I want to read the images from multiple sub-folders, kindly help
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Here is the code which reads images from one folder. but I want to read images from multiple sub-folders. I am new to MATLAB, kindly help me by editing my code
myDir = 'Training\0\';
dd = dir([myDir '*.jpg']);
%%Initilizing the variable for fast loading
trainSet = uint8(zeros(48*48,length(dd)));
for i=1:length(dd)
%%reading the images
img = imread([myDir dd(1).name]);
%%now storing it into one variable
trainSet(:,i) = img(:);
end
10 个评论
Rik
2018-1-17
You removed some code. If you try to merge code, you need to make sure to understand what the code is doing. Your pre-allocation is now inside a loop, which is never good idea.
% Define a starting folder.
start_path = 'C:\Users\saeeda\Desktop\Training';
% Ask user to confirm or change.
topLevelFolder = start_path;
if topLevelFolder == 0
return;
end
% Get list of all subfolders.
allSubFolders = genpath(topLevelFolder);
% Parse into a cell array.
remain = allSubFolders;
listOfFolderNames = {};
while true
[singleSubFolder, remain] = strtok(remain, ';');%#ok (suppres m-lint warning)
if isempty(singleSubFolder)
break;
end
listOfFolderNames = [listOfFolderNames singleSubFolder];%#ok (suppres m-lint warning)
end
numberOfFolders = length(listOfFolderNames);
totalFileList={};%this will contain all file names of jpg files
% Process all image files in those folders.
for k = 1 : numberOfFolders
% Get this folder and print it out.
thisFolder = listOfFolderNames{k};
%fprintf('Processing folder %s\n', thisFolder);
% Get JPG files.
filePattern = sprintf('%s/*.jpg', thisFolder);
baseFileNames = dir(filePattern);
numberOfImageFiles = length(baseFileNames);
% Now we have a list of all files in this folder.
if numberOfImageFiles >= 1
% Go through all those image files.
for f = 1 : numberOfImageFiles
fullFileName = fullfile(thisFolder, baseFileNames(f).name);
totalFileList{end+1}=fullFileName;%#ok (suppres m-lint warning)
%fprintf(' Processing image file %s\n', fullFileName);
end
else
%fprintf(' Folder %s has no image files in it.\n', thisFolder);
end
end
% Initilizing the variable for fast loading
trainSet = uint8(zeros(48*48,length(totalFileList)));
for i = 1 :length(totalFileList)
img = fullfile(totalFileList, totalFileList{i});
trainSet(:,i) = img(:);
end
回答(1 个)
Rik
2018-1-16
2 个评论
Rik
2018-1-16
编辑:Rik
2018-1-16
These are really minimal edits. You really should be able to do this yourself, especially with code that has this many comment explaining what it is doing.
% Define a starting folder.
start_path = 'Training\';
% Ask user to confirm or change.
topLevelFolder = start_path;
if topLevelFolder == 0
return;
end
% Get list of all subfolders.
allSubFolders = genpath(topLevelFolder);
% Parse into a cell array.
remain = allSubFolders;
listOfFolderNames = {};
while true
[singleSubFolder, remain] = strtok(remain, ';');%#ok (suppres m-lint warning)
if isempty(singleSubFolder)
break;
end
listOfFolderNames = [listOfFolderNames singleSubFolder];%#ok (suppres m-lint warning)
end
numberOfFolders = length(listOfFolderNames);
totalFileList={};%this will contain all file names of jpg files
% Process all image files in those folders.
for k = 1 : numberOfFolders
% Get this folder and print it out.
thisFolder = listOfFolderNames{k};
%fprintf('Processing folder %s\n', thisFolder);
% Get JPG files.
filePattern = sprintf('%s/*.jpg', thisFolder);
baseFileNames = dir(filePattern);
numberOfImageFiles = length(baseFileNames);
% Now we have a list of all files in this folder.
if numberOfImageFiles >= 1
% Go through all those image files.
for f = 1 : numberOfImageFiles
fullFileName = fullfile(thisFolder, baseFileNames(f).name);
totalFileList{end+1}=fullFileName;%#ok (suppres m-lint warning)
%fprintf(' Processing image file %s\n', fullFileName);
end
else
%fprintf(' Folder %s has no image files in it.\n', thisFolder);
end
end
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