異常検知ライブラリを作った話

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ҟৗݕ஌ϥΠϒϥϦ Λ࡞ͬͨ࿩ ۝भ %BUB4DJFOUJTU.FFU6Q

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ࣗݾ঺հ ௽ా തจ ʢ!UTVSVCFFʣ ΤϯδχΞྺɿ ೥ͪΐ͍ େֶͷઐ߈͸Խֶ લ৬͸ফ๷࢜ झຯ͸ےτϨ ʢಛʹϕϯνϓϨεʣ

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ࠓճͷ಺༰͸ɾɾ ೥൒લʹθϩ͔ΒϓϩάϥϛϯάΛ࢝Ίͨࢲ͕ɺ ϊϦͱؾ߹͍Ͱҟৗݕ஌ϥΠϒϥϦΛ࡞ͬͨ࿩ ɾҟৗݕ஌ʹ͍ͭͯ ɾϥΠϒϥϦΛ࡞ͬͨഎܠ ɾ࣮૷ΞϧΰϦζϜ ɾϦΞϧλΠϜҟৗ؂ࢹͷσϞ ͳͲͳͲɾɾ

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ҟৗݕ஌ͱ͸ʁ

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େଟ਺ͷσʔλͱ͸ৼΔ෣͍͕ ҟͳΔσʔλΛݕग़͢Δٕज़ σʔλϚΠχϯά نଇੑ ҟৗ σʔλͷࢁ

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ҟৗݕ஌ͷԠ༻ྫ ίϯϐϡʔλ΢Πϧε΍%PT߈ܸͷૣظൃݟ ηΩϡϦςΟ෼໺ ނো༧ஹݕ஌ ػց෼໺ ྲྀߦͷݕ஌ɾ৽τϐοΫͷൃݟɾ ϢʔβߦಈͷมԽݕ஌ ϚʔέςΟϯά෼໺

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ҟৗσʔλྫ ʙͦͷ̍

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ҟৗσʔλྫ ʙͦͷ̍ ҟৗʂ

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ҟৗʂ if value > 120: print('ERROR!') JGจͰݕ஌Ͱ͖ͦ͏ʂ ҟৗσʔλྫ ʙͦͷ̍

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ҟৗσʔλྫ ʙͦͷ̎

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Կ͔ҟৗ͕ى͖ͯΔ ҟৗʹ΋͍Ζ͍Ζ͋Δ ҟৗσʔλྫ ʙͦͷ̎

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ҟৗݕ஌ͷ෼ྨ ֎Ε஋ݕ஌ มԽ఺ݕ஌ ҟৗݕ஌ ٸܹͳৼΔ෣͍ͷมԽΛݕ஌ ࣌ܥྻϞσϧ ଞͱ͸େ͖͘ҟͳΔ஋Λݕ஌ ಠཱϞσϧ

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ҟৗݕ஌ͷ෼ྨ ֎Ε஋ݕ஌ มԽ఺ݕ஌ ҟৗݕ஌ ࠓճ͸ίονͷ࿩ʂ ٸܹͳৼΔ෣͍ͷมԽΛݕ஌ ࣌ܥྻϞσϧ ଞͱ͸େ͖͘ҟͳΔ஋Λݕ஌ ಠཱϞσϧ

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ҟৗݕ஌ϥΠϒϥϦ ʹ͍ͭͯ

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ͳͥ࡞͔ͬͨ ͍ͭͷ೔͔ɺٕज़Λ࢖͍͜ͳ͢ଆͰ͸ͳ͘ ࡞ΔଆʹͳΓ͍ͨ ϚΠϯυతഎܠ σʔλαΠΤϯεతഎܠ Ϗδωεͷݱ৔ʹᷓΕΔ࣌ܥྻσʔλ ʢྫ͑͹ɺച্σʔλɾΞΫηεϩάͳͲʣ ͷมԽͷஹީΛ͍ͪૣ͘ݕ஌͍ͨ͠

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࡞ͬͨ΋ͷ ಛ௃ʢڧΈʣ͸Կʁ #BOQFJʢ൪ฌʣ ɿ1ZUIPO੡ҟৗݕ஌ύοέʔδ "ಛҟεϖΫτϧม׵ʹΑΔ࣌ܥྻσʔλͷมԽ఺ݕ஌ ಛఆͷ֬཰෼෍ΛԾఆ͍ͯ͠ͳ͍ͨΊɺ ᶃଟ༷ͳมԽʹؤڧʹରԠͰ͖ɺ ᶄύϥϝʔλνϡʔχϯά͕༰қͳ มԽ఺ݕ஌͕Մೳ

