How to save resized image with original filename to a folder.

2 min readMay 12, 2021

Hi there,

I am trying to save a resized (smaller) image to a folder. I am doing image classification and having the resized images would be helpful.

I would like to store the resized images into a folder called “resized” or something like that.

Any thoughts? Thank you for any help you can offer.

Code below. Comments are from some of my trying to work it out myself.

clc
clear all
close all 
load('Train_AlexNet_Feature')
load('Train_AlexNet_Label')
Test_AlexNet_Feature=[];
BT50=[];
mkdir('New Folder')
ds = imageDatastore('/Users/kimpitman/Documents/MATLAB/Vehicle/Test');
a=ds.Files;
for i=1:length(a)
[I,info] = readimage( ds , i);
        g=imresize(I,[227,227]);
        imshow(g)
        net=alexnet;
        net.Layers;
        layer='fc7';
        F=activations(net,g,layer,'outputAs','rows');
        Test_AlexNet_Feature=[Test_AlexNet_Feature;F];
SVMModel=fitcsvm(Train_AlexNet_Feature,Train_AlexNet_Label,'KernelFunction','Linear');
[label,score]=predict(SVMModel,Test_AlexNet_Feature);
label=label;
if label(i,:)=='1'
    display('This is BT-50')
    BT=info.Filename
    BT=string(BT);
    BT50=[BT50;BT];
imwrite(g,fName(i),'.png');
    %srcFiles = dir('/Users/kimpitman/Documents/MATLAB/Vehicle/Test');  % the folder in which ur images exists
%for i = 1 : length(srcFiles)
    %filename = strcat('/Users/kimpitman/Documents/MATLAB/Vehicle/Testcopiedimages',srcFiles(i).name);
    %im = imread(filename);
    %newfilename=strcat('/Users/kimpitman/Documents/MATLAB/Vehicle/Testcopiedimages',srcFiles(i).name);
    %imwrite(k,newfilename,'jpg');
    %end
%end
    %newfilename=ds.Files('/Users/kimpitman/Documents/MATLAB/Vehicle/Testcopiedimages',srcFiles(i).name);
    %imwrite(g,newfilename,'jpg');
    %imwrite(g,ds);
else
    display('This is not BT-50')
    BT=info.Filename
    BT=string(BT);
    BT50=[BT50;BT];
end
end
save('BT50')
T=table(BT50,label);
fname=sprintf('LinearTestMix159%s.xlsx',datestr(now, 'yyyymmddHHMM'));
writetable(T,fname,'Sheet',1)

ANSWER

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Try This:

% Define input folder location.
folder = '/Users/kimpitman/Documents/MATLAB/Vehicle/Test';
% Create output folder name.
outputFolder = fullfile(folder, '/resized');
% Make output folder if it exists.
if ~isfolder(outputFolder)
	mkdir(outputFolder)
end
ds = imageDatastore(folder)
% Loop over all files.
for k =length(ds.Files)
	% Get this filename.
	thisFileName = ds.Files{k};
	fprintf('Processing %s...\n', thisFileName);
	% Read in the input image.
	originalImage = imread(thisFileName);
	% Display it.
	imshow(originalImage);
	drawnow;

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