Luminta Focal ee Ogaanshaha Isku-dheellitir la'aanta
Luminta foojignaanta waa hawl lumin oo wax laga beddelay taas oo hoos u dhigaysa tusaalayaal fudud si uu barehu diiradda u saaro kuwa adag ee naadirka ah.
Dulmar
It solved the extreme background-versus-object imbalance that crippled one-stage object detectors.
quusid qoto dheer
Ogaanshaha shayga, sawirku waxa uu ka koobnaan karaa dhawr walxood oo dhab ah balse tobanaan kun oo goob murashaxiin ah, kuwaas oo ku dhawaad dhamaantood asalkoodu fudud yahay. Iyada oo la raacayo heerka iskutallaabta-entropy, daadkan xun xun ee fudud ayaa xukumaya jaan-goynta oo maanshiyaha wanaagga naadir ah. Luminta Focal, oo lagu soo bandhigay warqadda 2017 RetinaNet ee Lin iyo asxaabtiisa Facebook AI, waxay hagaajinaysaa tan iyadoo lagu dhufto iskutallaabta-entropy qodob (1 - p_t) ^ gamma. Marka muunada loo kala saaro si kalsooni leh oo sax ah, p_t waxay ku dhowdahay 1, markaa arrintu waxay u sii yaraanaysaa eber iyo tusaalaha si fiican loo soocay si dirqi ah ayuu wax ugu kordhinayaa. Tusaalayaal adag, oo si khaldan loo soocay waxay hayaan miisaan buuxa. Iyada oo gamma ku dhow 2, RetinaNet waxay la mid tahay ama garaacday qalab baarayaal laba heer ah oo gaabis ah sida Faster R-CNN iyadoo la sii joogayo shabakad hal baas ah oo fudud.
Aragtida Farsamada
Halbeegga diiradda saaraya gamma-ga ayaa koontaroolaya sida tusaalooyinka fudud ee gardarada leh loo xakameynayo: marka la eego gamma 0 luminta xuddunta waxay la mid tahay isdhaafsiga-entropy caadiga ah, iyo gamma-ga sare wuxuu xoojiyaa diiradda kiisaska adag. Miisaanka alfa oo dheellitiran (badanaa 0.25 ee fasalka naadir) ayaa badanaa lagu daraa. Muhiimad ahaan qodobka wax ka beddelaya ayaa qaabeeya jaangooyooyinka, ma aha oo kaliya qiimaha lumitaanka, sidaa darteed dib-u-celinta waxay si dabiici ah u xoojinaysaa muunadaha mugdiga ah iyada oo aan gacanta laga saarin tusaale adag ama dib-u-qaabayn.
Saamaynta Istiraatijiyadeed
Qiimaha iyo miisaaniyada
Go'aamada qaab-dhismeedku waxay horseedaan waxqabadka iyo kharashka hawlgalka sannadaha.
Go'aamo cad
Waxbarashada farsamada waxay ka caawisaa kooxaha inay doortaan xidhmo sax ah, ma aha oo kaliya kan ugu cusub.
Xakamaynta tayada
Doorashooyinka injineernimada ee wanaagsan waxay yareeyaan shilalka la isku halleyn karo ee wax soo saarka.
Mustaqbalka Luminta Focal ee Ogaanshaha Isku dheelitir la'aanta
Luminta foojignaanta waxay noqotay shay aan caadi ahayn oo ka baxsan RetinaNet, oo ka soo muuqda qalabka wax baadha sida FCOS, qaybta, iyo soocidda dabo-dheer. Kala duwanaanshiyaha sida luminta tayada tayada, luminta xudunta qaybinta, iyo luminta varifocal waxay u nadiifiyaan qalabka casriga ah ee bilaashka ah iyo qalabka wax baara. Marka ogaanshaha uu u wareego moodooyinka saadaasha sida DETR ee adeegsada isbarbardhigga laba-geesoodka ah, qaabka focal-u-cusboonaynta ayaa weli ah qalab wax ku ool ah meel kasta oo soo noqnoqoshada fasalka si daran loo qalloociyo.
