Concatenation of images in one Matrix

Hi all

I have 3 images having different size of 512x512,256x256,128x128

How can I concatenate them together in one matrix?

[José-Luis]

Do you want to rescale or pad your results? Are you interested in a cell array?

[Algorithms Analyst]

I made a Gaussian pyramid of 3 layers.let say its 512*512,256*256,128*128. Now I have a cell array of this pyramid.now I want this pyramid in one matrix for further processing.

[José-Luis]

You can't have them in a single matrix if you don't resize or pad your matrices, or if you don't store everything as a single row/column vector, but I'm guessing the later is not what you want.

Answer 1

[Image Analyst]

I'd put them into a structure. You can attach each image variable to the structure as a new field.

my3images.smallImage = smallImage128;
my3images.mediumImage = mediumImage256;
my3images.bigImage = bigImage512;

This lets you save all 3 images in a single variable with no change in their size . You could have an array of these structures if you had multiple sets of images.

You could also use a 1 by 3 cell array if you want but I think cell arrays are more complicated because there's often confusion over whether to use parentheses of braces.

Answer 2

[Azzi Abdelmalek]

Suppose im1 is 512x512, im2 is 256x256 and im3 is 128x128

[n,m,p]=size(im1);
new_im2=imresize(im2,n,m);
new_im3=imresize(im3,n,m);
im_final=[im1;new_im2;new_im3]