%?加載數(shù)據(jù)
unzip（‘MerchData.zip‘）;
imds?=?imageDatastore（‘MerchData‘...
????‘IncludeSubfolders‘true...
????‘LabelSource‘‘foldernames‘）;
%?劃分?jǐn)?shù)據(jù)集
[imdsTrainimdsValidation]?=?splitEachLabel（imds0.7‘randomized‘）;
%?顯示數(shù)據(jù)集的一些圖像
numTrainImages?=?numel（imdsTrain.Labels）;
idx?=?randperm（numTrainImages16）;
figure
for?i?=?1:16
????subplot（44i）
????I?=?readimage（imdsTrainidx（i））;
????imshow（I）
end
%?加載預(yù)訓(xùn)練網(wǎng)絡(luò)
net?=?alexnet;
analyzeNetwork（net）
inputSize?=?net.layers（1）.InputSize
%?替換最終層
layersTransfer?=?net.layers（1:end-3）;
numClasses?=?numel（categories（imdsTrain.Labels））
layers?=?[
????layersTransfer
????fullyConnectedlayer（numClasses‘WeightLearnRateFactor‘20‘BiasLearnRateFactor‘20）
????softmaxlayer
????classificationlayer];
%?開始訓(xùn)練網(wǎng)絡(luò)
pixelRange?=?[-30?30];
imageAugmenter?=?imageDataAugmenter（?...
????‘RandXReflection‘true?...
????‘RandXTranslation‘pixelRange?...
????‘RandYTranslation‘pixelRange）;
augimdsTrain?=?augmentedImageDatastore（inputSize（1:2）imdsTrain?...
????‘DataAugmentation‘imageAugmenter）;
augimdsValidation?=?augmentedImageDatastore（inputSize（1:2）imdsValidation）;
options?=?trainingOptions（‘sgdm‘?...
????‘MiniBatchSize‘10?...
????‘MaxEpochs‘6?...
????‘InitialLearnRate‘1e-4?...
????‘Shuffle‘‘every-epoch‘?...
????‘ValidationData‘a(chǎn)ugimdsValidation?...
????‘ValidationFrequency‘3?...
????‘Verbose‘false?...
????‘Plots‘‘training-progress‘）;
netTransfer?=?trainNetwork（augimdsTrainlayersoptions）;
%?對(duì)圖像進(jìn)行分類
idx?=?randperm（numel（imdsValidation.Files）4）;
figure
for?i?=?1:4
????subplot（22i）
????I?=?readimage（imdsValidationidx（i））;
????imshow（I）
????label?=?YPred（idx（i））;
????title（string（label））;
end
%?分類準(zhǔn)確度
YValidation?=?imdsValidation.Labels;
accuracy?=?mean（YPred?==?YValidation）

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-08-25?10:03??code\
?????文件????????1844??2019-07-25?19:47??code\AlexNet.m
?????目錄???????????0??2019-08-25?10:03??code\MerchData\
?????目錄???????????0??2019-08-25?10:03??code\MerchData\MathWorks?Cap\
?????文件????????6070??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_0.jpg
?????文件????????4472??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_123.jpg
?????文件????????3997??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_148.jpg
?????文件????????5023??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_173.jpg
?????文件????????5427??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_198.jpg
?????文件????????5410??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_222.jpg
?????文件????????5003??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_247.jpg
?????文件????????4696??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_272.jpg
?????文件????????4220??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_297.jpg
?????文件????????5266??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_321.jpg
?????文件????????5436??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_346.jpg
?????文件????????5160??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_371.jpg
?????文件????????5801??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_49.jpg
?????文件????????5136??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_74.jpg
?????文件????????4819??2016-12-07?13:41??code\MerchData\MathWorks?Cap\Hat_99.jpg
?????目錄???????????0??2019-08-25?10:03??code\MerchData\MathWorks?Cube\
?????文件????????6609??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_0.jpg
?????文件????????6539??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_1099.jpg
?????文件????????4746??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_120.jpg
?????文件????????7362??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_1300.jpg
?????文件????????5050??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_1402.jpg
?????文件????????6531??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_1503.jpg
?????文件????????5911??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_189.jpg
?????文件????????5304??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_29.jpg
?????文件????????6614??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_390.jpg
?????文件????????7670??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_492.jpg
?????文件????????5494??2016-12-07?13:41??code\MerchData\MathWorks?Cube\MathWorks?cube_593.jpg
............此處省略52個(gè)文件信息