar","orcid":null},"institutions":[{"id":"https://openalex.org/I4210101327","display_name":"Twin Cities Orthopedics","ror":"https://ror.org/01en4s460","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210101327"]},{"id":"https://openalex.org/I130238516","display_name":"University of Minnesota","ror":"https://ror.org/017zqws13","country_code":"US","type":"education","lineage":["https://openalex.org/I130238516"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Vineet Bhatawadekar","raw_affiliation_strings":["Department of Computer Science and Engineering, University of Minnesota, Twin city, USA","Department of Computer Science & Engineering, University of Minnesota, Twin Cities, USA"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science and Engineering, University of Minnesota, Twin city, USA","institution_ids":["https://openalex.org/I130238516"]},{"raw_affiliation_string":"Department of Computer Science & Engineering, University of Minnesota, Twin Cities, USA","institution_ids":["https://openalex.org/I4210101327","https://openalex.org/I130238516"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5081890915","display_name":"Vassilios Morellas","orcid":"https://orcid.org/0000-0002-9198-8442"},"institutions":[{"id":"https://openalex.org/I130238516","display_name":"University of Minnesota","ror":"https://ror.org/017zqws13","country_code":"US","type":"education","lineage":["https://openalex.org/I130238516"]},{"id":"https://openalex.org/I4210101327","display_name":"Twin Cities Orthopedics","ror":"https://ror.org/01en4s460","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210101327"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Vassilios Morellas","raw_affiliation_strings":["Department of Computer Science and Engineering, University of Minnesota, Twin city, USA","Department of Computer Science & Engineering, University of Minnesota, Twin Cities, USA"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science and Engineering, University of Minnesota, Twin city, USA","institution_ids":["https://openalex.org/I130238516"]},{"raw_affiliation_string":"Department of Computer Science & Engineering, University of Minnesota, Twin Cities, USA","institution_ids":["https://openalex.org/I4210101327","https://openalex.org/I130238516"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5109170958","display_name":"Nikolaos Papanikolopoulos","orcid":null},"institutions":[{"id":"https://openalex.org/I4210101327","display_name":"Twin Cities Orthopedics","ror":"https://ror.org/01en4s460","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210101327"]},{"id":"https://openalex.org/I130238516","display_name":"University of Minnesota","ror":"https://ror.org/017zqws13","country_code":"US","type":"education","lineage":["https://openalex.org/I130238516"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Nikolaos Papanikolopoulos","raw_affiliation_strings":["Department of Computer Science and Engineering, University of Minnesota, Twin city, USA","Department of Computer Science & Engineering, University of Minnesota, Twin Cities, USA"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science and Engineering, University of Minnesota, Twin city, USA","institution_ids":["https://openalex.org/I130238516"]},{"raw_affiliation_string":"Department of Computer Science & Engineering, University of Minnesota, Twin Cities, USA","institution_ids":["https://openalex.org/I4210101327","https://openalex.org/I130238516"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5013181069"],"corresponding_institution_ids":["https://openalex.org/I130238516","https://openalex.org/I4210101327"],"apc_list":null,"apc_paid":null,"fwci":0.5491,"has_fulltext":false,"cited_by_count":6,"citation_normalized_percentile":{"value":0.66215367,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"2922","issue":null,"first_page":"3601","last_page":"3606"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10812","display_name":"Human Pose and Action Recognition","score":0.9995999932289124,"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":0.9995999932289124,"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":0.9980000257492065,"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/T12740","display_name":"Gait Recognition and Analysis","score":0.9973999857902527,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical 