How to store images and its labels in a struct array?

I am doing Image classification task. I have total 500 folders and under each folder i have three image files as nifti file format. My first target here is store all the images in a single cell array (1*1500) in a simplest way. Next is to create a structure array together this original image files and the labels. Any help is appreciated!

Thanks

[Image Analyst]

I REALLY doubt you need to do that even though you think you do. I never do. Why do you think you need to do that, rather than just read and process one image at a time?

By the way, a structure array is different than a cell array. See the FAQ: http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F

[OCDER]

How about starting directly from a structure? Saves you from using a cell2struct command.

S(1:1500) = struct('Image', [], 'Label', '')
for j = 1:length(S)
  S(j).Image = %Read the jth image
  S(j).Label = 'some kind of label';
end

[OCDER]

Maybe Jes is trying to do a lot of image-to-image comparisons for classification purposes? Hope you have enough memory!