Optimization as a Model for Few-Shot Learning - ICLR 2017 reading seminar

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Optimization as a Model for Few-Shot Learning -...

Optimization as a Model for Few-Shot Learning - ICLR 2017 reading seminar

Hokuto Kagaya

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!%F/" 4IJCVZB)JLBSJF )PLVUP ,BHBZB !@IPLLVO@ 0QUJNJ[BUJPOBTB.PEFM GPS'FX4IPU-FBSOJOH

5-%3 • 1VSQPTF • #FUUFSJOGFSFODFGPSGFXTIPUPOFTIPUMFBSOJOH QSPCMFN • .FUIPE • .FUBMFBSOJOHCBTFEPO-45.PGEFFQOFVSBM

#BDLHSPVOE • 8IZEFFQMFBSOJOHTVDDFFEFE • NBDIJOFQPXFS • BNPVOUPGEBUB • -BSHF%BUBTFU

#BDLHSPVOE • )PXFWFS *ONBOZGJFMET UPDPMMFDUBMBSHF BNPVOUPGUSBJOJOHTBNQMFTJT • EJGGJDVMU •

1SPCMFN1VSQPTF • )PXDBOXFBDRVJSFHFOFSBMJ[FENPEFMVTJOH GFXTBNQMFTBOEBTFUOVNCFSPGVQEBUFT • &YJTUFEHSBEJFOUCBTFEUSBJOJOHBMHPSJUIN 4(% "%".

1SPCMFN1VSQPTF • )PX • .FUBMFBSOJOH • -FBSOJOHUPMFBSO5SBJOMFBSOFSJUTFMG • "WBSJFUZPGNFUBMFBSOJOH

1SPQPTFENFUIPE • -45.CBTFENFUBMFBSOJOH

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%BUB4FQBSBUJPO • NFUBUSBJOEBUBTFU • NFUBUFTUEBUBTFU • NFUBTBNQMF UBSHFU USBJOJOH

1SPQPTFE.FUIPE " = "$% + )*+, ℒ" " =

1SPQPTFE.FUIPE ←meta learner‘s iteration ←learner‘s iteration (meta) loss

1SPQPTFE.FUIPE • 'SPNBVUIPS`TTMJEF

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ॴײ • USBOTGFSMFBSOJOHʹ͓͚ΔʮผυϝΠϯͷܦݧ Λ׆͔͢ʯͱ͍͏࡞ۀΛʮ࣌ܥྻͷֶशʯతʹଊ ͑ͯ -45.Ϟσϧͱֶͯ͠शͨ͠ɺͱ͍͏ͷ͸ ࣗવʹࢥ͑ͨ • ͢Ͱʹ͋ͬͨൃ૝ʁ࣌ؒͳؔ͘࿈ݚڀ·ͰಡΈࠐΊ ͣɻɻ

ଟ෼Θ͔ͬͯͳ͍͜ͱ • ݁ہɺ͜ͷ࿦จͰॳΊͯΘ͔ͬͨͷ͸Ͳ͜ʁ -45.Λ MFBSOJOHUPMFBSOʹ࢖ͬͨͷ͸ଟ෼ॳ Ίͯ͡Όͳ͍ʁ • ྫ͑͹ "OESZDIPXJD[ `