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ಛҟεϖΫτϧม׵ ࣌ࠁ ཤྺߦྻ" ςετߦྻ# ओ෦෼ۭؒ ",''', ( ",''', ( มԽ౓ શମΠϝʔδ ʮೖ໳ػցֶशʹΑΔҟৗݕ஌ ʕ3ʹΑΔ࣮ફΨΠυʯͷਤ Λࢀߟʹ࡞੒ աڈଆͱݱࡏଆͷߦྻಉ࢜ͷ৯͍ҧ͍ͷେ͖͞ΛఆྔԽ

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มԽ౓ͷఆٛ ಛҟ஋෼ղʹΑΔಛ௃ύλʔϯͷநग़ 9 6 7 ಛҟ஋্ҐͷࠨಛҟϕΫτϧΛ NຊऔΓग़͢ աڈଆ ݱࡏଆ ( ͷ࠷େಛҟ஋) 4 ֊਺SΛ΋ͭNºOߦྻ9 N O S S O S มԽ౓

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#BOQFJͷ࢖͍ํ ҟৗݕ஌ ϋΠύʔύϥϝʔλʢXʣɿεϥΠυ૭ͷαΠζ ΠϯϓοτʢEBUBʣϦετܕ΍/VN1Z BSSBZͳͲͷσʔλ഑ྻ Ξ΢τϓοτʢSFTVMUTʣΠϯϓοτͱಉ͡αΠζͷ/VN1Z BSSBZ git clone https://github.com/tsurubee/banpei.git cd banpei pip install . Πϯετʔϧ import banpei model = banpei.SST(w=50) results = model.detect(data) ˞ͨͬͨ̏ߦʂ

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#BOQFJʹΑΔप೾਺ҟৗݕ஌

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#PLFIͱͷ࿈ܞʹΑΔ ϦΞϧλΠϜҟৗ؂ࢹ ΁ͷ௅ઓ

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#PLFIͱ͸ʁ IUUQTCPLFIQZEBUBPSHFOMBUFTU ɾ*OUFSBDUJWFWJTVBMJ[FUJPO ɾ/PWFMHSBQIJDT ɾ4USFBNJOH EZOBNJD MBSHFEBUB ɾ/POFFEUPXSJUF+BWBTDSJQU ର࿩ܕՄࢹԽ؀ڥΛఏڙ͢Δ1ZUIPOϥΠϒϥϦ IUUQTXXXTMJEFTIBSFOFUDPOUJOVVNJPIBTTMFGSFFEBUBTDJFODFBQQTXJUICPLFIXFCJOBS

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σ Ϟ

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• ʮಛҟεϖΫτϧม׵ʹΑΔप೾਺ҟৗݕ஌ʯ IUUQTZPVUVCFF'7/,"7U/1 • ʮಛҟεϖΫτϧม׵ʹΑΔ܏͖ͷมԽ఺ݕ஌ʯ IUUQTZPVUVCF@XPVC-"I9L :PV5VCFʹσϞಈըΛެ։͍ͯ͠·͢ʂ

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(JU)VCʹެ։͍ͯ͠·͢ʂ IUUQTHJUIVCDPNUTVSVCFFCBOQFJ

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ϒϩάॻ͍͍ͯ·͢ʂ IUUQTHJUIVCDPNUTVSVCFFCBOQFJ

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ࠓޙͷల๬ l ಛҟεϖΫτϧม׵ͷߴ଎ԽʹΑΔߋͳΔ ϦΞϧλΠϜੑͷ௥ٻ l ҟৗ௨஌ػೳͷ࣮૷ʹΑΔ࣮༻ੑͷ޲্ ͋ͱɺ৽ͨͳΞϧΰϦζϜ΋࣮૷͍ͨ͠ɾɾ

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1ZUIPOίϛϡχςΟ ʹ͍ͭͯ

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1Z'VLVPLB΍ͬͯ·͢ʂ ݄ʹ-5ΠϕϯτΛ։࠵༧ఆͰ͢ʂ

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1Z$PO ,ZVTIV΍Γ·͢ʂ ελοϑืूதʂ ڵຯ͕͋Δํ͸࠙਌ձͰ͓੠͔͚͍ͩ͘͞ʂ IUUQLZVTIVQZDPOKQ

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͝ਗ਼ௌ͋Γ͕ͱ͏ ͍͟͝·ͨ͠ʂ