画像を用いたファッションアイテム検索/Image Retrieval for Fashion

by tn1031

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© 2017 VASILY,Inc. ΞΠςϜݕࡧʹ͓͚Δը૾ೝࣝͷՁ஋ ͜ͷͭͷΞΠςϜͷ۠ผʹد༩͢Δ৘ใ͸Կ͔ ʻ.VOJDIʼϒϥ΢εʢ./5ʣ = ϒϥϯυɿϛϡχοΫʦ.6/*$)ʧ ΧςΰϦɿϒϥ΢ε ৭ɿ྘ʢάϦʔϯʣ ΞΠςϜઆ໌ɿ Ϟʔυͳண͜ͳ͠Λ׎͑ΔϘϦϡʔϜεϦʔϒͷϒϥ΢εͰ͢ɻ କΛંΓฦͯ͠௚ઢతͳΧοτΛڧௐ͢Δ͜ͱͰɺ०ͷσΟςΠ ϧ΋ͻͱຯҧ͏ݟ͑ํʹɻγϯϓϧͳ਎ࠒͱͷόϥϯε΋ྑ޷Ͱ ͢ɻγϫʹͳΓʹ͍͘৳ॖૉࡐΛ࢖͓ͬͯΓɺσΠϦʔʹؾܰʹ औΓೖΕΒΕΔͷ͕ϙΠϯτɻ͖ͬ͢Γͱ։͍ͨ7ωοΫ͕େਓ ͷঁੑΒ͠͞Λԋग़͠·͢ɻ <8&#ݶఆ঎඼><΢Υογϟϒϧ>ϑϨΞεϦʔϒϒϥ΢ε = ϒϥϯυɿΦΫτʔϒϧʦ0$50#3&ʧ ΧςΰϦɿϒϥ΢ε ৭ɿ྘ʢάϦʔϯʣ ΞΠςϜઆ໌ɿ τϨϯυΛҙࣝͨ͠ϑϨΞεϦʔϒτοϓεɻ͖ͬ͢Γͱൈ͚ײ ͷ͋ΔωοΫϥΠϯ΍όοΫγϣοτ͕ঁੑΒ͍͠งғؾͮ͘Γ ͷϙΠϯτɻ্඼͞΋͓͠ΌΕײ΋ซͤ࣋ͬͨҰ඼͸ɺͲΜͳੈ ୅ͷํ͔Β΋޷ධͰ͢ɻΦϑΟε΋σʔτ΋͓೚ͤͷσβΠϯͰ ͢ɻ ςΩετͰൺֱͨ͠৔߹

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© 2017 VASILY,Inc. ΞΠςϜݕࡧʹ͓͚Δը૾ೝࣝͷՁ஋ ΞΠςϜͷྨࣅ౓ΛධՁ͢Δ্Ͱը૾͸͔ܽͤͳ͍৘ใͰ͋Δ ‣ ΞΠςϜͷڞ௨఺΍ࠩ෼͕೺ѲͰ͖Δ ςΩετʹൺ΂ؚͯ·ΕΔ৘ใͷྔ͕ଟ͍ ‣ ΞΠςϜͷը૾͸ίϯςΩετΛؚΜͰ͍Δ ը૾ΛݟΔ͚ͩͰར༻γʔϯ΍ίʔσΟωʔτ͕૝૾Ͱ͖Δࣄ͕͋Δ ‣ ϑΝογϣϯ༻ޠͷࣙॻ΍Φϯτϩδʔ͕ඞཁͳ͍ ϑΝογϣϯ͸ྲྀߦʹහײͳ෼໺ͷͨΊɺࣙॻͷϝϯςͷ޻਺Λ࡟ݮ Ͱ͖Δ͜ͱͷϝϦοτ͸ඇৗʹେ͖͍ ෳࡶͳ৘ใΛநग़Մೳͳը૾ೝٕࣝज़͸ϑΝογϣϯͱ૬ੑ͕ྑ͍