Dhaqangelinta Adduunka-dhabta ah
Ogaanshaha calaamadaha yar yar ee wadooyinka ama lugeeyayaasha fog ee ku dhex jira fiimyada wadista iskood u wada halka pixels ay yihiin gadaal.
Helitaanka burooyinka ama nabarada dhifka ah ee baarista caafimaadka oo ay u badan yihiin unug caafimaad qaba.
Cilladaha lagu arko khadka wax soo saarka halkaasoo inta badan qaybaha la baaray ay caadi yihiin.
Aqoonsiga maraakiibta yar yar ama baabuurta ku jira dayax gacmeedka waaweyn iyo sawirada hawada.
Khatarta & Dariiqyada Ilaalada
Hagaajinta hal bartilmaameed waxay qarin kartaa daciifnimada nidaamka ballaaran.
Kaabayaasha dhaqaalaha iyo dayactirka inta badan waa la dhayalsadaa.
Nabadgelyada iyo daldaloolada u fiirsashada ayaa kori kara marka nidaamyadu noqdaan kuwo aad u adag.
Qorshe Hawleedka Dhaqangelinta
Qeex daahida, tayada, iyo bartilmaameedyada qiimaha ka hor inta aan la hirgelin.
Benchmark marka la eego culeyska dhabta ah iyo xaaladaha xogta.
La socodka qalabka khaladaadka, leexashada, iyo saamaynta isticmaalaha.
U diyaari dib-u-noqoshada iyo dariiqyada jawaab-celinta dhacdada ka hor inta aanad miisaan.
Sii wad Sahaminta
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Hagaha xiga
Shabakadda Siamese iyo Khasaaraha Saddex-geesoodka ah
Su'aalaha soo noqnoqda
What is Focal Loss for Imbalanced Detection?
Luminta foojignaanta waa hawl lumin oo wax laga beddelay taas oo hoos u dhigaysa tusaalayaal fudud si uu barehu diiradda u saaro kuwa adag ee naadirka ah. Waxay xallisay isu dheeli tirnaan la'aanta asalka iyo shay ee aadka u daran taasoo curyaamisay sheyga hal-heer ah.
Waa maxay dhibatada udub dhexaadka u ah ogaanshaha shayga hal-heer ah ee luminta xudunta u ahayd in wax laga qabto?
Ogaanshaha cufan, tusaalooyinka asalka ah ee fudud ayaa aad uga badan walxaha dhabta ah waxayna xukumaan jaangooyooyinka isdhaafsiga ah ee caadiga ah. Focal luminta miisaankeedu aad buu naadir u yahay, tusaalooyin adag ayaa tirinaya in ka badan.
Waa maxay qodobka wax-ka-beddelka ah ee luminta focalku ku dhufto isku-tallaabta-entropy?
Khasaaruhu waa -(1 - p_t)^gamma * log(p_t). Erayga (1 - p_t)^gamma wuxuu u dhintaa eber si kalsooni leh loo saadaaliyo.
Maxaa ku dhacaya luminta focalka marka cabbirka diiradda saaraya gamma laga dhigo 0?
Marka loo eego gamma = 0 qodobka (1 - p_t) ^ 0 waxay la mid tahay 1, markaa luminta diiradda waxay si sax ah u yaraynaysaa heerka iskutallaabta-entropy.
Muxuu kordhinayaa gammadu ka qabtaa tusaalooyin fudud oo si wanaagsan loo soocay?
Gammada sare waxay ka dhigtaa (1 - p_t) ^ gamma erey si dhakhso ah u yaraado p_t sare, markaa tusaalooyinka fudud waxay gacan ka geystaan xitaa wax ka yar khasaaraha iyo gradiment.
Qalabkee baadhaha naqshadeeyayaasha keenay luminta focal?
Luminta focal ayaa lagu soo bandhigay warqadda RetinaNet ee 2017, taasoo u sahlaysa hal-marji baadiyaha si uu ula tartamo hababka saxda ah ee labada marxaladood.