How can I add new images to a trained deep learning network to classify new images ?
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Hi,
I used the following code to train a network for image classification. I want to know how can I keep training the new network with the already added images ?
imds = imageDatastore('Images','IncludeSubfolders',true,'LabelSource','foldernames');
[imdsTrain,imdsValidation] = splitEachLabel(imds,0.7,'randomized');
net = resnet18;
numClasses = numel(categories(imdsTrain.Labels));
lgraph = layerGraph(net);
newFCLayer = fullyConnectedLayer(numClasses,'Name','new_fc','WeightLearnRateFactor',10,'BiasLearnRateFactor',10);
lgraph = replaceLayer(lgraph,'fc1000',newFCLayer);
newClassLayer = classificationLayer('Name','new_classoutput');
lgraph = replaceLayer(lgraph,'ClassificationLayer_predictions',newClassLayer);
inputSize = net.Layers(1).InputSize;
augimdsTrain = augmentedImageDatastore(inputSize(1:2),imdsTrain);
augimdsValidation = augmentedImageDatastore(inputSize(1:2),imdsValidation);
options = trainingOptions('sgdm', ...
'MiniBatchSize',10, ...
'MaxEpochs',8, ...
'InitialLearnRate',0.0001, ...
'Shuffle','every-epoch', ...
'ValidationData',augimdsValidation, ...
'ValidationFrequency',8, ...
'Verbose',false, ...
'Plots','training-progress');
trainedNet = trainNetwork(augimdsTrain,lgraph,options);
YPred = classify(trainedNet,augimdsValidation);
accuracy = mean(YPred == imdsValidation.Labels)
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Chetan Gupta
le 13 Juil 2021
Hi Thushyanthan,
I understand that you intend to train the neural network with imdsTrain for a larger number of iterations. You can do that by increasing the ‘MaxEpochs’ value in trainingOptions to some value larger than 8.
You can refer to Options for training deep learning neural network - MATLAB trainingOptions (mathworks.com) for more information about Epochs and other training options.
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