{"id":"https://openalex.org/W2421575624","doi":"https://doi.org/10.1109/ncvpripg.2015.7490009","title":"Lip contour detection for estimation of mouth opening area","display_name":"Lip contour detection for estimation of mouth opening area","publication_year":2015,"publication_date":"2015-12-01","ids":{"openalex":"https://openalex.org/W2421575624","doi":"https://doi.org/10.1109/ncvpripg.2015.7490009","mag":"2421575624"},"language":"en","primary_location":{"id":"doi:10.1109/ncvpripg.2015.7490009","is_oa":false,"landing_page_url":"https://doi.org/10.1109/ncvpripg.2015.7490009","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2015 Fifth National Conference on Computer Vision, Pattern Recognition, Image Processing and Graphics (NCVPRIPG)","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/A5101716758","display_name":"Shreyansh Jain","orcid":"https://orcid.org/0000-0002-6370-7623"},"institutions":[{"id":"https://openalex.org/I162827531","display_name":"Indian Institute of Technology Bombay","ror":"https://ror.org/02qyf5152","country_code":"IN","type":"education","lineage":["https://openalex.org/I162827531"]}],"countries":["IN"],"is_corresponding":true,"raw_author_name":"Shreyansh Jain","raw_affiliation_strings":["Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India","institution_ids":["https://openalex.org/I162827531"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101429619","display_name":"Prem C. Pandey","orcid":"https://orcid.org/0000-0001-6280-6462"},"institutions":[{"id":"https://openalex.org/I162827531","display_name":"Indian Institute of Technology Bombay","ror":"https://ror.org/02qyf5152","country_code":"IN","type":"education","lineage":["https://openalex.org/I162827531"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"Prem C. Pandey","raw_affiliation_strings":["Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India","institution_ids":["https://openalex.org/I162827531"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5103090020","display_name":"Rajbabu Velmurugan","orcid":"https://orcid.org/0000-0002-3511-1806"},"institutions":[{"id":"https://openalex.org/I162827531","display_name":"Indian Institute of Technology Bombay","ror":"https://ror.org/02qyf5152","country_code":"IN","type":"education","lineage":["https://openalex.org/I162827531"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"Rajbabu Velmurugan","raw_affiliation_strings":["Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India","institution_ids":["https://openalex.org/I162827531"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5101716758"],"corresponding_institution_ids":["https://openalex.org/I162827531"],"apc_list":null,"apc_paid":null,"fwci":1.08874389,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.81163902,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"4"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10860","display_name":"Speech and Audio Processing","score":0.9987000226974487,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"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/T10860","display_name":"Speech and Audio Processing","score":0.9987000226974487,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"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/T11448","display_name":"Face recognition and analysis","score":0.984499990940094,"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":0.9455999732017517,"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/artificial-intelligence","display_name":"Artificial intelligence","score":0.6276786923408508},{"id":"https://openalex.org/keywords/vocal-tract","display_name":"Vocal tract","score":0.6143971681594849},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.600365936756134},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.4988536834716797},{"id":"https://openalex.org/keywords/tongue","display_name":"Tongue","score":0.48471546173095703},{"id":"https://openalex.org/keywords/hue","display_name":"Hue","score":0.482428640127182},{"id":"https://openalex.org/keywords/face","display_name":"Face (sociological concept)","score":0.47815021872520447},{"id":"https://openalex.org/keywords/template-matching","display_name":"Template matching","score":0.44737565517425537},{"id":"https://openalex.org/keywords/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.3979107737541199},{"id":"https://openalex.org/keywords/speech-recognition","display_name":"Speech recognition","score":0.3884236514568329},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.3450815677642822},{"id":"https://openalex.org/keywords/image","display_name":"Image (mathematics)","score":0.0889122486114502}],"concepts":[{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.6276786923408508},{"id":"https://openalex.org/C47401133","wikidata":"https://www.wikidata.org/wiki/Q748953","display_name":"Vocal tract","level":2,"score":0.6143971681594849},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.600365936756134},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.4988536834716797},{"id":"https://openalex.org/C2779744641","wikidata":"https://www.wikidata.org/wiki/Q9614","display_name":"Tongue","level":2,"score":0.48471546173095703},{"id":"https://openalex.org/C126537357","wikidata":"https://www.wikidata.org/wiki/Q372948","display_name":"Hue","level":2,"score":0.482428640127182},{"id":"https://openalex.org/C2779304628","wikidata":"https://www.wikidata.org/wiki/Q3503480","display_name":"Face (sociological concept)","level":2,"score":0.47815021872520447},{"id":"https://openalex.org/C158096908","wikidata":"https://www.wikidata.org/wiki/Q3983303","display_name":"Template matching","level":3,"score":0.44737565517425537},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.3979107737541199},{"id":"https://openalex.org/C28490314","wikidata":"https://www.wikidata.org/wiki/Q189436","display_name":"Speech recognition","level":1,"score":0.3884236514568329},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3450815677642822},{"id":"https://openalex.org/C115961682","wikidata":"https://www.wikidata.org/wiki/Q860623","display_name":"Image (mathematics)","level":2,"score":0.0889122486114502},{"id":"https://openalex.org/C144024400","wikidata":"https://www.wikidata.org/wiki/Q21201","display_name":"Sociology","level":0,"score":0.0},{"id":"https://openalex.org/C36289849","wikidata":"https://www.wikidata.org/wiki/Q34749","display_name":"Social science","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/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/ncvpripg.2015.7490009","is_oa":false,"landing_page_url":"https://doi.org/10.1109/ncvpripg.2015.7490009","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2015 Fifth National Conference on Computer Vision, Pattern Recognition, Image Processing and Graphics (NCVPRIPG)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Quality Education","id":"https://metadata.un.org/sdg/4","score":0.5}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":12,"referenced_works":["https://openalex.org/W1545231227","https://openalex.org/W1559276497","https://openalex.org/W1984001678","https://openalex.org/W2013139082","https://openalex.org/W2029312756","https://openalex.org/W2051735894","https://openalex.org/W2066381494","https://openalex.org/W2106309274","https://openalex.org/W2166221666","https://openalex.org/W2172001082","https://openalex.org/W3097096317","https://openalex.org/W6632541059"],"related_works":["https://openalex.org/W4320518079","https://openalex.org/W4386771591","https://openalex.org/W2079194684","https://openalex.org/W1978533094","https://openalex.org/W2039822179","https://openalex.org/W2617269004","https://openalex.org/W35292311","https://openalex.org/W2972873516","https://openalex.org/W1748856376","https://openalex.org/W2803166627"],"abstract_inverted_index":{"In":[0],"speech":[1,17,29,46,90],"training":[2],"aids":[3],"for":[4,94,109,144,158,198],"providing":[5],"visual":[6],"feedback":[7],"of":[8,27,64,86,96,116,149,171,220,245],"the":[9,28,37,51,65,69,78,83,111,141,150,166,172,182,185,199,207,221,231],"articulatory":[10],"efforts,":[11],"time-varying":[12],"vocal":[13,53],"tract":[14,54],"shape":[15],"during":[16,45,89],"production":[18,47],"is":[19,107,152,192,195,237],"generally":[20],"obtained":[21],"by":[22,61,76,114,122,154,240],"linear":[23],"prediction":[24],"(LP)":[25],"analysis":[26],"signal":[30],"and":[31,104,118,131,160,201,224,235,243],"assuming":[32],"a":[33,41,127,188],"constant":[34],"area":[35,63,72],"at":[36],"glottis":[38],"end":[39],"as":[40,68],"reference.":[42,70],"Its":[43],"variation":[44],"causes":[48],"errors":[49,112,167],"in":[50,184,229],"estimated":[52,75],"shape.":[55],"The":[56,211],"problem":[57],"can":[58,73],"be":[59,74,227],"overcome":[60],"using":[62,126],"mouth":[66,128,146,208,222,232],"opening":[67,209,223,233],"This":[71],"detecting":[77],"inner":[79,97,145],"lip":[80,98,133,162,203],"contour":[81,134],"from":[82,181],"video":[84],"recording":[85],"speaker's":[87],"face":[88],"utterance.":[91],"A":[92],"technique":[93,191,212],"detection":[95,121,129,135],"contour,":[99],"based":[100],"on":[101],"color":[102,156,186],"transformation":[103],"template":[105,189],"matching,":[106],"presented":[108],"reducing":[110,165],"caused":[113],"presence":[115,244],"teeth":[117,151],"tongue.":[119],"Face":[120],"Viola-Jones":[123],"algorithm,":[124],"localization":[125],"technique,":[130],"outer":[132],"are":[136],"used":[137,196],"to":[138,169,205,226],"narrow":[139],"down":[140],"search":[142],"region":[143],"opening.":[147],"Presence":[148],"masked":[153],"separate":[155],"transformations":[157],"upper":[159,200],"lower":[161,202],"segments.":[163],"For":[164],"due":[168],"visibility":[170],"tongue,":[173],"which":[174],"may":[175],"not":[176,238],"have":[177],"any":[178],"significant":[179],"separation":[180],"lips":[183],"space,":[187],"matching":[190],"employed.":[193],"It":[194],"separately":[197],"segments":[204],"obtain":[206],"area.":[210],"has":[213],"been":[214],"validated":[215],"against":[216],"graphically":[217],"measured":[218],"values":[219],"found":[225],"successful":[228],"estimating":[230],"area,":[234],"it":[236],"affected":[239],"skin":[241],"hue":[242],"teeth.":[246]},"counts_by_year":[{"year":2020,"cited_by_count":1},{"year":2018,"cited_by_count":2},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}