How to save image in directory in MATLAB

Question

Stephen john 2022-3-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1674549-how-to-save-image-in-directory-in-matlab

评论： Bjorn Gustavsson 2022-3-18

在 MATLAB Online 中打开

Hello everyone , i hope you are doing well.

i have the following code in which i create six directory and save images to corresponding directory,

I want to create a directory in which all these directory are subdirectory and save images to corresponding directory

Can anybody help me

for example a directory created name 'Dataset' and all directory ('C1','C2','C3','C4','C5','C6') are in this one directory and save images to corresponding directory

[labelNums,~,labelIdx] = unique(labels,'rows');
labelStrs = {'C1','C2','C3','C4','C5','C6'};
%% make the folders
for ii = 1:numel(labelStrs)
    labelStr = labelStrs{ii};
    if ~isfolder(labelStr)
        mkdir(labelStr);
    end
end
[numImages, lenImage] = size(Dataset);
imSz = 1000; % assuming images are 1000x1000
imbg = false(imSz);                                  
imfg = ~imbg(1,1);                                 
imSizeOut=[1000 1000];                                
for imNum = 1:numImages        
    imData = round(Dataset1000(imNum,:));  
    [~,Y] = meshgrid(1:imSz); 
    
    % black and white image
    BW = imbg;
    BW(Y==imData)=imfg;
    
    % resize (from 1000x1000)
    BW=imbinarize(imresize(double(BW),imSizeOut));
    % convert to uint8 (0 255)
    im = im2uint8(BW);
    im = flipud(im);
    folderName = labelStrs{labelIdx(imNum)};
    im_FullFilename = fullfile(folderName,sprintf('im_%06g.png',imNum));
    imwrite(im,im_FullFilename);
end

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Answer 1

Bjorn Gustavsson 2022-3-18

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1674549-how-to-save-image-in-directory-in-matlab#answer_920844

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For this type of folder-related work I typically define a basedir that make it possible to run the script from any directory:

basedir = fullfile('mnt','data','DataSet')
% On Linux/Unix-type filesystems this will make basedir
% '/mnt/data/DataSet'

Then you can generate the full path to the directory by changing either to

    folderName = fullfile(basedir,labelStrs{labelIdx(imNum)});
    im_FullFilename = fullfile(folderName,sprintf('im_%06g.png',imNum));

or

im_FullFilename = fullfile(basedir,folderName,sprintf('im_%06g.png',imNum));

HTH

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Stephen john 2022-3-18

@Bjorn Gustavsson not working

Bjorn Gustavsson 2022-3-18

在 MATLAB Online 中打开

OK, then you will have to make a similar enough modification of your first loop, from:

for ii = 1:numel(labelStrs)
  labelStr = labelStrs{ii};
  if ~isfolder(labelStr)
    mkdir(labelStr);
  end
end

to something like:

if ~isfolder(basedir)
  mkdir(basedir)
end
for ii = 1:numel(labelStrs)
  dirname = fullfile(basedir,labelStrs{ii});
  if ~isfolder(dirname)
    mkdir(dirname);
  end
end

To get more relevant help it will help if you include error-messages and other relevant informatinon in addition to the "it doesn't work" that doesn't tell us anything relevant for bug-hunting.

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