Why does "splitEachLabel" function error when using an "augmented​ImageDatas​tore" as input?

I am using the "splitEachlabel" function to split my image data using the following code:

% create imageDatastore
imds = imageDatastore(fullfile(matlabroot, 'toolbox', 'matlab', {'demos','imagesci'}),...
'LabelSource', 'foldernames', 'FileExtensions', {'.jpg', '.png', '.tif'});

% create augmentedImageDatastore
auimds = augmentedImageDatastore([256 256 3],imds,'ColorPreprocessing','rgb2gray');

% splitEach label for imageDatastore
[imds60,imds40] = splitEachLabel(imds ,0.6);

% splitEach label for augmentedImageDatastore
[auimds60,auimds40] = splitEachLabel(auimds ,0.6);

This works for "imageDatastore" objects but when using "augmentedImageDatastore" objects, I receive the following error:

 

Incorrect number or types of inputs or outputs for function splitEachLabel.

How can I use "splitEachLabel" function for "augmentedImageDatastore"?

Answer 1

[MathWorks Support Team]

This is expected behaviour, the "augmentedImageDatastore" object does not have a object function named "splitEachLabel".

Please ensure that you split the data first, and then create the "augmentedImageDatastore" object. For example:

% create imageDatastoreimds = imageDatastore(fullfile(matlabroot, 'toolbox', 'matlab', {'demos','imagesci'}),...
'LabelSource', 'foldernames', 'FileExtensions', {'.jpg', '.png', '.tif'});

% splitEach label for imageDatastore
[imds60,imds40] = splitEachLabel(imds ,0.6);

% create augmentedImageDatastores
auimds60 = augmentedImageDatastore([256 256 3],imds60,'ColorPreprocessing','rgb2gray');
auimds40 = augmentedImageDatastore([256 256 3],imds40,'ColorPreprocessing','rgb2gray');