How can we use splitEachLabel for augmented image datastores?

Question

Jasmine Ershov 2019-3-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/447759-how-can-we-use-spliteachlabel-for-augmented-image-datastores

评论： Oluwatobi John Oluwafemi 2021-2-21

I am trying to use the splitEachLabel function in MATLAB on an augmented image datastore, but I get the following error:

Undefined function 'splitEachLabel' for input arguments of type 'augmentedImageDatastore'

I know that this works for normal image datastores, but what can I do to either make splitEachLabel work or get another function to have the same effect? I have looked all over the MATLAB documentation, but I cannot find a solution to this.

Here is my code:

% Create augmented image datastore auds for already existing datastore ds
auds = augmentedImageDatastore([227 227], ds);
% Get the training images and the test images
[trainImgs,testImgs] = splitEachLabel(auds, 0.6);

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Answer 1

Shivam Gupta 2019-3-7

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https://ww2.mathworks.cn/matlabcentral/answers/447759-how-can-we-use-spliteachlabel-for-augmented-image-datastores#answer_364246

在 MATLAB Online 中打开

splitEachLabel function splits ImageDatastore labels by proportion. As you have augumented the image data store into augmentedImageDatastore, you can try partitioning it using partitionByIndex.

Suppose there are 5 observations in auds.

To assign 3 observations in auds1 use vector [1:3]

To assign rest 2 observations in auds2 use vector [4:5]

imds=imageDatastore(pathToDirectory,'LabelSource', 'foldernames', 'FileExtensions', {'.gif'});
auds = augmentedImageDatastore([227 227], imds);
auds1 = partitionByIndex(auds,[1:3]);
auds2 = partitionByIndex(auds,[4:5]);