Split image by the label and drop to the subfolder

Hi. I'm working on a project and I need to split my dataset (images) by the labels in an Excel file and drop them to subfolders( eg. normal, diabetes, cataract,...). How can I split them by the labels?

I attach a screenshot to explain what I need.

Also I wrote following script for that, but faced an error which is: "Brace indexing is not supported for variables of this type."

My script:

datapath='C:\Users\FarHad\Downloads\Compressed\ODIRK\preprocessed_images';

% Two-class Data path
multi_class_datapath='C:\Users\FarHad\Downloads\Compressed\ODIRK\preprocessed_images\right';
% Class Names
class_names={'Normal','Diabetes','Glaucoma','Cataract','AMD','Hypertension','Myopia','OtherDiseases'};
mkdir(sprintf('%s%s',multi_class_datapath,class_names{1}))
mkdir(sprintf('%s%s',multi_class_datapath,class_names{2}))
mkdir(sprintf('%s%s',multi_class_datapath,class_names{3}))
mkdir(sprintf('%s%s',multi_class_datapath,class_names{4}))
mkdir(sprintf('%s%s',multi_class_datapath,class_names{5}))
mkdir(sprintf('%s%s',multi_class_datapath,class_names{6}))
mkdir(sprintf('%s%s',multi_class_datapath,class_names{7}))
mkdir(sprintf('%s%s',multi_class_datapath,class_names{8}))
% Read the Excel Sheet with Labels
[num_data]=xlsread('full_df.xlsx');
% Determine the Labels
train_labels=num_data(:,end);
% Filename
filename=num_data(1:end,2);
% Determine the Files put them in separate folder
for idx=1:length(filename)
    % You could uncomment if you would like to see live progress
    %  fprintf('Processing %d among %d files:%s \n',idx,length(filename),filename{idx})[/%]
    % Read the image
    current_filename=strrep(filename{idx}, char(39), '');
    img=imread(sprintf('%s%s.jpg',datapath,current_filename));
    % Write the image in the respective folder
    imwrite(img,sprintf('%s%s%s%s.jpg',multi_class_datapath,class_names{train_labels(idx)},'\',current_filename));
    clear img;
end

Answer 1

[yanqi liu]

clc; clear all; close all;
datapath='C:\Users\FarHad\Downloads\Compressed\ODIRK\preprocessed_images';
% Two-class Data path
multi_class_datapath='C:\Users\FarHad\Downloads\Compressed\ODIRK\preprocessed_images\right\';
% Class Names
class_names={'Normal','Diabetes','Glaucoma','Cataract','AMD','Hypertension','Myopia','OtherDiseases'};
for i = 1 : length(class_names)
    fdi = fullfile(multi_class_datapath, class_names{i});
    if ~exist(fdi, 'dir')
        mkdir(fdi);
    end
end
% Read the Excel Sheet with Labels
[num_data]=xlsread('full_df.xlsx');
% Determine the Labels
train_labels=num_data(:,end);
% Filename
filename=num_data(1:end,2);
% Determine the Files put them in separate folder
for idx=1:length(filename)
    % You could uncomment if you would like to see live progress
    %  fprintf('Processing %d among %d files:%s \n',idx,length(filename),filename{idx})[/%]
    % Read the image
    current_filename=strrep(filename{idx}, char(39), '');
    fi = fullfile(datapath, [current_filename '.jpg']);
    if ~exist(fi, 'fi')
        disp(fi);
        error('can not find the file');        
    end
    img=imread(fi);
    % Write the image in the respective folder
    fi2 = fullfile(multi_class_datapath, class_names{train_labels(idx)}, [current_filename '.jpg']);
    imwrite(img,fi2);
    clear img;
end

[Farhad Abedinzadeh]

Thanks for your response, but the error persists.(line 24)

"Brace indexing is not supported for variables of this type"

[yanqi liu]

clc; clear all; close all;
datapath='C:\Users\FarHad\Downloads\Compressed\ODIRK\preprocessed_images';
% Two-class Data path
multi_class_datapath='C:\Users\FarHad\Downloads\Compressed\ODIRK\preprocessed_images\right\';
% Class Names
class_names={'Normal','Diabetes','Glaucoma','Cataract','AMD','Hypertension','Myopia','OtherDiseases'};
for i = 1 : length(class_names)
    fdi = fullfile(multi_class_datapath, class_names{i});
    if ~exist(fdi, 'dir')
        mkdir(fdi);
    end
end
% Read the Excel Sheet with Labels
[num_data]=xlsread('full_df.xlsx');
% Determine the Labels
train_labels=num_data(:,3);
% Filename
filename=num_data(1:end,2);
% Determine the Files put them in separate folder
for idx=1:length(filename)
    % You could uncomment if you would like to see live progress
    %  fprintf('Processing %d among %d files:%s \n',idx,length(filename),filename{idx})[/%]
    % Read the image
    current_filename=strrep(filename{idx}, char(39), '');
    fi = fullfile(datapath, [current_filename '.jpg']);
    if ~exist(fi, 'fi')
        disp(fi);
        error('can not find the file');        
    end
    img=imread(fi);
    % Write the image in the respective folder
    fi2 = fullfile(multi_class_datapath, class_names{round(double(train_labels(idx)))}, [current_filename '.jpg']);
    imwrite(img,fi2);
    clear img;
end

[Farhad Abedinzadeh]

sorry,but it still have a same error on line 24 :

line24: current_filename=strrep(filename{idx}, char(39), '');

would you please give me another way for solving this problem?

[yanqi liu]

clc; clear all; close all;
datapath='C:\Users\FarHad\Downloads\Compressed\ODIRK\preprocessed_images';
% Two-class Data path
multi_class_datapath='C:\Users\FarHad\Downloads\Compressed\ODIRK\preprocessed_images\right\';
% Class Names
class_names={'Normal','Diabetes','Glaucoma','Cataract','AMD','Hypertension','Myopia','OtherDiseases'};
for i = 1 : length(class_names)
    fdi = fullfile(multi_class_datapath, class_names{i});
    if ~exist(fdi, 'dir')
        mkdir(fdi);
    end
end
% Read the Excel Sheet with Labels
[num_data]=xlsread('full_df.xlsx');
% Determine the Labels
train_labels=num_data(:,3);
% Filename
filename=num_data(1:end,2);
% Determine the Files put them in separate folder
for idx=1:length(filename)
    % You could uncomment if you would like to see live progress
    %  fprintf('Processing %d among %d files:%s \n',idx,length(filename),filename{idx})[/%]
    % Read the image
    current_filename=strrep(filename{idx}, '''', '');
    fi = fullfile(datapath, [current_filename '.jpg']);
    if ~exist(fi, 'fi')
        disp(fi);
        error('can not find the file');        
    end
    img=imread(fi);
    % Write the image in the respective folder
    fi2 = fullfile(multi_class_datapath, class_names{round(double(train_labels(idx)))}, [current_filename '.jpg']);
    imwrite(img,fi2);
    clear img;
end

[yanqi liu]

current_filename=strrep(filename{idx}, char(39), '');

it used to replace '''

so，may be use

current_filename=strrep(filename{idx}, '''', '');

current_filename=strrep(filename{idx}, '\'', '');

[yanqi liu]

now filename is number vector, so just use

current_filename=strrep(num2str(filename(idx)), '''', '');