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© 2017 VASILY,Inc. ϑΝογϣϯσʔλͷಛੑ ϑΝογϣϯͰѻ͏σʔλʹ͸υϝΠϯಛ༗ͷࣄ৘͕ଘࡏ͢Δ ΧςΰϦ΍ଐੑ ͷଟ༷ੑ ྫ ΧςΰϦ΍ଐੑͷछྨ͕ଟ͍ GBCMJDŊTUZMF ج४͕ᐆດͰਓखͰ΋൑ผ͕ࠔ೉ ϓϧΦʔόʔγϟπ ͬͯͳײ͡Ͱ͍ͭ΋෰೰Ή شൃੑ εέʔϧ ࣭ ؍఺ Ψ΢νϣɾεΧϯπ໰୊ നWTΦϑϗϫΠτ ϑΝογϣϯΞΠςϜ΍༻ޠ͸ೖΕସΘΓ͕ܹ͍͠ ʮϑΝογϣϯʯʮྲྀߦʯͳͷͰ ສ఺೔ͷ৽ணΞΠςϜ ΦʔόʔΦʔϧαϩϖοτ &$αΠτͰѻ͏঎඼ͷଞɺ4/4΁౤ߘ͞ΕΔը૾΋ ϑΝογϣϯը૾ʹؚ·ΕΔ΋ͷ͕͋Δ *OTUBHSBN 1JOUFSFTU ଟ༷ͳΧςΰϦͱ$POTVNFSHFOFSBUFEͳը૾ ϥϕϧͷؒҧ͍΍ࣗ༝ա͗Δϋογϡλά આ໌

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© 2017 VASILY,Inc. جຊతͳߟ͑ํ ϑΝογϣϯը૾ͷݕࡧ͸*NBHF3FUSJFWBMͱ͍͏ΑΓ*OTUBODF3FUSJFWBM ‣ ը૾͸ඇઢܗؔ਺ʹΑͬͯಛ௃্ۭؒͷ఺ ʹࣹӨ͞ΕΔ ‣ ը૾ͷυϝΠϯʹؔ܎ͳ͘ɺಉ͡ΞΠςϜ͸ ۙ͘ͷ఺ʹࣹӨ͢ΔΑ͏ͳؔ਺͕͋Ε͹ྑ͍ ‣ ্ड़ͷཁ݅Λຬͨؔ͢਺ΛʮֶशʯʹΑͬͯ ֫ಘ͢Δ CNN CNN ݕࡧΫΤϦ ඇઢܗؔ਺ ಛ௃ۭؒ Ξϓϩʔν ‣ ಉ͡ΞΠςϜΛಉ͡Ͱ͋Δͱಉఆ͢Δ ‣ ΞΠςϜͷมܗ΍എܠ͸ແࢹ͢Δ *OTUBODF3FUSJFWBM

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© 2017 VASILY,Inc. ݚڀࣄྫ ख๏͸༷ʑ͋Δ͕ɺओʹಛ௃நग़ͷํ๏͕ҟͳΔ :BOH ;IBJ ,FZXPSET ൑ผλεΫͷֶशͰಘΒΕΔજࡏঢ়ଶΛ ಛ௃ྔͱ͢Δ LFZQPJOUճؼλεΫͷֶशͰಘΒΕΔ જࡏঢ়ଶΛಛ௃ྔͱ͢Δ ΞΠςϜಉ࢜ͷྨࣅ౓Λֶश͢Δ ྖҬ෼ׂͰಘΒΕͨྖҬ͔Βہॴಛ௃ྔ Λநग़ͯ͠ൺֱ͢Δ "UUSJCVUF1SFEJDUJPO )BTIJOH 'BTIJPO-BOENBSL%FUFDUJPO 4IBOLBS 4POH 7JUUBZBLPSO -JV ֓ཁ 4FNBOUJD4FHNFOUBUJPO 'FBUVSF &YUSBDUJPO 5SJQMFUMPTT 4JNJMBSJUZ-FBSOJOH ख๏

