how can i read multiple images one by one from a particular folder?

Question

apurva mane 2015-2-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/179800-how-can-i-read-multiple-images-one-by-one-from-a-particular-folder

编辑： Stalin Samuel 2015-2-23

we are doing project on sorting of black colored raisins by using image processing. For that we need reading of multiple images from folder and compare them with given database.

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Stephen23 2015-2-23

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

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Answer 1

Stalin Samuel 2015-2-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/179800-how-can-i-read-multiple-images-one-by-one-from-a-particular-folder#answer_168930

编辑：Stalin Samuel 2015-2-23

在 MATLAB Online 中打开

dirName = '---your directory-----'
dirData = dir(dirName);      %Get the data for the current directory
dirIndex = [dirData.isdir];  %Find the index for directories
fileList = {dirData(~dirIndex).name}';  % Get a list of the files
if ~isempty(fileList)
    fileList = cellfun(@(x) fullfile(dirName,x),...  % Prepend path to files
           fileList,'UniformOutput',false);
end
subDirs = {dirData(dirIndex).name};  % Get a list of the subdirectories
validIndex = ~ismember(subDirs,{'.','..'});  % Find index of subdirectories
x = 0                                      %  that are not '.' or '..'
for iDir = find(validIndex)  
% Loop over valid subdirectories
    x=x+1
    nextDir = fullfile(dirName,subDirs{iDir});    % Get the subdirectory path
    fileList = [fileList; getAllFiles(nextDir)];  % Recursively call getAllFiles
end
nfil=size(fileList)
for m = 1:nfil
  Currrent_Image= imread(sprintf('%s',fileList{m,1}));
end

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Stephen23 2015-2-23

编辑：Stephen23 2015-2-23

This is a good answer, but it is unreadable. Consider:

Put comments before each line, not at the end of the line.
Don't use # to indicate a comment.
Keep code lines together as much as possible
Be consistent with indenting.

It could be significantly improved by removing the reference to multiple sub-directories and the function getAllFiles, which is not a standard MATLAB function, and this reference is unlikely to help a new user to read their files. In fact the whole for loop should be removed.

If this was readable and the for loop removed, then I would consider voting for it, as it does contain good practices such as using fullfile.

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