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Wantedly Peopleのスキャン画面の裏側 / Wantedly People Scanning Screen
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Shinichi Goto
May 31, 2017
Technology
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Wantedly Peopleのスキャン画面の裏側 / Wantedly People Scanning Screen
2017/05/31 Wantedly技術見学会 iOS編
Shinichi Goto
May 31, 2017
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Transcript
Wantedly Peopleͷ εΩϟϯը໘ͷཪଆ ɹ 2017/05/31 Wantedlyٕज़ݟֶձ iOSฤ shingt (Shinichi Goto)
@ Wantedly, Inc.
shingt (Shinichi Goto) GitHub: @shingt Twi5er: @_shingt
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Outline • εΩϟϯը໘ͷॲཧͷྲྀΕ • ٕज़ཁૉ / ߏ • ෆ҆ఆͳݕग़݁Ռͷରॲ •
σόοά൛ͷ
εΩϟϯը໘ͷॲཧͷྲྀΕ
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ٕज़ཁૉ / ߏ
• AVFounda*on • OpenCV • ίϯϐϡʔλϏδϣϯ༻ͷϥΠϒϥϦ • ໊ྖҬͷݕग़ɺͦͷଞը૾ॲཧʹར༻ • ಛผͳͷ͍ͬͯͳ͍
໊ݕग़ͷOpenCVҎ֎ͷબࢶ • CoreImage • Accerelate (BNNS) • Metal (CNN) •
TensorFlow
ݕग़ϩδοΫAndroidͱڞ௨Խ͍ͨ͠ ʢগͳ͘ͱॳظϦϦʔεͰʣ
=> Accerelate / Metal / CoreImage ݟૹΓ ʢલऀ2ͭiOS9Ͱར༻Ͱ͖ͳ͍ʣ
TensorFlow • ΞϓϦʹΈࠐΈɺผ్ֶशࡁͷϞσϧΛద༻ɺͱ͍͏ͱ͜Ζ ·Ͱࢼͨ͠ • ໊ݕग़෦ͷ࣮ࡍͷ׆༻ʹࢸΒͣ • ։ൃظؒɺσʔληοτɺਫ਼ͷ
༨ஊ: Google I/O '17 pod 'TensorFlow-experimental' ɹ • Android Meets
TensorFlow: How to Accelerate Your App with AI • "experimental" Ͱͳ͍ํ "Coming soon" ͱͳͬͯΔ • h?ps:/ /cocoapods.org/pods/TensorFlow
ߏ
ɹ • OpenCV • C++Ͱهड़͞ΕͨΠϯλʔϑΣΠεΛར༻ • => Swi/͔Βͷͷݺͼग़͠ෆՄ • ʢඞવతʹʣݕग़ؔ࿈ͷϩδοΫObjec3ve-C++ଆʹدͤΔ
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// CardDetector.mm - (NSArray<CardFeature *> *)cardFeaturesInMat:(const cv::Mat &)mat { std::vector<dtct::Card>
cards = ... // Detect cards on C++ layer NSMutableArray<CardFeature *> *cardFeatures = [NSMutableArray array]; for (const auto& card : cards) { if (!card.is_namecard) continue; CardFeature *cardFeature = [[CardFeature alloc] initWithDTCTCard:card]; [cardFeatures addObject:cardFeature]; } return cardFeatures; }
CardDetector • C++ͷϨΠϠͷProxyʹ͍ۙҐஔ • ࣮ࡍʹ͋Δఔը૾ॲཧϩδοΫؚΉ • ࠲ඪิਖ਼ɺಁࢹมɺetc. • σόΠεଆͰಈ͔ͯ͠ΈͯॳΊͯݟ͔ͭΔɺͱ͍͏͋ͬ ͨͨΊ
C++ͷϨΠϠ • Γग़ͯ͠։ൃ & ୯ಠͰϏϧυ • ΞϓϦશମΛϏϧυ͢Δͷʹൺͯѹతʹ͍ͨΊ • ݕग़෦ͷϩδοΫΛվળ͍͢͠ʢͬͱجຊతͳ෦ PythonͰ࣮ݧʣ
• దٓiOSϓϩδΣΫτऔΓࠐΈ
ෆ҆ఆͳݕग़݁Ռͷରॲ
໊ྖҬͷݕग़
AVCaptureStillImageOutput ʢ੩ࢭը༻ʣ OR AVCaptureVideoDataOutputʢಈը༻ʣ
໊εΩϟϯʹγϟολʔԻ໐Βͨ͘͠ͳ͍ => AVCaptureVideoDataOutput
: iPhone༳ΕΔ
=> ϒϨΔ
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ղܾࡦ: γʔέϯεͱͯ͠ѻ͏
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ݕग़݁Ռͷථ • ϑϨʔϜͷ໌ʢͲΕ͚ͩϒϨ͍ͯͳ͍͔ʣ • ϥϓϥγΞϯϑΟϧλΛ͔͚ͨ݁ՌͷࢄʢͰ͋ΔఔݟΕ Δʣ • ݕग़໊ຕ • ͲΕ͚ͩۙͷϑϨʔϜ͔
ࢀߟ: ໌ͷԋࢉ @implementation UIImage (CVExtension) - (double)sharpness { cv::Mat mat,
gray, laplacian; UIImageToMat(self, mat); cv::cvtColor(mat, gray, CV_BGR2GRAY); cv::Laplacian(gray, laplacian, CV_64F); cv::Scalar mean, stddev; cv::meanStdDev(laplacian, mean, stddev, cv::Mat()); return stddev.val[0] * stddev.val[0]; } @end
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τϥοΩϯά࣌
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ɹ • ݁ߏ҆ͳղܾࡦͰ͋Δ • ͱ͍͑ܶతʹମݧ্ !
σόοά൛ͷ
ϦΞϧλΠϜͳը૾ॲཧΞϓϦͷ։ൃͰࠔΔ͜ͱ • ൃੜ࣌ɺݱঢ়Ѳʹ͕͔͔࣌ؒΓ͍͢ • ϓϩηεͷͲͷ෦͕ѱ͍ͷ͔ • ઢݕग़ʁ࠲ඪมʁ໌ͷԋࢉʁ
Debug, QAͰ • ԋࢉঢ়گɺϦιʔεঢ়گΛදࣔ • ໌, γʔέϯεॲཧ, CPU, etc. •
ը૾ॲཧͷաఔΛදࣔ
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ɹ • ࢹ֮తʹ͔Γ͍ͨ͢ΊΛݟ͚͍ͭ͢ • ͍͚ͦ͏ײ͕CEOʹΘΔ
·ͱΊ • εΩϟϯը໘ͷॲཧͷྲྀΕ / ٕज़ཁૉ / ߏ Λհ • ෆ҆ఆͳݕग़݁Ռͷରॲ
=> γʔέϯεຖʹॲཧ • "ΊͪΌͪ͘ΌεϚʔτʂ" ͳ͜ͱͯ͠ͳ͍ʢݱঢ়ʣ • Debug/QA൛ͰॲཧաఔɺϦιʔεঢ়گΛग़͓ͯ͘͠ • ΓޙBlogͰެ։ʢ͢Δ͔ʣ
Thanks!