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© 2017 VASILY,Inc. "TQFDU1SFEJDUJPOBOE3FSBOLJOH ‣ ΞΠςϜͷ"TQFDU͸9(#PPTUͰ൑ผ͢Δ ‣ "TQFDUͷྨࣅ౓ͱը૾ͷ)BNNJOHڑ཭ͷઢܗ݁߹Ͱ࠷ऴతͳ4DPSFΛܭࢉ͢Δ ai S = Sappearance + (1 )Saspect Saspect = 1 Pn i=1 wi n X i=1 m X j=1 wiI(aq i = aj) )BNNJOHڑ཭ʹجͮ͘4DPSF ‣ ΫΤϦͱݕࡧର৅ͷ"TQFDUͷҰக਺ʹґଘͯ͠4DPSF͕ܾ·Δ ‣ "TQFDUͷॏཁ౓ʹ͸܏͕͍͍ࣼͭͯΔ ‣ ߪೖʹޮ͍ͯ͘Δ"TQFDU΄ͱॏཁ౓͕େ͖͘ɺ͜ͷ஋͸ ϋʔυίʔυ͞Ε͍ͯΔ

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© 2017 VASILY,Inc. ॴײ ‣ "UUSJCVUF1SFEJDUJPO͚ͩͰΞΠςϜݕࡧ͸࣮ݱͰ͖Δͷ͔ ༧ଌͨ͠"TQFDUʹΑΔ3FSBOLJOHΛߦ͍ͬͯΔ ೖྗը૾ͷυϝΠϯʹؔͯ͠ݴٴ͕ͳ͍ ‣ λεΫࣗମ͸ඇৗʹγϯϓϧ ൑ผλεΫ͸ൺֱత؆୯ʹֶशͰ͖Δ ‣ εέʔϧͤ͞ΔࡍͷࢀߟʹͳΔ ͜ͷ࢓૊͸F#BZͷνϟοτϘοτʹར༻͞Ε͍ͯΔ େྔͷϦΫΤετΛϦΞϧλΠϜʹॲཧ͢Δೳྗ͕ٻΊΒΕΔ

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© 2017 VASILY,Inc. 'JOF(SBJOFE*NBHF4JNJMBSJUZ ‣ ਂ͍ωοτϫʔΫͱઙ͍ωοτϫʔΫΛ૊Έ߹ΘͤͨϞσϧ ‣ ը૾ͷෳࡶͳߏ଄ͱ୯७ͳߏ଄Λಉ࣌ʹѻ͏ͨΊͷ޻෉ ‣ ਂ͍ωοτϫʔΫ ը૾ͷෳࡶͳߏ଄Λೝࣝ͢Δ େ·͔ͳྠֲͳͲ ൑ผλεΫͰ׆༂ ‣ ઙ͍ωοτϫʔΫ ը૾ͷ୯७ͳߏ଄Λೝࣝ͢Δ ৭΍໛༷ͳͲ ఻౷తͳಛ௃நग़ख๏ʹ͍ۙ ಉ͡ΞΠςϜͰ͋Δͱೝ͍ࣝͨ͠ ҧ͏ΞΠςϜͰ͋Δͱೝ͍ࣝͨ͠

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© 2017 VASILY,Inc. 5SJQMFUMPTT Anchor CNN CNN CNN Positive Negative Embedding Embedding margin Anchor Positive Negative ֶश ‣ 5SJQMFUMPTT͸"ODIPS 1PTJUJWF /FHBUJWFͷ૊Λೖྗͱͯͦ͠ΕͧΕͷؒͷڑ཭ΛධՁ͢Δ ‣ "ODIPSɾ1PTJUJWFʹରͯ͠"ODIPSɾ/FHBUJWFؒͷڑ཭͕ҰఆҎ্େ͖͘ͳΔΑ͏ʹྗ͕͔͔Δ

