Resizing and Repeating an Image

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I've been doing pretty well with images this week, but I've run into a problem. I am trying to take an image and make it 1/4th of it's original size, then have it repeated as a 2x2 matrix. Kind-of like this:

Given an input image:
           ---------------------
           |                   |
           |                   |
           |       IMG         | 
           |                   |
           |                   |
           ---------------------

   Firstly, shrink it to 1/4 of its original size:
           -----------
           |   img   | 
           |         | 
           |---------|

   Then concatenate it into a "2x2 array" of the shrunken image:
           ---------------------
           |   img   |   img   |
           |         |         |
           |---------|---------| 
           |   img   |   img   |
           |         |         |
           ---------------------

What I am struggling with is the fact that I do not know how to make it into a 2x2 array. Any suggestions? This isn't actually HW this time :) It's for studying purposes. Here's what I've tried so far:

function[newImg] = immultiply(picture)

Image = imread(picture); %// Reads in the picture
[r, c, l] = size(Image); %// Finds the images rows, columns and layers
rows = round(r ./ 2); %// Divides up the rows
columns = round(c ./ 2); %// Divides up the columns

newImg = cat(3,rows,columns,3); %// Creates my image, but just gives me a blank thing
imshow(newImg)


end

I will update as I work on it further. Thanks!

asked 53 secs ago

Jessica Marie

124

Resizing and Repeating an Image