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成長を止めない機械学習のやり方 / Don't stop 'til you get enough (data).
Yuichiro Someya
March 23, 2018
Programming
15
4.5k
成長を止めない機械学習のやり方 / Don't stop 'til you get enough (data).
https://manabiya.tech
Yuichiro Someya
March 23, 2018
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Transcript
ΛࢭΊͳ͍ ػցֶशͷΓํ ΫοΫύουגࣜձࣾɹછ୩༔Ұ ."/"#*:"
ࣗݾհ છ୩༔Ұ<:VJDIJSP4PNFZB> ౦ژۀେֶେֶӃܭࢉֶम࢜ ΫοΫύουגࣜձࣾݚڀ։ൃ෦ ϦαʔνΤϯδχΞ݄d ػցֶशج൫
Ϩγϐσʔλͷੳ UXJUUFSDPN!BZFNPT@Z HJUIVCDPNBZFNPT IUUQTXXXBZFNPTNF
None
ϨγϐɿສҎ্ ࠃͷ݄ؒར༻ऀɿສਓ
ରԠݴޠɿݴޠϲࠃ ւ֎ͷ݄ؒར༻ऀɿສਓҎ্
ΫοΫύουݚڀ։ൃ෦ ݄ʹൃ ࢲ͕ଐ͞Εͨͷಉ࣌ظ ໊࣌ͷϝϯόʔ ݄ݱࡏࠃʹ໊ ւ֎ʹ໊
ྉཧ͖Ζ͘ ΈࠐΈχϡʔϥϧωοτϫʔΫ ʹΑΔྉཧը૾ͷࣗಈೝࣝ εϚʔτϑΥϯͷࣸਅͷɺ ྉཧࣸਅΛࣗಈతʹऩूه
ྉཧ͖Ζ͘ ສਓҎ্ͷϢʔβʔ͕ར༻ ສຕҎ্ͷྉཧࣸਅΛه ݄ݱࡏ
ͦͷଞػցֶशϓϩδΣΫτ ը૾ੳʹΑΔϨγϐͷྨ ࡐྉ໊ͷਖ਼نԽ <͓͠ΐ͏Ώ ে༉ γϣʔϢ><͠ΐ͏Ώ>
ϑΟʔυόοΫͷࣗಈλά͚ FUD
લஔ͖
l લུ ʮ࣭ʯ·Ͱ͍͔ͳ͍͕ؾʹͳ͍ͬͯΔ͜ͱɺ ʮճʯΛΓ͍͕ͨͳ͔ͳ͔Δػձ͕ͳ͔ͬͨ͜ͱɻ ͦ͏͍ͬͨٙΛຊத͔ΒूΊɺ ΧϯϑΝϨϯεΛ௨ͯ͡ղܾࡦΛݟग़͠ɺܙΛੜΈग़͢ɻ ͜Ε͕ɺ."/"#*:"Λ։࠵͢Δ͍Ͱ͢ɻz IUUQTNBOBCJZBUFDI
l લུ ʮ࣭ʯ·Ͱ͍͔ͳ͍͕ؾʹͳ͍ͬͯΔ͜ͱɺ ʮճʯΛΓ͍͕ͨͳ͔ͳ͔Δػձ͕ͳ͔ͬͨ͜ͱɻ ͦ͏͍ͬͨٙΛຊத͔ΒूΊɺ ΧϯϑΝϨϯεΛ௨ͯ͡ղܾࡦΛݟग़͠ɺܙΛੜΈग़͢ɻ ͜Ε͕ɺ."/"#*:"Λ։࠵͢Δ͍Ͱ͢ɻz IUUQTNBOBCJZBUFDI ՝ͷڞ༗
ղܾࡦͷྻڍͱੳ
lຊηογϣϯͰ·ͣػցֶशΛऔΓೖΕͨ৫ʹ͓͚Δ ՁΛ્͋Δ͍ಷԽͤ͞Δز͔ͭͷཁҼΛࢦఠ͠ɺ ͦΕΒͷཁҼʹ͍ͭͯ։ൃج൫ΤϯδχΞϦϯάɺ νʔϜߏ༷ʑͳ͔֯Βߟ͠·͢ɻ·ͨ͞Βʹɺ ͦͷΑ͏ͳ՝ʹର͢ΔΫοΫύουͷऔΓΈΛհ͠·͢ɻz