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© 2017 VASILY,Inc. 5SJQMFUMPTT margin AnchorɾPositive ؒͷڑ཭ AnchorɾNegative ؒͷڑ཭ ‣ 5SJQMFUMPTT͸"ODIPS 1PTJUJWF /FHBUJWFͷ૊Λೖྗͱͯͦ͠ΕͧΕͷؒͷڑ཭ΛධՁ͢Δ ‣ "ODIPSɾ1PTJUJWFʹରͯ͠"ODIPSɾ/FHBUJWFؒͷڑ཭͕ҰఆҎ্େ͖͘ͳΔΑ͏ʹྗ͕͔͔Δ ๬·͘͠ͳ͍ঢ়ଶ ๬·͍͠ঢ়ଶ loss 0 ↵ D(a, n) D(a, p)

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© 2017 VASILY,Inc. 5SJQMFUMPTTͷֶश͸ऩଋͤ͞Δ͜ͱ͕೉͍͠ͷͰ޻෉͕ඞཁ ղܾࡦ ‣ #BUDIIBSE )FSNBOT ϛχόονͷதͰ࠷΋"ODIPSʹࣅ͍ͯΔෛྫͱ ࠷΋"ODIPSʹࣅ͍ͯͳ͍ਖ਼ྫΛαϯϓϦϯά͢Δ ‣ 4FNJIBSEOFHBUJWFNJOJOH 4DISP⒎ ֶशޮՌ͕͋Δఔ౓ظ଴Ͱ͖ɺֶ͔ͭश͕೉͘͠ ͳ͍ෛྫΛαϯϓϦϯά͢Δ Embedding Embedding margin Anchor Positive Negative Embedding ظ଴͢Δ ঢ়ଶ margin ๬·͘͠ ͳ͍ঢ়ଶ loss 0 ↵ D(a, n) D(a, p) ֶश

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© 2017 VASILY,Inc. ֶशޮՌͷߴ͍ෛྫΛαϯϓϦϯά͢Δ Negative Positive Anchor Semi-hard Negative margin ‣ ϕʔγοΫͳαϯϓϦϯά "ODIPSͱҟͳΔΞΠςϜΛҰ༷ʹ αϯϓϦϯά͢Δ "ODIPSͱ໌Β͔ʹҟͳΔΞΠςϜ ͕αϯϓϧ͞Εͨ৔߹ɺֶशͷ ඞཁ͕ͳ͍ "ODIPSͱࣅ͍͗ͯ͢ΔΞΠςϜ͕ αϯϓϧ͞Εͨ৔߹ɺѱ͍ہॴղ ʹτϥοϓ͞ΕΔ ֶशޮ཰͕ѱ͍ ‣ 4FNJIBSEOFHBUJWFNJOJOH "ODIPSͱҟͳΔΞΠςϜΛҎԼ ͷ੍໿Λຬͨ͢αϯϓϧΛબ୒ ͢Δ "ODIPS1PTJUJWFؒͷڑ཭ΑΓ "ODIPS/FHBUJWFؒͷڑ཭͕ େ͖͍ ্هΛຬ্ͨͨ͠Ͱ"ODIPSͱͷ ڑ཭͕࠷΋খ͍͞ xn i = argmin x n i || f ( xa i ) f ( xn i )||2 2 s.t. || f ( x a i ) f ( x p i )||2 2 < || f ( x a i ) f ( x n i )||2 2 ֶशޮ཰͕ߴֶ͘श͕༰қ || f ( x a i ) f ( x p i )||2

