How to retrieve images with the same name from multiple folders?

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Sivaramakrishnan Rajaraman 2018-7-11

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https://ww2.mathworks.cn/matlabcentral/answers/409916-how-to-retrieve-images-with-the-same-name-from-multiple-folders

评论： Sivaramakrishnan Rajaraman 2018-7-13

I have nine different folders, each containing hundreds of images. I suspect there are a few images with the same names that are present in two or more folders. How do I retrieve only those images that are present in these nine different folders?

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Answer 1

Walter Roberson 2018-7-12

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https://ww2.mathworks.cn/matlabcentral/answers/409916-how-to-retrieve-images-with-the-same-name-from-multiple-folders#answer_328500

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Untested.

projectdir = '/Users/siv/PhD/part11';
dinfo = dir(projectdir);
dinfo(~[dinfo.isfolder]) = [];   %remove non-folders
dinfo( ismember({dinfo.name}, {'.', '..'}) ) = [];   %delete . and ..
subdirnames = {dinfo.name};
fqsubdirnames = fullfile(projectdir, subdirnames);
numsubs = length(subdirnames);
subinfo = cell(numsubs, 1);
for K = 1 : numsubs
  thisinfo = dir(fqsubdirnames{K});
  thisinfo( [thisinfo.isdir] ) = [];  %remove folders. This includes . and ..
  subinfo{K} = {thisinfo.name};
end
allnames = horzcat(subinfo{:});
numents = cellfun(@length, subinfo);
group_breakpoints = cumsum([1; numents(:)]) .' ;
[unames, ~, uidx] = unique(allnames);
counts = accumarray(uidx, 1);
dupidx = find(counts > 1);
if isempty(dupidx)
   fprintf('No duplicate names!\n');
else
  fprintf('Some duplicates found!\n\n');
    for K = 1 : length(dupidx)
      orig_idx = find(uidx == dupidx(K));
      [~, folderidx] = histc(orig_idx, group_breakpoints);
     fprintf('file "%s" found in the following folders:\n', unames{dupidx(K)} );
      fprintf('  %s\n', subdirnames{folderidx} );
    end
    fprintf('\n');
  end

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Image Analyst 2018-7-13

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Images can have the same name and not be duplicates so you might want to check the dates, CRC, etc. Just construct the output folder name, full file name, and then call imwrite():

Something like

outputFolder = '/Users/siv/PhD/part11/Duplicate Images'  % Wherever you want.
baseFileName = sprintf('duplicate_%s', originalBaseFileName);
fullFileName = fullfile(outputFolder, baseFileName);
imwrite(theImage, fullFileName);

Obviously make needed variable name changes as appropriate.

Sivaramakrishnan Rajaraman 2018-7-13

I'm running your main code that prints the "unames{dupidx(K)}" and the sub directory names "subdirnames{folderidx}". In that context, if I'm to use to above code into the last for loop of your code, what should be the originalBaseFileName?

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