How to select a folder at runtime?

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Jhilam Mukherjee 2015-9-2

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/239103-how-to-select-a-folder-at-runtime

评论： Image Analyst 2015-9-2

I have five folder. Each folder contains nearly 30 images. My programme is capable to read and execute all the images simultaneously from a specific folder by executing following code

srcFiles = dir('F:\Input_image\*.jpg');
for i = 1 : length(srcFiles)
      filename = strcat('F:\Input_image\',srcFiles(i).name);
      I{i} = imread(filename);
  end

Each time when I execute all the folder I have to change the path, manually. Is it possible to change the path by executing the programme.

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Answer 1

Image Analyst 2015-9-2

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/239103-how-to-select-a-folder-at-runtime#answer_191066

Try uigetdir().

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Jhilam Mukherjee 2015-9-2

Thanks. I can select the folder at runtime. I replace the filepath in dir() command but when for loop is executed it shows length(srcFiles) is zero. Is any additional command has to be added in programme.

Image Analyst 2015-9-2

在 MATLAB Online 中打开

Try this:

% Have user browse for a file, from a specified "starting folder."
% For convenience in browsing, set a starting folder from which to browse.
startingFolder = 'C:\Program Files\MATLAB';
if ~exist(startingFolder, 'dir')
  % If that folder doesn't exist, just start in the current folder.
  startingFolder = pwd;
end
% Get the name of the folder that the user wants to use.
folder = uigetdir(startingFolder, 'Select a folder');
if folder == 0
  % User clicked the Cancel button.
  return;
end
filePattern = fullfile(folder, '*.jpg')
jpegFiles = dir(filePattern);
for k = 1:length(jpegFiles)
  baseFileName = jpegFiles(k).name;
  fullFileName = fullfile(folder, baseFileName);
  fprintf(1, 'Now reading %s\n', fullFileName);
  % Read in image and display it.
  imageArray = imread(fullFileName);
  imshow(imageArray);  % Display image.
  drawnow; % Force display to update immediately.
end