lຊηογϣϯͰ·ͣػցֶशΛऔΓೖΕͨ৫ʹ͓͚Δ ՁΛ્͋Δ͍ಷԽͤ͞Δز͔ͭͷཁҼΛࢦఠ͠ɺ ͦΕΒͷཁҼʹ͍ͭͯ։ൃج൫ΤϯδχΞϦϯάɺ νʔϜߏ༷ʑͳ͔֯Βߟ͠·͢ɻ·ͨ͞Βʹɺ ͦͷΑ͏ͳ՝ʹର͢ΔΫοΫύουͷऔΓΈΛհ͠·͢ɻz ՝ͷڞ༗ ղܾࡦͷྻڍͱੳ
ʰΛࢭΊͳ͍ػցֶशͷΓํʱ ػցֶशʹऔΓΉݱʹ͓͚Δ՝Λࢦఠ͠ɺੳ͠·͢ɻ
ΞδΣϯμ ͡ΊʹਓೳϒʔϜͱݬ໓ظ ΛࢭΊͳ͍ػցֶशͷΓํʙ৫ɾνʔϜฤʙ αʔϏε։ൃͱػցֶश ػցֶशϓϩδΣΫτ
ΛࢭΊͳ͍ػցֶशͷΓํʙݸਓฤʙ ૯߹֨ಆٕͱͯ͠ͷػցֶश
ਓೳϒʔϜͱݬ໓ظ
ਓೳϒʔϜ ʰୈ࣍ਓೳϒʔϜʱ ը૾ྨʹ͓͚ΔਂֶशͷՌΛ͖͔͚ͬͱ͢Δ ਓೳ࣮ݱͷखஈͷ̍ͭͱͯ͠ػցֶशͷࢿʗظߴ·Δ ϋʔυΣΞʗιϑτΣΞʹ͔͔ΘΒͣ͋ΒΏΔྖҬʹԠ༻͞ΕΑ ͏ͱ͍ͯ͠Δ
ΫοΫύουͷ༷ͳαʔϏε։ൃͷݱྫ֎Ͱͳ͍
IUUQXXXHBSUOFSDPKQQSFTTIUNMQSIUNM
ϒʔϜ͔Βݬ໓ظ "*ʹظ͕աʹൃͨ͠ͷͪʰౙʱ͕๚ΕΔͱ͍͏ྺ࢙͕͋Δ ݬ໓ظΛΓӽ͍ͯͨ͘Ίʹݱͷզʑ͕͖͢͜ͱ ʰΛࢭΊͳ͍ػցֶशͷΓํʱ ࠓճɺαʔϏε։ൃݱͱͯ͠ͷΫοΫύουͱ͍͏ڥͰಘΒΕ ͨݟΛத৺ʹɺ͜ͷ՝ʹ͍ͭͯߟ͍͖͑ͯ·͢
ΛࢭΊͳ͍ػցֶशͷΓํ ৫ɾνʔϜฤ
ΞδΣϯμ ͡ΊʹਓೳϒʔϜͱݬ໓ظ ΛࢭΊͳ͍ػցֶशͷΓํʙ৫ɾνʔϜฤʙ αʔϏε։ൃͱػցֶश ػցֶशϓϩδΣΫτ
ΛࢭΊͳ͍ػցֶशͷΓํʙݸਓฤʙ ૯߹֨ಆٕͱͯ͠ͷػցֶश ͡ΊʹਓೳϒʔϜͱݬ໓ظ ΛࢭΊͳ͍ػցֶशͷΓํʙ৫ɾνʔϜฤʙ αʔϏε։ൃͱػցֶश ػցֶशϓϩδΣΫτ ΛࢭΊͳ͍ػցֶशͷΓํʙݸਓฤʙ ૯߹֨ಆٕͱͯ͠ͷػցֶश
αʔϏε։ൃͱػցֶश αʔϏε։ൃͰػցֶशΛ͍͍ͨͱ͍͏χʔζ͕૿͍͑ͯΔ ਓೳϒʔϜʹґΔͱ͜Ζ͕େ͖͍ ଟ ʰػցֶशΛ͏ʱͱʁ
՝ൃݟ ΰʔϧઃఆ σʔλऩू σʔλՃ ੳ &%" ֶश ධՁݕূ ຊ൪ ධՁݕূ
͏ ࡞Δ ՝ൃݟ ΰʔϧઃఆ σʔλऩू σʔλՃ ੳ &%" ֶश ධՁݕূ
ຊ൪ ධՁݕূ σ ϓ ϩ Π
ྫϞσϧͷ"1*Խʹඞཁͳͷ ֶशࡁΈϞσϧ ͷEVNQ NPEFM\QC I ^ "1* BQQQZ
)551 T &OEQPJOU QSFEJDU JOGPͱ͔ ϞσϧͷಡΈࠐΈͱ*0ϋϯυϥ ࡞ۀ طଘγεςϜʗΠϯϑϥͷΠϯςάϨʔγϣϯ -#ɺϞχλϦϯάɺ%/4ʑ ࣮ߦڥ %PDLFSpMF
