How to extract specific images from a library of images?

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oshawcole 2019-8-20

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https://ww2.mathworks.cn/matlabcentral/answers/476909-how-to-extract-specific-images-from-a-library-of-images

编辑： Stephan 2019-8-20

I have a folder which has 600 images, the images are named as 10000, 10001, 10002,... I have an excel file which has the information about the image number of interest. For example, I want image number 0,3,8,12,16,224 etc to be extracted from this library. How do I go about executing that? Any help would be appreciated.

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Stephan 2019-8-20

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https://ww2.mathworks.cn/matlabcentral/answers/476909-how-to-extract-specific-images-from-a-library-of-images#answer_388374

编辑：Stephan 2019-8-20

在 MATLAB Online 中打开

You can construct a string array of the desired file names like follows:

exceldata = [0,3,8,12,16,224];
filenames = string(10000 + exceldata)';
fileending = repelem(".jpg", numel(filenames), 1);
files = join([filenames fileending],"");
folder = repelem("C:\MyData\YourFolderName\", numel(filenames), 1);
fullFileNames = join([folder files],"")

in this exampe the result is:

fullFileNames = 
  6×1 string array
    "C:\MyData\YourFolderName\10000.jpg"
    "C:\MyData\YourFolderName\10003.jpg"
    "C:\MyData\YourFolderName\10008.jpg"
    "C:\MyData\YourFolderName\10012.jpg"
    "C:\MyData\YourFolderName\10016.jpg"
    "C:\MyData\YourFolderName\10224.jpg"