DataStore, change labels in R2020a

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James Latshaw
James Latshaw 2021-12-13
编辑： Yongwon Jang 2023-7-20
Hello,
Is there a way to change all labels in an imageDataStore to an appended version of the current label?
I have my images saved in folders with the folder name being the label. Once I load these into an ImageDataStore, I would like to split them into two smaller datastores and then I would like to change each label to be "current label" + "_A".
In psudo code:
For every label in data store 1, rename to be label + "_A".
For every label in data store 2, rename to be label + "_B".
Is this possible?
Thank you!

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回答（1 个）

yanqi liu
yanqi liu 2021-12-14
Ran in:
yes，sir，may be use subset and string contract to generate，such as
imds = imageDatastore(fullfile(matlabroot,'toolbox','matlab'),...
'IncludeSubfolders',true,'FileExtensions','.tif','LabelSource','foldernames')
imds =
ImageDatastore with properties: Files: { '/MATLAB/toolbox/matlab/demos/example.tif'; '/MATLAB/toolbox/matlab/imagesci/corn.tif' } Folders: { '/MATLAB/toolbox/matlab' } Labels: [demos; imagesci] AlternateFileSystemRoots: {} ReadSize: 1 SupportedOutputFormats: ["png" "jpg" "jpeg" "tif" "tiff"] DefaultOutputFormat: "png" ReadFcn: @readDatastoreImage
imds.Labels=categorical(erase(string(imds.Labels), ' ') + repmat('_A', size(imds.Labels, 1), 1))
imds =
ImageDatastore with properties: Files: { '/MATLAB/toolbox/matlab/demos/example.tif'; '/MATLAB/toolbox/matlab/imagesci/corn.tif' } Folders: { '/MATLAB/toolbox/matlab' } Labels: [demos_A; imagesci_A] AlternateFileSystemRoots: {} ReadSize: 1 SupportedOutputFormats: ["png" "jpg" "jpeg" "tif" "tiff"] DefaultOutputFormat: "png" ReadFcn: @readDatastoreImage
  2 个评论
Paween Pongsomboon
Paween Pongsomboon 2022-4-1
@yanqi liu You save my life. Thank you. I'm gonna cry I have been struggled with this problem for three days and now you don't know how much I wanna hug you.
Yongwon Jang
Yongwon Jang 2023-7-20
编辑：Yongwon Jang 2023-7-20
Thank you. It was very helpful.
For my case, erased total labels and reassigned new labels.
I utilized it and edited for my purpose.
Indeed, You are angel.

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