ྫϞσϧͷ"1*Խʹඞཁͳͷ ֶशࡁΈϞσϧ ͷEVNQ NPEFM\QC I ^ "1* BQQQZ
)551 T &OEQPJOU QSFEJDU JOGPͱ͔ ϞσϧͷಡΈࠐΈͱ*0ϋϯυϥ ࡞ۀ طଘγεςϜʗΠϯϑϥͷΠϯςάϨʔγϣϯ -#ɺϞχλϦϯάɺ%/4ʑ ࣮ߦڥ %PDLFSpMF ػցֶशϞσϧͷσϓϩΠʹ खؒͱ͕͔͔࣌ؒΔ
def is_food_image(self, image_io): image = Image.open(image_io) result = self.classifier.infer(image) return
result == Category.food ར༻ྫྉཧ͖Ζ͘ͷ߹ ύοέʔδԽ͞ΕͨػցֶशϞσϧͷݺͼग़͠ ͋Δ͍҉ͳ"1*ίʔϧ
def is_food_image(self, image_io): image = Image.open(image_io) result = self.classifier.infer(image) return
result == Category.food ྫྉཧ͖Ζ͘ͷ߹ ύοέʔδԽ͞ΕͨػցֶशϞσϧͷݺͼग़͠ ͋Δ͍҉ͳ"1*ίʔϧ έʔεʹΑΔ͕ αʔϏε։ൃͱ͍͏จ຺ʹ͓͍ͯ ػցֶशϞσϧίʔυͰ࣮͞ΕͨϩδοΫ ͱಉʹѻΘΕ͏Δ
͏ ࡞Δ ϨγϐྨثͷΧςΰϦʹ ʰຑം౾ʱΛͯ͠Έ͍ͨ िؒ͘Β͍͔͔Δͳ Ϛδ͔ʂ if category == 'ΧϨʔ':
foo() + elif category == 'ຑം౾': + bar() ՝ൃݟ ΰʔϧઃఆ σʔλऩू σʔλՃ ੳ &%" ֶश ධՁݕূ ຊ൪ ධՁݕূ
αʔϏε։ൃͱϞσϧͷ։ൃʗσϓϩΠ ͷεϐʔυײʹΪϟοϓ͕͋Δ
Ͳ͏͢Εʁ ਓࡐஔͷ࠷దԽ
͏ ࡞Δ ϨγϐྨثͷΧςΰϦʹ ʰຑം౾ʱΛͯ͠Έ͍ͨ िؒ͘Β͍͔͔Δͳ Ϛδ͔ʂ if category == 'ΧϨʔ':
foo() + elif category == 'ຑം౾': + bar() ՝ൃݟ ΰʔϧઃఆ σʔλऩू σʔλՃ ੳ &%" ֶश ධՁݕূ ຊ൪ ධՁݕূ
͏ ࡞Δ ϨγϐྨثͷΧςΰϦʹ ʰຑം౾ʱΛͯ͠Έ͍ͨ िؒ͘Β͍͔͔Δͳ Ϛδ͔ʂ if category == 'ΧϨʔ':
foo() + elif category == 'ຑം౾': + bar() ՝ൃݟ ΰʔϧઃఆ σʔλऩू σʔλՃ ੳ &%" ֶश ධՁݕূ ຊ൪ ධՁݕূ
