how to use save a new file with a prefix before the original file name in a loop

Question

Andrea C 2018-9-24

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https://ww2.mathworks.cn/matlabcentral/answers/420544-how-to-use-save-a-new-file-with-a-prefix-before-the-original-file-name-in-a-loop

评论： Andrea C 2018-9-25

Hi,

I would like to save each file in a loop using a prefix (in this case, "blur_") before the name of the original file. This is the code I have so far

   for i = 1:N
    blur{i} = imgaussfilt(imdata{i},10)
    imshow(blur{1})
    imwrite(blur{i},sprintf('blurred_circle_%d.png',i))
end

using this code I am able to define a prefix (blurred_circle_) and then to give a number to each file and save them. the point is that I need my output to be like 'blurred_(original filename).png'. How can I do that?

thanks A

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Answer 1

Image Analyst 2018-9-25

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https://ww2.mathworks.cn/matlabcentral/answers/420544-how-to-use-save-a-new-file-with-a-prefix-before-the-original-file-name-in-a-loop#answer_338243

编辑：Image Analyst 2018-9-25

在 MATLAB Online 中打开

Try this:

files = dir('*.png');
for k = 1 : length(files)
  thisName = files(k).name
  fullFileName = fullfile(files(k).folder, files(k).name)
  theImage = imread(fullFileName);
  subplot(1, 2, 1);
  imshow(theImage);
  drawnow;
  blurredImage = imgaussfilt(theImage, 10);
  subplot(1, 2, 2);
  imshow(blurredImage);
  drawnow;
  outputBaseFileName = sprintf('Blur_%s', thisName);
  outputFullFileName = fullfile(files(k).folder, outputBaseFileName)
  imwrite(blurredImage, outputFullFileName);
end