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/computer-science","display_name":"Computer science","score":0.7283069491386414},{"id":"https://openalex.org/keywords/sparse-approximation","display_name":"Sparse approximation","score":0.7084767818450928},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.6724627614021301},{"id":"https://openalex.org/keywords/representation","display_name":"Representation (politics)","score":0.6211334466934204},{"id":"https://openalex.org/keywords/motion-capture","display_name":"Motion capture","score":0.6090083122253418},{"id":"https://openalex.org/keywords/matching-pursuit","display_name":"Matching pursuit","score":0.6025081872940063},{"id":"https://openalex.org/keywords/gesture","display_name":"Gesture","score":0.5606167912483215},{"id":"https://openalex.org/keywords/motion","display_name":"Motion (physics)","score":0.5526590347290039},{"id":"https://openalex.org/keywords/trajectory","display_name":"Trajectory","score":0.5166802406311035},{"id":"https://openalex.org/keywords/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.5095263123512268},{"id":"https://openalex.org/keywords/gesture-recognition","display_name":"Gesture recognition","score":0.47295495867729187},{"id":"https://openalex.org/keywords/covariance","display_name":"Covariance","score":0.4668614864349365},{"id":"https://openalex.org/keywords/hidden-markov-model","display_name":"Hidden Markov model","score":0.46452295780181885},{"id":"https://openalex.org/keywords/point","display_name":"Point (geometry)","score":0.454422265291214},{"id":"https://openalex.org/keywords/matching","display_name":"Matching (statistics)","score":0.4126431941986084},{"id":"https://openalex.org/keywords/action","display_name":"Action (physics)","score":0.4120088517665863},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.3480439782142639},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.17125383019447327}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7283069491386414},{"id":"https://openalex.org/C124066611","wikidata":"https://www.wikidata.org/wiki/Q28684319","display_name":"Sparse approximation","level":2,"score":0.7084767818450928},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.6724627614021301},{"id":"https://openalex.org/C2776359362","wikidata":"https://www.wikidata.org/wiki/Q2145286","display_name":"Representation (politics)","level":3,"score":0.6211334466934204},{"id":"https://openalex.org/C48007421","wikidata":"https://www.wikidata.org/wiki/Q676252","display_name":"Motion capture","level":3,"score":0.6090083122253418},{"id":"https://openalex.org/C156872377","wikidata":"https://www.wikidata.org/wiki/Q6786281","display_name":"Matching pursuit","level":3,"score":0.6025081872940063},{"id":"https://openalex.org/C207347870","wikidata":"https://www.wikidata.org/wiki/Q371174","display_name":"Gesture","level":2,"score":0.5606167912483215},{"id":"https://openalex.org/C104114177","wikidata":"https://www.wikidata.org/wiki/Q79782","display_name":"Motion (physics)","level":2,"score":0.5526590347290039},{"id":"https://openalex.org/C13662910","wikidata":"https://www.wikidata.org/wiki/Q193139","display_name":"Trajectory","level":2,"score":0.5166802406311035},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.5095263123512268},{"id":"https://openalex.org/C159437735","wikidata":"https://www.wikidata.org/wiki/Q1519524","display_name":"Gesture recognition","level":3,"score":0.47295495867729187},{"id":"https://openalex.org/C178650346","wikidata":"https://www.wikidata.org/wiki/Q201984","display_name":"Covariance","level":2,"score":0.4668614864349365},{"id":"https://openalex.org/C23224414","wikidata":"https://www.wikidata.org/wiki/Q176769","display_name":"Hidden Markov model","level":2,"score":0.46452295780181885},{"id":"https://openalex.org/C28719098","wikidata":"https://www.wikidata.org/wiki/Q44946","display_name":"Point (geometry)","level":2,"score":0.454422265291214},{"id":"https://openalex.org/C165064840","wikidata":"https://www.wikidata.org/wiki/Q1321061","display_name":"Matching (statistics)","level":2,"score":0.4126431941986084},{"id":"https://openalex.org/C2780791683","wikidata":"https://www.wikidata.org/wiki/Q846785","display_name":"Action (physics)","level":2,"score":0.4120088517665863},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.3480439782142639},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.17125383019447327},{"id":"https://openalex.org/C94625758","wikidata":"https://www.wikidata.org/wiki/Q7163","display_name":"Politics","level":2,"score":0.0},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.0},{"id":"https://openalex.org/C124851039","wikidata":"https://www.wikidata.org/wiki/Q2665459","display_name":"Compressed sensing","level":2,"score":0.0},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.0},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","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/C17744445","wikidata":"https://www.wikidata.org/wiki/Q36442","display_name":"Political science","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/icra.2012.6224777","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icra.2012.6224777","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2012 IEEE International Conference on Robotics and Automation","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320338281","display_name":"Army Research Office","ror":"https://ror.org/05epdh915"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":40,"referenced_works":["https://openalex.org/W938745294","https://openalex.org/W1519164585","https://openalex.org/W1549083695","https://openalex.org/W1780510770","https://openalex.org/W1823409095","https://openalex.org/W1965502156","https://openalex.org/W1973366456","https://openalex.org/W1976748406","https://openalex.org/W1983705368","https://openalex.org/W1984424187","https://openalex.org/W1997500560","https://openalex.org/W2030191558","https://openalex.org/W2038545421","https://openalex.org/W2048192550","https://openalex.org/W2055767715","https://openalex.org/W2106996050","https://openalex.org/W2109921208","https://openalex.org/W2110516442","https://openalex.org/W2115549875","https://openalex.org/W2116931983","https://openalex.org/W2122191522","https://openalex.org/W2125389556","https://openalex.org/W2125854396","https://openalex.org/W2127271355","https://openalex.org/W2128716185","https://openalex.org/W2129812935","https://openalex.org/W2138424157","https://openalex.org/W2151693816","https://openalex.org/W2160547390","https://openalex.org/W2165102974","https://openalex.org/W2167467889","https://openalex.org/W2169718460","https://openalex.org/W2301673185","https://openalex.org/W2401378045","https://openalex.org/W3120740533","https://openalex.org/W4239657488","https://openalex.org/W4285719527","https://openalex.org/W6638122284","https://openalex.org/W6658188940","https://openalex.org/W6698087124"],"related_works":["https://openalex.org/W2011611369","https://openalex.org/W4297791310","https://openalex.org/W4245251483","https://openalex.org/W2116148865","https://openalex.org/W2028966255","https://openalex.org/W4372266926","https://openalex.org/W2077377051","https://openalex.org/W1994032303","https://openalex.org/W2366556501","https://openalex.org/W2029299808"],"abstract_inverted_index":{"Action":[0],"classification":[1,10],"is":[2,11],"an":[3,12],"important":[4],"component":[5],"of":[6,15,40,80],"human-computer":[7],"interaction.":[8],"Trajectory":[9],"effective":[13],"way":[14],"performing":[16],"action":[17],"recognition":[18],"with":[19],"significant":[20],"success":[21],"reported":[22],"in":[23],"the":[24,37,41,50,59,65,73,78,88],"literature.":[25],"We":[26,76],"compare":[27],"two":[28],"different":[29],"representation":[30,46],"schemes,":[31],"raw":[32],"multivariate":[33],"time-series":[34],"data":[35,109],"and":[36,43,64,67,93],"covariance":[38],"descriptors":[39],"trajectories,":[42],"apply":[44],"sparse":[45,56],"techniques":[47],"for":[48],"classifying":[49],"various":[51],"actions.":[52],"The":[53],"features":[54],"are":[55,69],"coded":[57],"using":[58,99],"Orthogonal":[60],"Matching":[61],"Pursuit":[62],"algorithm,":[63],"gestures":[66],"actions":[68],"classified":[70],"based":[71],"on":[72,83],"reconstruction":[74],"residuals.":[75],"demonstrate":[77],"performance":[79],"our":[81],"approach":[82],"standardized":[84],"datasets":[85],"such":[86],"as":[87,104,106],"Australian":[89],"Sign":[90],"Language":[91],"(AusLan)":[92],"UCF":[94],"Motion":[95],"Capture":[96],"datasets,":[97],"collected":[98],"high-quality":[100],"motion":[101,107],"capture":[102,108],"systems,":[103],"well":[105],"obtained":[110],"from":[111],"a":[112],"Microsoft":[113],"Kinect":[114],"sensor.":[115]},"counts_by_year":[{"year":2021,"cited_by_count":1},{"year":2017,"cited_by_count":2},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}