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Caffeでお手軽本格ディープラーニングiOSアプリ
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Takuya Matsuyama
October 13, 2015
Technology
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Caffeでお手軽本格ディープラーニングiOSアプリ
@potatotips #22
#DeepLearning #MachineLearning
Takuya Matsuyama
October 13, 2015
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Transcript
$B⒎FͰ͓खܰຊ֨ σΟʔϓϥʔχϯά J04ΞϓϦ 5",6:" !OPSBEBJLP QPUBUPUJQT
দࢁ w !OPSBEBJLP w ϑϦʔϥϯε ݩ:BIPP w J04ΞϓϦ ΣϒΞϓϦͳͲΛ੍࡞
w ػցֶशʹڵຯ͋Γ w ֆඳ͖·͢ 2
ΊΜ͖͖ ໙ར͖ 3
4 ໙ར͖ ࣸਅʹج͍ͮͯϥʔϝϯΛਪન͢ΔΞϓϦ ೖྗ
5 σΟʔϓϥʔχϯά ͷٕज़Λ༻ ʴ ʹ
ը૾ೝࣝʹڧ͍ ػցֶशΞϧΰϦζϜ 6 σΟʔϓϥʔχϯάͱ
w ͷਆܦߏΛ฿ͨ͠χϡʔϥϧωοτϫʔΫͷҰछ w େྔͷσʔλ͔ΒମͷಛΛࣗಈతʹֶश ‣ ͜Ε·Ͱಛͷநग़ํ๏ਓ͕͕ؒΜͬͯ༻ҙ͍ͯͨ͠ 7
࡞Ζ͏ σΟʔϓϥʔχϯάΞϓϦ ୭Ͱ؆୯ʹ࡞ΕΔํ๏Λ͝հ͠·͢ 8
$B⒎F σΟʔϓϥʔχϯά༻ ϑϨʔϜϫʔΫ w IUUQDB⒎FCFSLFMFZWJTJPOPSH w (16ԋࢉ $6%" ͰߴʹֶशͰ͖Δ w
͙͢ʹࢼͤΔֶशࡁΈϞσϧ͋Δ w .BD049ରԠ 9
Caffe for J04্Ͱಈ͘$B⒎F w IUUQTHJUIVCDPNBMFQIDB⒎F w $B⒎FͷGPSL w J04্Ͱࣝผॲཧ͕࣮༻ʹ͑ΔͰಈ͔ͤΔ ‣
J1IPOFTͰʙඵ w αʔό͍ΒͣͰ͑Δ w ͨͩ͠9$PEF·ͩඇରԠ 10
$B⒎FGPSJ04 αϯϓϧ࡞Γ·ͨ͠ w IUUQTHJUIVCDPNOPSBEBJLP DB⒎FJPTTBNQMF w ୯७ͳମೝࣝ w #-7$$B⒎F/FU.PEFMΛ༻ 11
demo
༻͢Δσʔλ w MBCFMTUYUࣝผ݁ՌΛ໊લʹม͢ΔͨΊͷҰཡ w EFQMPZQSPUPUYUωοτϫʔΫఆٛ w NFBOCJOBSZQSPUPฏۉը૾ w CWMD@SFGFSFODF@DB⒎FOFUDB⒎FNPEFMֶशࡁΈσʔλ 13
ॲཧͷྲྀΕ ࣝผରͷը૾ͷಡΈࠐΈ w ૾ͷը૾ $MBTTJpFSΫϥεͷॳظԽ w ͭͷϞσϧσʔλͷϑΝΠϧύεΛࢦఆ $MBTTJpFSͷ࣮ߦ w ը૾Λࢦఆͯ݁͠ՌΛऔಘ
ࣝผ݁Ռͷग़ྗ 14
UIImage* image = [UIImage imageNamed:@"sample.jpg"]; cv::Mat src_img, img; UIImageToMat(image, src_img);
cv::cvtColor(src_img, img, CV_RGBA2BGRA); ը૾ͷಡΈࠐΈ w 6**NBHFΛಡΈࠐΈ w DW.BUܗࣜʹม w ΧϥʔྻΛ3(#"͔Β#(3"ʹม
// ϑΝΠϧύεΛstringܕʹม string model_file_str = std::string([model_file UTF8String]); string label_file_str =
std::string([label_file UTF8String]); string trained_file_str = std::string([trained_file UTF8String]); string mean_file_str = std::string([mean_file UTF8String]); Classifier classifier = Classifier(model_file_str, trained_file_str, mean_file_str, label_file_str); $MBTTJpFSͷॳظԽ w ϞσϧఆٛɺϥϕϧɺֶशࡁΈϞσϧɺฏۉը૾ͷύεΛऔಘ w ֤ϑΝΠϧύεΛTUETUSJOHʹม w $MBTTJpFSͷΠϯελϯεΛ࡞
// ࣝผͷ࣮ߦ std::vector<Prediction> result = classifier.Classify(img); $MBTTJpFSͷ࣮ߦ w ը૾Λࢦఆ͢Δ͚ͩʂ
for (std::vector<Prediction>::iterator it = result.begin(); it != result.end(); ++it) {
NSString* label = [NSString stringWithUTF8String:it->first.c_str()]; NSNumber* probability = [NSNumber numberWithFloat:it->second]; NSLog(@"label: %@, prob: %@", label, probability); } ࣝผ݁Ռͷग़ྗ w TUEWFDUPSܗࣜͰෳͷࣝผީิ͕ಘΒΕΔ w JUFSBUPSͰճ֤ͯ͠ީิΛऔಘ w JUpSTUϥϕϧɺJUTFDPOE֬
·ͱΊ w $B⒎FΛ͑ΦϦδφϧͷֶशϞσϧ͕࡞ΕΔ w $B⒎FGPSJ04ͳΒαʔό͍ΒͣͰࣝผॲཧ͕ग़དྷΔ w αϯϓϧϓϩδΣΫτͷ͝հ w ΦϦδφϧͷֶशϞσϧͰΞϓϦΛ࡞Ζ͏ʂ 19
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ 20