How to take image from multi folders?
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Hi everybody
I have a few thousand folders, each folder contains 2 images with information in their name, i want to take randomly 1 image from each folder and put all the taken images into one new folder in desktop for further calculation, please help, thank you very much.
4 Commenti
Rik
il 21 Giu 2020
You mean you want to read an image? If you know the file names you can just use imread.
Risposta accettata
Monalisa Pal
il 21 Giu 2020
Modificato: Monalisa Pal
il 22 Giu 2020
Hi,
'fetching a random image' part of the following code may help you
clearvars -global
clearvars
close all
clc
% creating destination folder
destination = 'destinationfolder';
mkdir(destination);
n_folders = 10; % say there are 10 folders
for i = 1:n_folders
% fetching the contents of the folders
foldername = ['folder_', num2str(i), '/'];
path = [foldername, '*.png']; % or other imgfile extensions
contents = dir(path);
% fetching a random image
if numel(contents) < 2
error([foldername, ' has only ', num2str(numel(contents)), ' image files']);
end
img_index = randi([1, numel(contents)], 1);
disp(['From ', foldername, ' copying ', contents(img_index).name]);
source = [foldername, contents(img_index).name];
copyfile(source, destination);
end
20 Commenti
Monalisa Pal
il 22 Giu 2020
Mr. Frank, I misunderstood the directory structure earlier. Lets see if this works.
clearvars -global
clearvars
close all
clc
% creating destination folder
destination = 'Images_place';
mkdir(destination);
folder = 'Bigfolder';
sub_folders = dir(folder);
%n_folders = 2950; % say there are 2950 folders
% n_folders = numel(sub_folders) - 2;
exts = {'*.jpg', '*.gif', '*.png', '*.jpeg', '*.bmp'};
for i = 3:numel(sub_folders)
% fetching the contents of the folders
foldername = ['Bigfolder/', sub_folders(i).name, '/'];
contents_parts = cellfun(@(E) dir( fullfile(foldername, E) ), exts, 'uniform', 0);
contents = vertcat(contents_parts{:});
% fetching a random image
if isempty(contents)
fprintf(1, 'caution: folder "%s" had no useable images\n', foldername);
continue;
end
img_index = randi([1, numel(contents)], 1);
disp(['From ', foldername, ' copying ', contents(img_index).name]);
filename = fullfile(foldername, contents(img_index).name);
copyfile(filename, destination);
end
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