Can 'ValidationData' be used when training Semantic Segmentation?

How can validation data be used with Semantic Segmentation networks?

I have tried the following:

 datasourceTest = pixelLabelImageSource( imdsTest, pxdsTest);

and under training options I have added in:

 'ValidationData',datasourceTest,...

but I get the following:

Error using trainingOptions (line 187) The value of 'ValidationData' is invalid. Validation data must be a table, an ImageDatastore, or a cell array with input data and responses. Error in training (line 27) options = trainingOptions('sgdm', ...

Answer 1

[Tony Mackenzie]

Found my own solution:

This was not working for me on 2017b but I just downloaded 2018a and tested it out with my test data using:

enddatasourcetrain = pixelLabelImageSource( imdsTrain, pxdsTrain); datasourcetest = pixelLabelImageSource( imdsTest, pxdsTest); options = trainingOptions('sgdm', ... 'Momentum', .9, ... 'InitialLearnRate', 1e-2, ... 'MaxEpochs', 100, ... 'MiniBatchSize',8, ... 'Shuffle', 'every-epoch', ... 'VerboseFrequency', 2,... 'Plots','training-progress',... 'LearnRateDropFactor',0.1,... 'ValidationData', datasourcetest, ... 'LearnRateDropPeriod',100); Now it is working.