Read and Display Selected Image from a Folder Based on Dimension

I have a folder that contains 16 images. From these images, 9 of them have a dimension of 1280x1024, and the rest of them have different dimensions. How can I read and display these 9 images only?

folder = 'C:\Users\Documents\PhD\Analysis\Hot-Spot\'; 
jpeg_files = dir(fullfile(folder,'*.jpg'));
nfiles2 = length(jpeg_files);
for k = 1:nfiles2
    currentimage{k} = imread(fullfile(folder,jpeg_files(k).name));
    figure; imshow(currentimage{k});   % creates a new window for each image
     
end

Answer 1

[Ameer Hamza]

Try this

folder = 'C:\Users\Documents\PhD\Analysis\Hot-Spot\'; 
jpeg_files = dir(fullfile(folder,'*.jpg'));

img_info = cellfun(@(x) {imfinfo(x)}, fullfile({jpeg_files.folder}, {jpeg_files.name}));
img_dim = cellfun(@(x) {[x.Width x.Height]}, img_info)';
img_dim = cell2mat(img_dim);
idx = all(img_dim == [1280 1024], 2);
jpeg_files(~idx) = [];

nfiles2 = length(jpeg_files);
for k = 1:nfiles2
    currentimage{k} = imread(fullfile(folder,jpeg_files(k).name));
    figure; imshow(currentimage{k});   % creates a new window for each image
     
end

[Fahmi Akmal Dzulkifli]

The error appeared like this:

Error using imfinfo (line 100)

Unable to open file "image_0001.jpg" for reading.

Error in HotSpot>@(x){imfinfo(x)}

Error in HotSpot (line 45)

img_info = cellfun(@(x) {imfinfo(x)}, {jpeg_files.name});

[Ameer Hamza]

I made an oversight in my initial code. Please check the updated code.

[Fahmi Akmal Dzulkifli]

Done, thank you very much for your kind assistance

[Ameer Hamza]

Glad to be of help.

[Fahmi Akmal Dzulkifli]

I would be more grateful if you can tell me the process each of the line, so in the future, I know how and where to use it:

img_info = cellfun(@(x) {imfinfo(x)}, fullfile({jpeg_files.folder}, {jpeg_files.name}));
img_dim = cellfun(@(x) {[x.Width x.Height]}, img_info)';
img_dim = cell2mat(img_dim);
idx = all(img_dim == [1280 1024], 2);
jpeg_files(~idx) = [];

[Ameer Hamza]

img_info = cellfun(@(x) {imfinfo(x)}, fullfile({jpeg_files.folder}, {jpeg_files.name}));

This line goes through all files all apply imfinfo() function, which reads image metadata, e.g., encoding, width, height, etc. and return it as struct

img_dim = cellfun(@(x) {[x.Width x.Height]}, img_info)';
img_dim = cell2mat(img_dim);

Go through the structs returned in the previous step and extract the width and height of each image and, at the end, convert it to matrix format.

idx = all(img_dim == [1280 1024], 2);
jpeg_files(~idx) = [];

get the index of all images with required width and height and delete those which does match the required resolution.

[Fahmi Akmal Dzulkifli]

Ok, noted. Again, thank you very much Sir

[Fahmi Akmal Dzulkifli]

Sorry Sir for disturbing, I just want to ask, can I delete the unwanted images from the folder automatically after selecting the nine images?

[Ameer Hamza]

Can you start a new question and describe the problem in more detail. Paste the link here so that I will get a notification.