How do I produce a solid green image directly above an imported image

I have imported an image and I require there to be a solid green image of the same dimensions directly above the imported image. How would I go about doing this? I have attempted using patch but to no success.

[KALYAN ACHARJYA]

directly above the imported image??

Question is not clear? What result you are expecting? May be you require one green image (plane) having size equal to the processed image. Clarify ?

[HG24]

Essentially I require 2 images, one of a solid green square and beneath it my imported image. I have attached an image of it

Answer 1

[KSSV]

I1 = imread('peppers.png') ; 
[nx,ny,nz] = size(I1) ; 

I2 = zeros(nx,ny,nz) ; 
I2(:,:,2) = 255 ; 

I12 = vertcat(I2,I1) ; 
imshow(I12)