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© 2017 VASILY,Inc. ॴײ ‣ 5SJQMFUMPTTΛ༻ֶ͍ͨश͸೉͍͠ ൑ผλεΫͳͲΛ՝͢ͱߋʹ೉қ౓͕ߴ͘ͳΔ ֶशத͸"ODIPS 1PTJUJWF /FHBUJWFؒͷڑ཭Λৗʹ֬ೝͨ͠΄͏͕ྑ͍ ඞཁʹԠͯ͡ίετؔ਺΍5SJQMFUͷαϯϓϦϯάΛ޻෉͢Δඞཁ͕͋Δ ‣ 'JOF(SBJOFE*NBHF4JNJMBSJUZ͸ศར طଘͷωοτϫʔΫΛ༰қʹ֦ுͰ͖Δ *20/ͷσʔλͰ΋࣮ࡍʹվળΛ֬ೝ ‣ ΧςΰϦຖʹϞσϧΛ࡞Δඞཁ͕͋Δ ϑΝογϣϯΞΠςϜ͸ΧςΰϦ਺͕ଟ͍ͷͰେม deep shallow deep+shallow

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© 2017 VASILY,Inc. ॲཧͷྲྀΕ 4FNBOUJD 4FHNFOUBUJPO 'FBUVSF&YUSBDUJPO -JOFBS47. 1PTF&TUJNBUJPO ‣ :BOHΛར༻ͯ͠ϙʔζਪఆͱύʔπͷݕग़λεΫΛղ͘ ‣ ޙଓͷॲཧʹ༻͍Δಛ௃ྔ͸ͦΕͧΕͷ#PVOEJOHCPY͔Βநग़͢Δ ‣ :BNBHVDIJΛར༻ͯ͠ྖҬ෼ׂͱྖҬຖͷΧςΰϦ൑ผλεΫΛղ͘ ‣ ޙଓͷॲཧʹ༻͍Δಛ௃ྔ͸ͦΕͧΕͷྖҬ͔Βநग़͢Δ ‣ ෼ׂͨ͠ྖҬ͔Β༷ʑͳಛ௃ྔΛநग़͢Δ ‣ छྨͷը૾ΛαϯϓϦϯάͯ͠5VQMFΛߏ੒͢Δ ‣ αϯϓϦϯά͞Εͨ5VQMFʹ͍ͭͯɺࣅ͍ͯΔࣅ͍ͯͳ͍Λ൑ผ͢Δ

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© 2017 VASILY,Inc. 'FBUVSF&YUSBDUJPO 1PTF&TUJNBUJPO 4FNBOUJD 4FHNFOUBUJPO 'FBUVSF&YUSBDUJPO -JOFBS47. DPMPS ಛ௃ྔ ‣ 3(# ‣ -BC ॲཧ ‣ લܠྖҬ͔ΒΧϥʔɹɹ ώετάϥϜΛ࡞੒ UFYUVSF ‣ .3 ‣ )0( TIBQF ‣ CJOBSZNBTL ‣ %PMMBS QBSTF ‣ QFSDFOUBHFPG FBDIJUFNQSFTFOU TUZMF EFTDSJQUPS ‣ :BNBHVDIJ ‣ લܠྖҬ͔Βநग़ͯ͠ɹ ྔࢠԽ ‣ લܠྖҬΛࣔ͢CJOBSZ NBTLͱFEHFNBQ ‣ ΧςΰϦͷଘࡏ֬཰Λ ද֬͢཰ϕΫτϧ ‣ छྨͷಛ௃ྔܭ ࣍ݩΛ1$"Ͱ࣍ݩʹ

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© 2017 VASILY,Inc. ॴײ ‣ ݕࡧΛ࣮ݱ͢Δ·Ͱʹඞཁͳॲཧ͕ଟ͗͢Δ ͦΕͧΕͷॲཧͷਫ਼౓͸ͲΕ΄Ͳ͔ &OEUP&OEͰ࠷దԽͰ͖ͳ͍͔ ‣ ಛ௃ྔͷ࡞Γํ͕ࢀߟʹͳΔ ϑΝογϣϯͷ෼໺ʹ͓͍ͯޮՌతͳಛ௃ྔʹؔ͢Δࢿྉ ෰ͷྖҬ͕ਖ਼͘͠4FHNFOUBUJPOͰ͖Ε͹ݕࡧ༻ͷಛ௃ྔ΍ϥϯΩϯάΞϧΰϦζϜ͸γϯϓϧͰ΋ྑ͍ ‣ ΫϩευϝΠϯݕࡧ͸Մೳ͔ ࿦จͩͱண༻ը૾͔Βண༻ը૾ͷΈ ஔ͖ࡱΓը૾ʹ֦ு͢ΔͨΊʹ͸ಛ௃ྔΛ࠶౓ઃܭ͢Δඞཁ͕͋ΔͱࢥΘΕΔ

