Loading specific Images from a folder

I have a folder of images, I would like to extract it as it appears in an array of my choosing.

E.G I have an array: [1 2 3];

This would extract the name of the first 3 images in this order.

E.G [1 2 3 5];

This would extract the name of the first 3 images and the 5th image also in this order.

I would like these Imagenames to be presented in a folder.

Is there a way to do this?

Answer 1

[KALYAN ACHARJYA]

path_directory='ddb1_fundusimages'; % 'Folder name'
original_files=dir([path_directory '/*.png']); 
array1=[5 10 15];
j=1;
for k=1:length(array1)
   filename=[path_directory '/' original_files(array1(j)).name];
   j=j+1;
   image1=imread(filename);
   figure, imshow(image1); 
   % Do the Image Operation as per your work
end

Before doing the above operations , please ensure the all images are sorted in namewise.

(For reference see the attach image)

[Jack Zimmerman]

When placing the images in my folder through matlab, a few URL's threw errors, as a result they were skipped. Therefore, the folder does not have a perfect sequence.

Could your code be based on the exact order it was read from the folder. As in the array [1 2] represents the first and second image read from the folder. Which may be the Image001 and Image003.

How I preserve the order in my folder?

[KALYAN ACHARJYA]

Save the images in namewise im1, im2, im3..etc, code take images based on array order sequence.

The code os perfectly working in my case.

[Jack Zimmerman]

Doesnt work for my intended use yet.

Is there a way then to take those images and save them as 1,2,3 ect... while preserving the order they are in now?

Or must it be a manual process?

[KALYAN ACHARJYA]

Are the images name are random in your case?

Yes you can do that, check here

[Jack Zimmerman]

They have a theme:

Pos1 - People.jpg

Pos3 - People.jpg

Some entries are just missing.

[KALYAN ACHARJYA]

Can you share the some 10 (sequence from starting) images, so that I can try on it?

use google drive

Please confirm-you want to call the images from folder as per array indexing values (not random)?

[Jack Zimmerman]

Ive used certain images from that folder, perhaps the 1st,3rd and 5th. I want to call the names of these images and save them in a cell perhaps.

E.G Ive used the 1st,3rd and 5th Images

Their names are:

Image001.jpg, Image004.jpg and Image007.jpg respectively, I would like to save the names of these images in a cell on matlab presented like this perhaps:

'Image001.jpg' (1st Image)

'Image004.jpg' (3rd Image)

'Image007.jpg' (5th Image)

However I would like to do so, by referrencing their order within the folder so i dont have to manually check for their names, hence, the array ([1 3 5]).

[KALYAN ACHARJYA]

Do the first part, then think on sencond task (save in a cell). It is OK in my case. Whi I have run the above code, from my database it call the 5th image, 10th image and 15th image.

If the images number are less do the renaming and apply the code.

[Jack Zimmerman]

When the files are saved in "origional_files" using dir, their ordering becomes changed.

From:

Pos1 - People.jpg, Pos2 - People.jpg, Pos3 - People.jpg

To:

Pos1 - People.jpg, Pos100 - People.jpg, Pos1000 - People.jpg

Thus the images are not provided in order and the iterating doesnt work.

[Jack Zimmerman]

Ive managed to find the resources to do this, here is the code:

path_directory='People'; % 'Folder name'
original_files=dir([path_directory '\*.jpg']); 
Ordered = {original_files.name};
Ordered=natsortfiles(Ordered);
ImagesRequired = {};
for i = k'
    ImagesRequired{i} = Ordered{i};
end
ImagesRequired = ImagesRequired';
ImagesRequired(cellfun('isempty', ImagesRequired)) = [];

The function natsortfiles(), is user generated from this link:

Natural-Order Filename Sort

This provides the exact format I was looking for.