How do I write images into folders specified in string array?

Question

Eric Martz 2019-9-3

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https://ww2.mathworks.cn/matlabcentral/answers/478766-how-do-i-write-images-into-folders-specified-in-string-array

评论： Image Analyst 2019-9-9

Hi,

I have a 3545 x 2 string array. I attached the first 10 rows as an example:

namesandlabels(1:10, :)
ans = 
  10×2 string array
    "Image100.241.jpg"    "Membrane-Stained Cells"
    "Image100.242.jpg"    "Membrane-Stained Cells"
    "Image100.251.jpg"    "Membrane-Stained Cells"
    "Image100.252.jpg"    "No Cells"              
    "Image100.261.jpg"    "Membrane-Stained Cells"
    "Image100.262.jpg"    "Membrane-Stained Cells"
    "Image100.271.jpg"    "No Cells"              
    "Image100.272.jpg"    "No Cells"              
    "Image100.281.jpg"    "No Cells"              
    "Image100.282.jpg"    "Intracellular-Stained Cells"           

As you can see, there are three different categories of the images. I want to write these images into one of three folders, according to which category they belong to. For example, I want to write the first image into a folder called "Membrane-Stained Cells" and so on for all 3545 images.

How do I do this?

Thanks in advance.

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Answer 1

Image Analyst 2019-9-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/478766-how-do-i-write-images-into-folders-specified-in-string-array#answer_390274

在 MATLAB Online 中打开

Try something like

for k = 1 : size(namesandlabels, 1)
    outputFolder = namesandlabels(k, 2);
    thisBaseFileName = namesandlabels(k, 1);
    sourceFullFileName = fullfile(pwd, thisBaseFileName); % Assume the image is in this folder.
    destinationFullFileName = fullfile(outputFolder, thisBaseFileName); % In some other folder.
    copyfile(sourceFullFileName, sourceFullFileName);
end

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Eric Martz 2019-9-8

Thanks for the answer and sorry for not responding earlier. This code doesn't work because it just says that it cannot copy a file onto itself.

Image Analyst 2019-9-9

Make sure your output folder is not the current folder. I bet that is what is happening. Make sure you have the right input folder and right output folder when you call fullfile().

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