Focal Loss ngir gis bu jaarul yoon
Focal loss mooy fonction perte buñ soppeeku buy wàññi misaal yu yomb yi suko defee detector bi mëna fokalise ci yu dëgër yi, yu bariwul.
Résumé
It solved the extreme background-versus-object imbalance that crippled one-stage object detectors.
Plongeur bu xóot
Ci wàllu gis-gis mbir, nataal bi mën na am yenn mbir yu dëggu waaye ay fukki junni barab yuñ mëna tànn, daanaka ñoom ñépp ay background yu yomb lañu. Ak entropie cross buñ miin, mbënd bu yomb bii di negatif mooy ëpp doole ci gradient bi ba noppi di dindi positif yu bariwul yi. Perte focal, bi Lin ak ay naataango ci Facebook AI dugal ci këyitu RetinaNet bu 2017, defay saafara lii ci yokk entropi bu jàkkarloo ak benn facteur (1 - p_t) ^ gamma. Suñu klaasee benn misaal ci anam wu wóolu te jaar yoon, p_t mingi jege 1, kon facteur bi dafay wàññeeku ba ci zero te misaal biñ klaase bu baax du am benn njariñ. misaal yu dëgër, yu juum ci klaas yi denc nañu diisaay bu mat. Ak gamma ci 2, RetinaNet méngoo wala raw detektër yu gëna néew ñaari etap yu melni Faster R-CNN fekk mu des ci reso bu yomb bu am benn paas.
Gis-gis xarala
Parametru fokalise gamma mooy saytu ni ñuy dindie misaal yu yomb yi: ci gamma 0 focal loss mingi méngoo ak entropie croix bu gëna mag, gamma bu gëna kawe dafay ñaw fokalise bi ci mbir yu dëgër yi. Alpha poids équilibrage (dafay faral di nekk 0.25 ci classe rare) dañu koy faral di boole. Lu gëna am solo mooy facteur modulateur bi dafay soppali gradient yi, du valeur perte bi kese, kon backpropagation dafay fësal ci anam wu naturel misaal yu leer te du am misaal bu dëgër buy mine wala resampling.
njeextalu pexe
Njëgg ak budget
Dogal yi architecture di jël dañuy indi njariñ ak njëgu liggéey bi ay at ci ginaaw.
dogal yu gëna leer
Njàngalem xarala yi dafay jàppale ekip yi ñu tànn li gën, te baña yam ci li gëna bees daal.
Xool kalite
Tanneef yu gëna baax ci wàllu ingeñër dina wàññi jafe-jafe yi ci wàllu wóor ci liggéey bi.
Ëlëgu ñàkk focal ngir gis bu jaarul yoon
Focal loss nekk na luñuy jëfandikoo bu baax ginaaw RetinaNet, feeñ ci detektër yu melni FCOS, ci segmentation, ak ci xaaj bu gudd. Variante yu melni perte focal kalite, perte focal distribution, ak perte varifocal dañu koy setal ngir detektër yu bees yu amul ancre ak yu am transformateur. Bi nga xamee ni gis-gis bi dafay dem ci xeetu wax luy waaja am lu melni DETR biy jëfandikoo matching bipartite, pondération focal-style mingi wéy di nekk jumtukaay bu am solo fépp fu frequency class yi gëna ñaawe.
Doxal ci àdduna dëgg
Gis siñaal tali yu ndaw wala doxkat yu sori ci kadre yuy dawal seen bopp, fu pixel yu bari nekk ci ginaaw.
Gis tumër wala lesion yu bariwul ci scanner medikaal yu tisu yu wér yi ëppee doole.
Gis ay jafe-jafe ci ligne de fabrication bi nga xamni li ëpp ci piis yi ñuy saytu dañu baax.
Xamme gaal yu ndaw wala oto ci nataali satelit yu mag ak ci jawwu ji.
Risk yi ak balustrade yi
Optimize benn benchmark mën na nëbb ñakk kattan yu gëna yaatu ci sistem bi.
Njëg li ñuy fay ci infrastructure yi ak ci toppatoo dañuy faral di suufeel.
Bu sistem yi di gëna xawa jafee xam, jafe-jafe yi am ci wàllu kaaraange ak seetlu mën nañu gëna bari.
Roadmap ngir samp gi
Mandargal latency, kalite, ak njëg yi laata ngay jëfandikoo.
Benchmark ci biir sargal ak done yu dëggu.
Jumtukaay bi di saytu njuumte yi, derive bi ak njeextalu jëfandikukat bi.
Waajal rollback ak yooni tontu ci jafe-jafe yi laata ngay eskale.
Weyal di banneexu
Free newsletter
Get the daily AI briefing
Three verified AI stories every weekday morning, written in plain English. Free forever, no ads.
One email each weekday. Unsubscribe in one click. We never sell or share your address.
Test yourself
Take the Focal Loss for Imbalanced Detection quiz
Instant feedback on every answer, and a shareable certificate with a verifiable ID once you pass a course.
Support free AI education. AI Understanding is a 501(c)(3) nonprofit — no ads, no paywall, ever. Make a donation
Gis bi ci topp
Reseau Siamese ak ñàkka am ñatti doom
Laaj yi ñuy faral di laaj
What is Focal Loss for Imbalanced Detection?
Focal loss mooy fonction perte buñ soppeeku buy wàññi misaal yu yomb yi suko defee detector bi mëna fokalise ci yu dëgër yi, yu bariwul. Dafa saafara jafe-jafe bi am ci diggante background ak objet biy gàllankoor detektëru objet yu am benn etap.
Ban jafe-jafe bu mag ci gis mbir ci benn etap lañu defar ngir saafara focal loss?
Ci gis-gis bu dëgër, misaali lëndëm yu yomb ñoo ëpp lu bari mbir yu dëggu yi te ñoo ëpp doole ci gradient cross-entropy biñ miin. Focal perte reweights kon rare, misaal yu dëgër lim lu gëna.
Lan mooy facteur modulateur bi perte focal di yokk ci entropie croix?
Focal perte mooy -(1-p_t)^gamma*log(p_t). (1-p_t)^term gamma dafay wàññeeku ba ci nul ngir mëna wax lu jaar yoon.
Lan mooy xew ci ñàkka focal sudee parametru focalisation gamma bi dafa def 0?
Ci gamma = 0 facteur (1 - p_t)^0 tollu na ci 1, kon perte focal bi dafay wàññeeku ndànk ba ci entropie buñ miin.
Lan la yokk gamma di def ci misaal yu yomb te ñu xaaj bu baax?
Gamma bu gëna kawe dafay tax (1 - p_t) ^ term gamma bi di gëna gaaw wàññeeku ci p_t bu gëna kawe, kon misaal yu yomb yi duñu yokk lu bari ci ñàkk ak degrade.
Ban arsitektir detektër moo dugal ñàkka focal?
Focal loss dugaloon nañu ko ci këyitu RetinaNet 2017, loolu tax detektër bu am benn etap mëna xëcc pexe yu am ñaari etap yu jaar yoon.