How to create a 3D stack using 2D images

Hi,

I have a 2D binary image with dimensions [145,145] and I would like to create a 3D stack using 10 times the same 2D binary image, i.e. a series of the same 2D images.

I tried the following code but I am ending up with a 2D image instead of 3D.

mask = load_nii('~/mask_2d.nii');
mask_2d = double(mask.img);
mask_3d = zeros(145,145,10);
for i = 1:10
    mask_3d(:,:,i) = mask_3d(:,:,i)+mask_2d(:,:);
end

Any help would be much appreciated.

Answer 1

[Matt J]

Are you sure you need to do that? It seems like a waste of memory to copy the same image 10 times. If you're sure it's what you want, however,

mask_3d=repmat(mask_2d,1,1,10);