Question on imageDataStore syntax and parameters

Question

Kingsley Chan 2017-7-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/349206-question-on-imagedatastore-syntax-and-parameters

评论： Sarhan 2020-4-11

采纳的回答： Grzegorz Knor

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Hi all, I face some problems with imageDataStore function. Can anyone please explain the syntax or parameter involved?

First example:

imds = imageDatastore(fullfile(matlabroot,'toolbox','matlab'),...
'IncludeSubfolders',true,'FileExtensions','.tif','LabelSource','foldernames')

What means by 'true', what's the effect of 'File Extensions' selected, and what's 'LabelSources' and 'foldernames' refer to?

Second example:

outputFolder = fullfile(tempdir, 'caltech101');
rootFolder = fullfile(outputFolder, '101_ObjectCategories');
categories = {'airplanes', 'ferry', 'laptop'};
imds = imageDatastore(fullfile(rootFolder, categories), 'LabelSource', 'foldernames');

Is there any relationships between 'LabelSources' and 'foldernames' with 'rootFolder' and 'categories'?

Thank you in advanced.

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Sarhan 2020-4-11

Hi Every body: ImageDatastore does not read all the subfolders in the root directory 'junk', it only reads the first subdirectory in 'junk' Using the statement

>> imdsx=imageDatastore(fullfile('C:\Users', 'sarhan', 'Desktop', 'junk'),'IncludeSubfolders' , 1, 'LabelSource','foldernames')

Any answers would be appreciated.

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