ਓࡐஔͷ࠷దԽ αʔϏε։ൃʹػցֶशΛԠ༻͢Δ͜ͱʹෆ׳Εͳݱͷ߹ αʔϏε։ൃʹٻΊΒΕΔ։ൃεϐʔυͱ ػցֶशϞσϧͷ։ൃͱσϓϩΠʹ͔͔Δ࣌ؒ ྆ऀʹΪϟοϓ͕͋Δɺͱ͍͏Λڞ༗ͯ͠าΈدΔ
ྫ͑ਓతϦιʔεͷஔΛݟͯ͠ΈΔ ྫɿαʔϏε։ൃଆͷΤϯδχΞ͕ϞσϧͷσϓϩΠΛख͏
Ͳ͏͢Εʁ ਓࡐஔͷ࠷దԽ औΓΉͷݟ͠ Ϟσϧ։ൃʗσϓϩΠͷޮԽ
Ͳ͏͢Εʁ ਓࡐஔͷ࠷దԽ औΓΉͷݟ͠ Ϟσϧ։ൃʗσϓϩΠͷޮԽ ։ൃεϐʔυͷҧ͍ػցֶशಛ༗ͷίετΛՃຯ্ͨ͠Ͱɺ ػցֶशΛར༻ͯ͠औΓΉ͖ͳͷ͔ߟ͑ͳ͓͢ IUUQTSFTFBSDIHPPHMFDPNQVCTQVCIUNM
ʰػցֶशٕज़తෛ࠴ͷߴརି͠ ҙ༁ ʱ
Ͳ͏͢Εʁ ਓࡐஔͷ࠷దԽ औΓΉͷݟ͠ Ϟσϧ։ൃʗσϓϩΠͷޮԽ
Ϟσϧ։ൃʗσϓϩΠͷޮԽ ։ൃσʔλͷੳɺ࣮ݧɺϞσϧͷֶश σϓϩΠύοέʔδԽɺ"1*Խ
Ϟσϧ։ൃʗσϓϩΠͷޮԽ ։ൃσʔλͷੳɺ࣮ݧɺϞσϧͷֶश σϓϩΠύοέʔδԽɺ"1*Խ
ػցֶशج൫ ػցֶशʹؔΘΔ࣮ݧ։ൃͷεϐʔυΛ্͛Δҝͷج൫ ΫοΫύουݚڀ։ൃ෦෦ࣗͰੵۃతʹվળ͍ͯ͠Δ IUUQTTQFBLFSEFDLDPNBZFNPTNBDIJOF MFBSOJOHQMBUGPSNBUDPPLQBE IUUQTTQFBLFSEFDLDPNBZFNPTBDDFMFSBUF NBDIJOFMFBSOJOHXJUIBXT
ΦϯσϚϯυ(16࣮ݧڥ
ΦϯσϚϯυ(16࣮ݧڥ ւ֎ؚΊ໊ͷϝϯόʔ͕͍Δ ෳͷϓϩδΣΫτʹෳͷਓ͕औΓΉ ࣮ݧ༻ͷܭࢉػڥΛͲͷΑ͏ʹ༻ҙ͢Δ͔ $IBUCPUܦ༝ͰىಈఀࢭՄೳͳΦϯσϚϯυ(16࣮ݧڥ
ʰ࣮ݧ༻Πϯελϯε࡞ͬͯʱ ઃఆࡁΈΠϯελϯεͷ εφοϓγϣοτ ".* ATTIBZFNPTXPSLCFODIEOTDPNQBOZA $SFBUF
ʰ࣮ݧ༻Πϯελϯε࡞ͬͯʱ ઃఆࡁΈΠϯελϯεͷ εφοϓγϣοτ ".* ATTIBZFNPTXPSLCFODIEOTDPNQBOZA $SFBUF IUUQTTQFBLFSEFDLDPNBZFNPTNBDIJOF
MFBSOJOHQMBUGPSNBUDPPLQBE ৄ͘͠
ϓϩδΣΫτςϯϓϨʔτ ʹΑΔ࣮ݧ࠶ݱੑͷ্
ྫͷϓϩδΣΫτͷ ࣮ݧ͕͍ͨ͠ OPUFCPPLͱεΫϦϓτϨϙδτϦʹɺ σʔλࠓखݩʹ͔͠ͳ͍ʜ ͍
࣮ݧ࠶ݱੑͷԼ ͍͍ͭͭ࠶ݱੑͷͳ͍ঢ়ଶΛ࡞ͬͯ͠·͏ ϫʔΫϑϩʔཧͱ͔େֻ͔Γͳͷͪΐͬͱʜ
$PPLJFDVUUFSʹΑΔςϯϓϨʔτԽ ϓϩδΣΫτͷςϯϓϨʔτԽ SVCZʹCVOEMFS͕͋Δ͚Ͳʜ IUUQTHJUIVCDPNBVESFZSDPPLJFDVUUFS 1ZUIPO +JOKB
