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

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 1

[Image Analyst]

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;
	% Find out just the base filename without the folder.
	[thisFolder, baseFileNameNoExt, ext] = fileparts(thisFileName);
	% Create output image by resizing....
	fprintf('   Resizing %s...\n', baseFileNameNoExt);
	resizedImage = imresize(originalImage, [227, 227]);
	% Create the output filename which will be in the output folder.
	outputFileName = fullfile(outputFolder, [baseFileNameNoExt, ext]);
	% Write the image out to the output folder.
	fprintf('   Saving %s...\n', outputFileName);
	imwrite(resizedImage, outputFileName);
end
message = sprintf('Done processing %d images', length(ds.Files))
uiwait(helpdlg(message));

[Darren Brown]

WOW "Image Analyst"! I will try this out tomorrow. It is 3:07am here in Brisbane, Australia. I don't trust myself... I'd probably wake up in the morning wondering why the heck my toaster is wondering what a filename is.

Thank you in advance! I'll let you know how I go.

[Darren Brown]

Magic! Thank you Image analyst.

Now I just need to work out how to integrate it into the original code (I am new to coding).

Thank you again for your help! I am grateful how quickly you were able to respond and with a solution!

[Darren Brown]

Oh, I just needed to put a "1:" to get it to work.

Thank you again for your help. Sorry for my late update.

%original code:
for k =length(ds.Files)
end
%changed to:
for k =1:length(ds.Files)