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© 2017 VASILY,Inc. ֤4UBHFͱ1TFVEP-BCFMͷ໾ׂ 4UBHF ༧ଌ͢Δ΋ͷ ,FZQPJOUͷେ·͔ͳ࠲ඪ 1TFVEP-BCFM 4UBHF 4UBHFͷ༧ଌͱਖ਼ղͷͣΕ Φϑηοτ Ͳͷ࢟੎ʹͲΕ͚͍͔ͩۙ ࢟੎㲈LFZQPJOUͷ࠲ඪ Ͳͷ޲͖ʹͲΕ͚ͩमਖ਼ ͢Ε͹Α͍͔ Φϑηοτͷύλʔϯ 4UBHF 4UBHFͷ༧ଌͱਖ਼ղͷͣΕ Φϑηοτ શମͷΦϑηοτͱݸʑͷΦϑηοτ ͷؔ܎ සग़ύλʔϯͱͷ ࠩ෼Λճؼ͢Δ

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© 2017 VASILY,Inc. ॴײ ‣ ࠶ݱ͠ͳ͍ ֶशΛ௥ࢼͯ͠Έ͕ͨ࿦จͷΑ͏ͳਫ਼౓Λୡ੒Ͱ͖ͳ͔ͬͨ ࿦จதʹॻ͔Ε͍ͯͳ͍ҋͷςΫχοΫ͕ଟͦ͏ ‣ -BOENBSL͸఺ͷ࠲ඪΛճؼ͍ͯ͠Δ ϙʔζਪఆͷ෼໺ͰҰൠతͳͷ͸ώʔτϚοϓͷճؼ ώʔτϚοϓͷճؼͰ΋ղ͚ͦ͏ ‣ ,FZQPJOUͷݕग़λεΫ͸΋ͬͱ੝Γ্͕ͬͯཉ͍͠ ͏·͘ݕग़Ͱ͖ΔΑ͏ʹͳΕ͹มܗʹڧ͍ݕࡧγεςϜ͕ߏஙͰ͖Δ ϑΝογϣϯ෼໺ͱ૬ੑྑͦ͞͏ ఺ͷ࠲ඪΛճؼ ֶशࡁΈϞσϧ ώʔτϚοϓΛճؼ 8FJ

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© 2017 VASILY,Inc. ·ͱΊ ‣ ϑΝογϣϯΞΠςϜݕࡧͱը૾ೝࣝ ϑΝογϣϯ෼໺Ͱը૾ೝࣝΛѻ͏ҙٛʹ͍ͭͯ ѻ͏ը૾σʔλͷಛੑʹ͍ͭͯ ‣ ݚڀࣄྫ "UUSJCVUF1SFEJDUJPO͸γϯϓϧ͔ͭͻͱͭͷϞσϧͰࡁΉ 4JNJMBSJUZ-FBSOJOH͸ը૾ͷಛੑΛٵऩͯ͘͠Εͯڧྗ͕ͩΧςΰϦຖͷϞσϧ͕ඞཁ 4FNBOUJD4FHNFOUBUJPO͸ॲཧ͕ଟ͘ෳࡶ ,FZQPJOU%FUFDUJPO͸ہॴಛ௃ྔͷநग़ख๏ͱͯ͠ظ଴Ͱ͖Δ

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