Face detection - Wikipedia

Face detection is a computer technology being used in a variety of applications that identifies human faces in digital images. ... Face detection also refers to ... Facedetection FromWikipedia,thefreeencyclopedia Jumptonavigation Jumptosearch Thisarticleisaboutfacedetection.Forfacerecognitionsystems,seeFacialrecognitionsystem.Forhumanfaceperception,seeFaceperception. AutomaticfacedetectionwithOpenCV Facedetectionisacomputertechnologybeingusedinavarietyofapplicationsthatidentifieshumanfacesindigitalimages.[1]Facedetectionalsoreferstothepsychologicalprocessbywhichhumanslocateandattendtofacesinavisualscene.[2] Contents 1Definitionandrelatedalgorithms 2Applications 2.1Facialmotioncapture 2.2Facialrecognition 2.3Photography 2.4Marketing 2.5EmotionalInference 2.6LipReading 3Seealso 4References 5Externallinks Definitionandrelatedalgorithms[edit] Facedetectioncanberegardedasaspecificcaseofobject-classdetection.Inobject-classdetection,thetaskistofindthelocationsandsizesofallobjectsinanimagethatbelongtoagivenclass.Examplesincludeuppertorsos,pedestrians,andcars. Facedetectionsimplyanswerstwoquestion,1.arethereanyhumanfacesinthecollectedimagesorvideo?2.whereisthelocated? Face-detectionalgorithmsfocusonthedetectionoffrontalhumanfaces.Itisanalogoustoimagedetectioninwhichtheimageofapersonismatchedbitbybit.Imagematcheswiththeimagestoresindatabase.Anyfacialfeaturechangesinthedatabasewillinvalidatethematchingprocess.[3] Areliableface-detectionapproachbasedonthegeneticalgorithmandtheeigen-face[4]technique: Firstly,thepossiblehumaneyeregionsaredetectedbytestingallthevalleyregionsinthegray-levelimage.Thenthegeneticalgorithmisusedtogenerateallthepossiblefaceregionswhichincludetheeyebrows,theiris,thenostrilandthemouthcorners.[3] Eachpossiblefacecandidateisnormalizedtoreduceboththelightingeffect,whichiscausedbyunevenillumination;andtheshirringeffect,whichisduetoheadmovement.Thefitnessvalueofeachcandidateismeasuredbasedonitsprojectionontheeigen-faces.Afteranumberofiterations,allthefacecandidateswithahighfitnessvalueareselectedforfurtherverification.Atthisstage,thefacesymmetryismeasuredandtheexistenceofthedifferentfacialfeaturesisverifiedforeachfacecandidate.[5] Applications[edit] Facialmotioncapture[edit] Mainarticle:Facialmotioncapture Facialrecognition[edit] Mainarticle:Facialrecognitionsystem Facedetectionisusedinbiometrics,oftenasapartof(ortogetherwith)afacialrecognitionsystem.Itisalsousedinvideosurveillance,humancomputerinterfaceandimagedatabasemanagement. Photography[edit] Somerecentdigitalcamerasusefacedetectionforautofocus.[6]Facedetectionisalsousefulforselectingregionsofinterestinphotoslideshowsthatuseapan-and-scaleKenBurnseffect. Modernappliancesalsousesmiledetectiontotakeaphotographatanappropriatetime. Marketing[edit] Facedetectionisgainingtheinterestofmarketers.Awebcamcanbeintegratedintoatelevisionanddetectanyfacethatwalksby.Thesystemthencalculatestherace,gender,andagerangeoftheface.Oncetheinformationiscollected,aseriesofadvertisementscanbeplayedthatisspecifictowardthedetectedrace/gender/age. AnexampleofsuchasystemisOptimEyesandisintegratedintotheAmscreendigitalsignagesystem.[7] [8] EmotionalInference[edit] Facedetectioncanbeusedaspartofasoftwareimplementationofemotionalinference.Emotionalinferencecanbeusedtohelppeoplewithautismunderstandthefeelingsofpeoplearoundthem. LipReading[edit] Facedetectionisessentialfortheprocessoflanguageinferencefromvisualcues.Automatedlipreadinghasapplicationstohelpcomputersdeterminewhoisspeakingwhichisneededwhensecurityisimportant. Seealso[edit] Computervision FaceID Pedestriandetection Picasa SceneTap Superrecogniser Three-dimensionalfacerecognition TSLcolorspace visageSDK Humansensing References[edit] ^"FaceDetection:FacialrecognitionandfindingHomepage". ^Lewis,MichaelB;Ellis,HadynD(2003),"Howwedetectaface:Asurveyofpsychologicalevidence",InternationalJournalofImagingSystemsandTechnology,13:3–7,doi:10.1002/ima.10040,S2CID 14976176 ^abSheu,Jia-Shing;Hsieh,Tsu-Shien;Shou,Ho-Nien(1December2014)."AutomaticGenerationofFacialExpressionUsingTriangularGeometricDeformation".JournalofAppliedResearchandTechnology.12(6):1115–1130.doi:10.1016/S1665-6423(14)71671-2.ISSN 2448-6736. ^JunZhang;YongYan;Lades,M.(1997)."Pacerecognition:Eigenface,elasticmatching,andneuralnets".ProceedingsoftheIEEE.85(9):1423–1435.doi:10.1109/5.628712. ^Maity,Abhishek;Dasgupta,Sayan;Paul,Debjit(2015)."ANovelApproachtoFaceDetectionusingImageParsingandMorphologicalAnalysis".InternationalJournalofComputerTrendsandTechnology.23(4):156–161. ^"DCRPReview:CanonPowerShotS5IS".Dcresource.com.Retrieved2011-02-15. ^Tescofacedetectionsparksneedlesssurveillancepanic,Facebookfailswithteens,doubtsoverGoogle+|Technology|theguardian.com ^IBMhastodealwiththeprivacyissueoffacialrecognition|Technology|amarvelfox.com Externallinks[edit] Detectingfacesinimages:asurvey Facedetectionandrecognition Retrievedfrom"https://en.wikipedia.org/w/index.php?title=Face_detection&oldid=1076104245" Categories:FacerecognitionObjectrecognitionandcategorization Navigationmenu Personaltools NotloggedinTalkContributionsCreateaccountLogin Namespaces ArticleTalk English Views ReadEditViewhistory More Search Navigation MainpageContentsCurrenteventsRandomarticleAboutWikipediaContactusDonate Contribute HelpLearntoeditCommunityportalRecentchangesUploadfile Tools WhatlinkshereRelatedchangesUploadfileSpecialpagesPermanentlinkPageinformationCitethispageWikidataitem Print/export DownloadasPDFPrintableversion Languages CatalàDanskDeutschEspañolFrançaisGalego한국어ItalianoPortuguêsSimpleEnglishதமிழ்Українська中文 Editlinks