ͷ൚༻ͳϓϩδΣΫτςϯϓϨʔτੜπʔϧ ಠࣗͷςϯϓϨʔτΛΉ͜ͱ͕ग़དྷɺσʔλαΠΤϯε༻ͷ͋Δ IUUQTHJUIVCDPNESJWFOEBUBDPPLJFDVUUFSEBUBTDJFODF
ESJWFOEBUBDPPLJFDVUUFSEBUBTDJFODF A.BLFpMFA֤छศརUBSHFUͱ͔ઃఆͱ͔ ASFRVJSFNFOUTUYUAґଘϥΠϒϥϦͷϦετ ֤छطσΟϨΫτϦ ATSDEBUBA ATSDNPEFMAͦΕͧΕσʔλͷੜʗલॲཧ༻ɺ
Ϟσϧͷֶश༻εΫϦϓτΛஔ͘ AEBUBAHJUJHOPSF͞ΕΔɺ.BLFpMFͷUBSHFUͰ4ͱTZOD
ྫͷϓϩδΣΫτͷ ࣮ݧ͕͍ͨ͠ HJUDPQBOZDPNSFTFBSDISFDJQFBOBMZTJT ͜͜ʙ HJUDMPOF NBLFTZOD@EBUB@GSPN@T
EPDLFSTDJFODFDPPLJFDVUUFSEPDLFSTDJFODF IUUQTHJUIVCDPNEPDLFSTDJFODFDPPLJFDVUUFSEPDLFS TDJFODF EPDLFSΛར༻͠ɺϓϩδΣΫτͷ࣮ݱੑΛ͞ΒʹߴΊΔ OPUFCPPLͷ্ཱͪ͛ 1PSUGPSXBSEߦ͏UBSHFU
Ϟσϧ։ൃʗσϓϩΠͷޮԽ ։ൃσʔλͷੳɺ࣮ݧɺϞσϧͷֶश ΫϥυڥΛ׆͔ͨ͠ΦϯσϚϯυ(16࣮ݧڥͷ࣮ݱ ϓϩδΣΫτͷςϯϓϨʔτԽʹΑΔ࣮ݧ࠶ݱੑͷ্ σϓϩΠύοέʔδԽɺ"1*Խ
Ϟσϧ։ൃʗσϓϩΠͷޮԽ ։ൃσʔλͷੳɺ࣮ݧɺϞσϧͷֶश ΫϥυڥΛ׆͔ͨ͠ΦϯσϚϯυ(16࣮ݧڥͷ࣮ݱ ϓϩδΣΫτͷςϯϓϨʔτԽʹΑΔ࣮ݧ࠶ݱੑͷ্ σϓϩΠύοέʔδԽɺ"1*Խ
ػցֶशϞσϧͷσϓϩΠ ͱ αʔόʔͷຒΊࠐΈʗύοέʔδʗ"1*
ػցֶशϞσϧͷσϓϩΠ ͱ αʔόʔͷຒΊࠐΈʗύοέʔδʗ"1* ϞσϧΛಡΈࠐΜͰɺ֎෦ϦΫΤετʹԠͯ͡ϞσϧΛ ݺͼग़͢ബ͘খ͞ͳ"1*Λ࣮͢Δ
"1* .JDSPTFSWJDF ͕͍͍ཧ༝ ͦͷଞͷख๏ ྫ͑ΞϓϦαʔόʔͷΈࠐΈ ͱൺͯ ػցֶशϞσϧͷσϓϩΠख๏ͱͯ͠ద͍ͯ͠Δཧ༝
"1* .JDSPTFSWJDF ͕͍͍ཧ༝ ػցֶशͱΞϓϦͰҟͳΔ࣮ߦڥ͕ར༻Ͱ͖Δ ҟͳΔݴޠɺ$16(16 "1*ͷεέʔϧʹΑͬͯߴεϧʔϓοτͷ࣮ݱՄೳ
ػցֶशϞσϧʹΑΔਪॏ͍ ྨثɺͷϓϦϛςΟϒͳػೳͷ࠶ར༻ ։ൃʹ͓͚Δ୲ൣғͷڥքઢͱͯ͠࠷ద ͩͱࢥ͏
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