How to read the images serially from imageDataStore

In the example of Train Deep Learning Network to Classify New Images mentioned in MATLAB Help Documentation, they have mentioned the following

idx = randperm(numel(imdsValidation.Files),4); 

to read the any/random four images. How can I read all files serially, present in "imdsValidation.Files".

Answer 1

[TARUN]

Hi @Ambadas Shinde,

I understand you are interested in reading all the images sequentially from an imageDatastore.

You can achieve this by using a for loop, as demonstrated in the example below:

filePaths = imdsValidation.Files; 
numFiles = numel(filePaths); 
for i = 1:numel(imdsValidation.Files) 
    % Get the path of the i-th image 
    imgPath = imdsValidation.Files{i};  
    img = imread(imgPath);  
    imshow(img); % display the image 
    title(['Image ' num2str(i)]); 

This script will iterate over each file in imdsValidation.Files, read the image using imread, and display it using imshow.

You can refer to the following MathWorks documentation for more information:

imread: https://www.mathworks.com/help/matlab/ref/imread.html

imshow: https://www.mathworks.com/help/matlab/ref/imshow.html