Ho do I change my dataset of images to the same size?

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Abdulaziz Alotaibi 2021-2-18

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https://ww2.mathworks.cn/matlabcentral/answers/748892-ho-do-i-change-my-dataset-of-images-to-the-same-size

编辑： KALYAN ACHARJYA 2021-2-18

采纳的回答： KALYAN ACHARJYA

在 MATLAB Online 中打开

Hello everyone,

I'm building a CNN model, but first I would like to control the images saiz

since all the dataset images aize are 40*24*1 , and I would like to change it to like 100*60*1

How do I do that ?

this is my code:

clear;
clc;
outputFolder = fullfile("binary_dataset");
rootFolder = fullfile(outputFolder, "Categories");
categories = {'Anomaly','No-Anomaly'}; % names of the folders
imds = imageDatastore(fullfile(rootFolder,categories),'LabelSource','foldernames');
tbl = countEachLabel(imds);
[imdsTrain,imdsValidation] = splitEachLabel(imds, 0.8, 'randomize');
inputSize = [40 24 1];
numClasses = 2;
layers = [
    imageInputLayer(inputSize)
    convolution2dLayer(5,20,'Padding',1)
    batchNormalizationLayer
    reluLayer
    maxPooling2dLayer(2,'Stride',2)
    convolution2dLayer(5,20,'Padding',1)
    batchNormalizationLayer
    reluLayer
    maxPooling2dLayer(2,'Stride',2)
    convolution2dLayer(5,20,'Padding',1)
    batchNormalizationLayer
    reluLayer
    maxPooling2dLayer(2,'Stride',2)
    fullyConnectedLayer(numClasses)
    softmaxLayer
    classificationLayer];
options = trainingOptions('adam', ...
    'MaxEpochs',1, ...
    'ValidationData',imdsValidation, ...
    'ValidationFrequency',30, ...
    'Verbose',false, ...
    'Plots','training-progress');
net = trainNetwork(imdsTrain,layers,options);
YPred = classify(net,imdsValidation);
YValidation = imdsValidation.Labels;
accuracy = mean(YPred == YValidation)

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Answer 1

KALYAN ACHARJYA 2021-2-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/748892-ho-do-i-change-my-dataset-of-images-to-the-same-size#answer_626517

编辑：KALYAN ACHARJYA 2021-2-18

Steps:

Call the images one by one
Do resize
Save in the different folder

https://in.mathworks.com/matlabcentral/answers/393578-how-to-read-input-images-from-the-folder-sequentially

Later use those folder images (resize images) in CNN

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Abdulaziz Alotaibi 2021-2-18

编辑：Abdulaziz Alotaibi 2021-2-18

在 MATLAB Online 中打开

I Used the following Code and worked for me!

Thank you.

srcFiles = dir('E:\img\*.jpg');  % the folder in which ur images exists
for i = 1 : length(srcFiles)
filename = strcat('E:\img\',srcFiles(i).name);
im = imread(filename);
k=imresize(im,[300,300]);
newfilename=strcat('E:\img\',srcFiles(i).name);
imwrite(k,newfilename,'jpg');
end